able to subscribe for >10hrs and still running

Dependencies:   ADE7758_v1 Crypto DHT11 MQTT MbedJSONValue SDFileSystem SPI_TFT_ILI9341 SWSPI SetRTC TFT_fonts Touch W5500Interface mbed-rtos mbed-src tuanpm

Fork of PB_emma_controller_mbed_src by Emma

emmaCode.cpp

Committer:
arsenalist
Date:
2015-07-09
Revision:
6:45f50f1177db
Parent:
5:d00233dd36f5
Child:
7:7e8c6ad3fd64

File content as of revision 6:45f50f1177db:

#include "emmaCode.h"

//init debug port
Serial DBG(PA_9, PA_10);    //tx, rx

//init wifi port
Serial _ESP(PA_2, PA_3);    //tx, rx
//init espduino
ESP esp(&_ESP, &DBG, ESP_CH_PD, ESP_BAUD);
//init wifi mqtt
ESPMQTT mqtt(&esp);
//init wifi rest
REST rest(&esp);

//init eth port
SPI spi(PB_15, PB_14, PB_13);               //mosi, miso, sck
MQTTEthernet ipstack(&spi, PB_12, PC_6);    //spi, cs, reset
MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE> client(ipstack);

//init sd card
SDFileSystem sd(PA_7, PA_6, PA_5, PC_12, "sd"); //mosi, miso, sck, cs

//init ade7758
ADE7758 ADE(PB_5, PD_2, PB_4, PB_6, PB_7);

//emma settings
string emmaUID;
string hmac;
string platformDOMAIN;
string platformKEY;
string platformSECRET;
string wifiSSID;
string wifiPASS;
string gprsAPN;
string proxySERVER;
string proxyPORT;
string proxyAUTH;

//nodes settings
class NODES {
public:
    REST *restConn;
    NODES(REST *r);
    string macAddr;
    string ipAddr;
};
NODES::NODES(REST *r) {
    restConn = r;    
}
REST restObj[NODES_MAX] = {REST(&esp),REST(&esp),REST(&esp),REST(&esp),REST(&esp)};
NODES nodes[NODES_MAX] = {NODES(&restObj[0]),NODES(&restObj[1]),NODES(&restObj[2]),NODES(&restObj[3]),NODES(&restObj[4])};

//ade7758 variables
uint16_t AWattHrValue, BWattHrValue, CWattHrValue;
uint16_t AVAHrValue, BVAHrValue, CVAHrValue;
long AWattHrSum = 0;
long BWattHrSum = 0;    
long CWattHrSum = 0;
float AWattHr, BWattHr, CWattHr;
float AVrms, BVrms, CVrms;
float AIrms, BIrms, CIrms;
float AWatt, BWatt, CWatt;
float XWattHr,XVrms,XWatt;

//variables
bool ethAvailable = false;
bool wifiAvailable = false;
bool gprsAvailable = false;
bool ethConnected = false;
bool wifiConnected = false;
bool useProxy = false;
bool newCommand = false;
string globalCommand;
string rxBuf;

void emmaInit(void) {
    char s[64];
    DBG.baud(19200);
    DBG.printf("\r\nemmaInit\r\n");
    
    //read settings
    //readSetting("emmaUID");         //sd card need to be read once before working correctly
    //emmaUID = readSetting("emmaUID");
    emmaUID = "066eff575349896767073038";
    DBG.printf("emmaUID:%s\r\n",emmaUID.c_str());
    //calculate hmac
    for(int i=0; i<sizeof(s); i++) {
        s[i]=0; }
    sprintf(s,"emma-%s",emmaUID.c_str());   
    hmac = calculateMD5(s);
    DBG.printf("hmac:%s\r\n",hmac.c_str());
    //platformDOMAIN = readSetting("platformDOMAIN");
    platformDOMAIN = "testdulu";
    DBG.printf("platformDOMAIN:%s\r\n",platformDOMAIN.c_str());
    //platformKEY = readSetting("platformKEY");
    platformKEY = "5980e444-81dd-47ba-8222-6a40bc94fdce";
    DBG.printf("platformKEY:%s\r\n",platformKEY.c_str());
    //platformSECRET = readSetting("platformSECRET");
    platformSECRET = "3ca8ec0239fda2b6d12ba1580c91a052";
    DBG.printf("platformSECRET:%s\r\n",platformSECRET.c_str());
    //proxySERVER = readSetting("proxySERVER");
    DBG.printf("proxySERVER:%s\r\n",proxySERVER.c_str());
    //proxyPORT = readSetting("proxyPORT");
    DBG.printf("proxyPORT:%s\r\n",proxyPORT.c_str());
    //proxyAUTH = readSetting("proxyAUTH");
    DBG.printf("proxyAUTH:%s\r\n",proxyAUTH.c_str());
    
    //check proxy
    if(!proxySERVER.empty() && !proxyPORT.empty() && !proxyAUTH.empty()) {
        useProxy = true;
    } else {
        useProxy = false;    
    }
    //testing purpose
    useProxy = false;
    DBG.printf("proxy:%d\r\n",useProxy);
    
    //preset available interface
    wifiAvailable = true;
    ethAvailable = true;
}
void emmaModeWiFiConfig(void) {
    string str;
    
    if(wifiAvailable) {
        DBG.printf("emmaModeWiFiConfig\r\n");
        
        //set wifi module to configuration
        _ESP.printf("MODE=C");
        while(1) {
            char rcv[128] = {};
            rcvReply(rcv,3000);
            str = rcv;
            if(str.find("SC_STATUS_FIND_CHANNEL") != std::string::npos)
                break;
        }
        DBG.printf("entering wifi configuration mode\r\n");
        while(1) {
            char rcv[128] = {};
            rcvReply(rcv,3000);
            str = rcv;
            if(str.find("MODE=C OK") != std::string::npos) {
                //save wifiSSID and wifiPASS
                if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                    str.erase(str.begin(),str.begin()+str.find("[")+1);
                    str.erase(str.begin()+str.find("]"),str.end());
                            
                    MbedJSONValue jsonValue;
                    parse(jsonValue,str.c_str());
                        
                    char *parameter[2] = {"wifiSSID","wifiPASS"};
                        
                    for(int i=0; i<2; i++) {
                        if(jsonValue.hasMember(parameter[i])) {
                            string val = jsonValue[parameter[i]].get<std::string>();
                            //int st = writeSetting(parameter[i],val.c_str());
                            //if(st) {
                            //    DBG.printf("%s is saved\r\n",parameter[i]);
                            //} else {
                            //    DBG.printf("%s is not saved\r\n",parameter[i]);
                            //}
                        }
                    }
                } 
            }
        }    
    } else {
        DBG.printf("no wifi found\r\n");
    }
}
void emmaModeSettings(void) {
    bool clientIsConnected = false;
    bool serverIsListened = false;
    char s[32];
    string str;
    
    mkdir("/sd/settings",0777);
    //get and write emmaUID
    string uid = getUID();
    sprintf(s,"(%s)",uid.c_str());
    uid = s;
    writeSetting("emmaUID",uid);
    
    if(wifiAvailable) {
        DBG.printf("emmaModeSettings - wifi\r\n");
        
        _ESP.printf("MODE=S");
        while(1) {
            char rcv[128] = {};
            rcvReply(rcv,3000);
            str = rcv;
            if(str.find("MODE=S_OK") != std::string::npos)
                break;
        }
        DBG.printf("entering settings mode\r\n");
        while(1) {
            char rcv[512] = {};
            rcvReply(rcv,3000);
            //DBG.printf("rcv:%s\r\n",rcv);
            str = rcv;
            if(str.find("MODE=S_Config") != std::string::npos) {
                //save gprs and proxy setting
                if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                    str.erase(str.begin(),str.begin()+str.find("[")+1);
                    str.erase(str.begin()+str.find("]"),str.end());
                            
                    MbedJSONValue jsonValue;
                    parse(jsonValue,str.c_str());
                        
                    char *parameter[4] = {"gprsAPN","proxySERVER","proxyPORT","proxyAUTH"};
                        
                    for(int i=0; i<4; i++) {
                        if(jsonValue.hasMember(parameter[i])) {
                            string val = jsonValue[parameter[i]].get<std::string>();
                            int st = writeSetting(parameter[i],val.c_str());
                            if(st) {
                                DBG.printf("%s: %s is saved\r\n",parameter[i],val.c_str());
                            } else {
                                DBG.printf("%s is not saved\r\n",parameter[i]);
                            }
                        }
                    }
                }    
            } else if(str.find("connect") != std::string::npos) {
                DBG.printf("connection success!\r\n");
            }
        }
    } else if(ethAvailable) {
        DBG.printf("emmaModeSettings - eth\r\n");
        
        TCPSocketServer svr;
        TCPSocketConnection clientSock;
    
        if(svr.bind(SERVER_PORT) < 0) {
            DBG.printf("tcp server bind failed\r\n");    
        } else {
            DBG.printf("tcp server bind success\r\n");
            serverIsListened = true;    
        }
    
        DBG.printf("please connect to %s\r\n",ipstack.getEth().getIPAddress());
        
        if(svr.listen(1) < 0) {
            DBG.printf("tcp server listen failed\r\n");    
        } else {
            DBG.printf("tcp server is listening...\r\n");    
        }
    
        clientSock.set_blocking(false,30000);   //timeout after 30sec
    
        //listening
        while (serverIsListened) {
            if(svr.accept(clientSock) < 0) {
                DBG.printf("failed to accept connection\r\n");    
            } else {
                DBG.printf("connection success!\r\nIP: %s\r\n",clientSock.get_address());
                clientIsConnected = true;
            
                while(clientIsConnected) {
                    char buffer[1024] = {};
                    switch(clientSock.receive(buffer,1023)) {
                        case 0:
                            DBG.printf("received buffer is empty\r\n");
                            clientIsConnected = false;
                            break;
                        case -1:
                            DBG.printf("failed to read data from client\r\n");
                            clientIsConnected = false;
                            break;
                        default:
                            //DBG.printf("received data: %d\r\n%s\r\n",strlen(buffer),buffer);
                            DBG.printf("\r\n");
                        
                            str = buffer;
                            if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                                str.erase(str.begin(),str.begin()+str.find("[")+1);
                                str.erase(str.begin()+str.find("]"),str.end());
                            
                                MbedJSONValue jsonValue;
                                parse(jsonValue,str.c_str());
                        
                                char *parameter[4] = {"gprsAPN","proxySERVER","proxyPORT","proxyAUTH"};
                        
                                for(int i=0; i<4; i++) {
                                    if(jsonValue.hasMember(parameter[i])) {
                                        string val = jsonValue[parameter[i]].get<std::string>();
                                        int st = writeSetting(parameter[i],val.c_str());
                                        if(st) {
                                            DBG.printf("%s: %s is saved\r\n",parameter[i],val.c_str());
                                        } else {
                                            DBG.printf("%s is not saved\r\n",parameter[i]);
                                        }
                                    }
                                }
                            }
                            break;     
                    }    
                }
                DBG.printf("close connection\r\n");
                clientSock.close();
            }
        }
    } else {
        DBG.printf("no wifi or eth found\r\n");
    }
}
void emmaModeRegister(void) {
    bool emmaGetRegKey = false;
    bool emmaRegistered = false;
    char s[512];
    char r[256];
    int connPort;
    int loop = 0;
    string connData;
    string connHost;
    //string hmac;
    string str;
    string regKey;
    Timer t;
    
    //check connected interface
    connectedIface();
    DBG.printf("ethConnected:%d\r\n",ethConnected);
    DBG.printf("wifiConnected:%d\r\n",wifiConnected);
    
    //calculate hmac
    //for(int i=0; i<sizeof(s); i++) {
    //    s[i]=0; }
    //sprintf(s,"emma-%s",emmaUID.c_str());   
    //hmac = calculateMD5(s);
    //DBG.printf("hmac:%s\r\n",hmac.c_str());
    
    if(wifiConnected) {
        DBG.printf("emmaModeRegister - wifi\r\n");
        
        _ESP.printf("MODE=B");
        wait(1);
        while(!esp.ready());
        
        //set connHost, connPort
        if(useProxy) {
            connHost = proxySERVER;
            sscanf(proxyPORT.c_str(),"%d",&connPort);
        } else {
            connHost = EMMA_SERVER_HOST;
            connPort = EMMA_SERVER_PORT;
        }
        
        //rest begin
        if(!rest.begin(connHost.c_str(),connPort,false)) {
            DBG.printf("EMMA: fail to setup rest");
            while(1);    
        }
        //wifiConnected = true;   //with custom firmware, wifi module should connect automatically
        
        esp.process();
        if(wifiConnected) {
            //set connData
            if(useProxy) {
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                sprintf(s,"http://%s:%d/emma/api/controller/register?uid=%s&hmac=%s",EMMA_SERVER_HOST,EMMA_SERVER_PORT,emmaUID.c_str(),hmac.c_str());
                connData = s;
            } else {
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                sprintf(s,"/emma/api/controller/register?uid=%s&hmac=%s",emmaUID.c_str(),hmac.c_str());
                connData = s;
            }
         
            //register
            while(!emmaGetRegKey) {
                rest.get(connData.c_str());
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                rest.getResponse(s,sizeof(s));
                DBG.printf("rsp reg:%s\r\n",s);

                //check and save platform setting
                str = s;
                if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                    str.erase(str.begin(),str.begin()+str.find("[")+1);
                    str.erase(str.begin()+str.find("]"),str.end());
        
                    MbedJSONValue jsonValue;
                    parse(jsonValue,str.c_str());
    
                    char *parameter[4] = {"platformDOMAIN","platformKEY","platformSECRET","registrationKey"};
    
                    //save platform parameter
                    writeSetting(parameter[0],"()");    //sd card need to be initialized
                    for(int i=0; i<3; i++) {
                        if(jsonValue.hasMember(parameter[i])) {
                            string val = jsonValue[parameter[i]].get<std::string>();
                            int st = writeSetting(parameter[i],val.c_str());
                            if(st) {
                                DBG.printf("%s: %s is saved\r\n",parameter[i],val.c_str());
                            } else {
                                DBG.printf("%s is not saved\r\n",parameter[i]);
                            }
                        }
                    }
        
                    //get registrationKey
                    if(jsonValue.hasMember(parameter[3])) {
                        string val = jsonValue[parameter[3]].get<std::string>();
                        if(val.find("(") != std::string::npos && val.find(")") != std::string::npos) {
                            val.erase(val.begin(),val.begin()+val.find("(")+1);
                            val.erase(val.begin()+val.find(")"),val.end());
                            regKey = val;
                            DBG.printf("%s: %s\r\n",parameter[3],regKey.c_str());
                            emmaGetRegKey = true;
                        }
                    }
                }
            }
                
            //calculate hmac
            for(int i=0; i<sizeof(r); i++) {
                r[i]=0; }
            sprintf(r,"emma-%s-%s",emmaUID.c_str(),regKey.c_str());
            hmac = calculateMD5(r);
            DBG.printf("hmac:%s\r\n",hmac.c_str());
            
            //set connData
            if(useProxy) {
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                sprintf(s,"http://%s:%d/emma/api/controller/verify?uid=%s&registrationKey=%s&hmac=%s",EMMA_SERVER_HOST,EMMA_SERVER_PORT,emmaUID.c_str(),regKey.c_str(),hmac.c_str());
                connData = s;
            } else {
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                sprintf(s,"/emma/api/controller/verify?uid=%s&registrationKey=%s&hmac=%s",emmaUID.c_str(),regKey.c_str(),hmac.c_str());
                connData = s;
            }
                
            //verify registration
            while(!emmaRegistered && loop < 12){
                rest.get(connData.c_str());
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                rest.getResponse(s,sizeof(s));
                DBG.printf("rsp vrf:%s\r\n",s);
                
                //check verification
                str = s;
                if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                    str.erase(str.begin(),str.begin()+str.find("[")+1);
                    str.erase(str.begin()+str.find("]"),str.end());
                    
                    MbedJSONValue jsonValue;
                    parse(jsonValue,str.c_str());
                    if(jsonValue.hasMember("user")) {
                        string val = jsonValue["user"].get<std::string>();
                        DBG.printf("%s is registered\r\n",val.c_str());
                        emmaRegistered = true;
                    }
                }
                wait(5);
                loop++;
            }
            
            //check whether registration success
            if(emmaRegistered) {
                DBG.printf("registration successful\r\n");
            } else {
                DBG.printf("registration unsuccessful\r\n");
            }
            while(1);
        }
        
    } else if(ethConnected) {
        DBG.printf("emmaModeRegister - eth\r\n");
        
        //set connHost, connPort, connData
        if(useProxy) {
            DBG.printf("use proxy\r\n");
            connHost = proxySERVER;
            sscanf(proxyPORT.c_str(),"%d",&connPort);
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"GET http://%s:%d/emma/api/controller/register?uid=%s&hmac=%s HTTP/1.0\nHost: %s\r\n\r\n",EMMA_SERVER_HOST,EMMA_SERVER_PORT,emmaUID.c_str(),hmac.c_str(),EMMA_SERVER_HOST);
            connData = s;
        } else {
            DBG.printf("no proxy\r\n");
            connHost = EMMA_SERVER_HOST;
            connPort = EMMA_SERVER_PORT;
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"GET /emma/api/controller/register?uid=%s&hmac=%s HTTP/1.0\nHost: %s\r\n\r\n",emmaUID.c_str(),hmac.c_str(),EMMA_SERVER_HOST);
            connData = s;
        }
        
        //register
        while(!emmaGetRegKey) {
            str = "";
            str = ethGET(connHost,connPort,connData);
            DBG.printf("rsp reg:%s\r\n",str.c_str());

            //check and save platform setting
            if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                str.erase(str.begin(),str.begin()+str.find("[")+1);
                str.erase(str.begin()+str.find("]"),str.end());
        
                MbedJSONValue jsonValue;
                parse(jsonValue,str.c_str());
    
                char *parameter[4] = {"platformDOMAIN","platformKEY","platformSECRET","registrationKey"};
    
                //save platform parameter
                writeSetting(parameter[0],"()");    //sd card need to be initialized
                for(int i=0; i<3; i++) {
                    if(jsonValue.hasMember(parameter[i])) {
                        string val = jsonValue[parameter[i]].get<std::string>();
                        int st = writeSetting(parameter[i],val.c_str());
                        if(st) {
                            DBG.printf("%s: %s is saved\r\n",parameter[i],val.c_str());
                        } else {
                            DBG.printf("%s is not saved\r\n",parameter[i]);
                        }
                    }
                }
        
                //get registrationKey
                if(jsonValue.hasMember(parameter[3])) {
                    string val = jsonValue[parameter[3]].get<std::string>();
                    if(val.find("(") != std::string::npos && val.find(")") != std::string::npos) {
                        val.erase(val.begin(),val.begin()+val.find("(")+1);
                        val.erase(val.begin()+val.find(")"),val.end());
                        regKey = val;
                        DBG.printf("%s: %s\r\n",parameter[3],regKey.c_str());
                        emmaGetRegKey = true;
                    }
                }
            }
        }
        
        //calculate hmac
        for(int i=0; i<sizeof(r); i++) {
            r[i]=0; }
        sprintf(r,"emma-%s-%s",emmaUID.c_str(),regKey.c_str());
        hmac = calculateMD5(r);
        DBG.printf("hmac:%s\r\n",hmac.c_str());
        
        //set connData
        if(useProxy) {
            DBG.printf("use proxy\r\n");
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"GET http://%s:%d/emma/api/controller/verify?uid=%s&registrationKey=%s&hmac=%s HTTP/1.0\nHost: %s\r\n\r\n",EMMA_SERVER_HOST,EMMA_SERVER_PORT,emmaUID.c_str(),regKey.c_str(),hmac.c_str(),EMMA_SERVER_HOST);
            connData = s;
        } else {
            DBG.printf("no proxy\r\n");
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"GET /emma/api/controller/verify?uid=%s&registrationKey=%s&hmac=%s HTTP/1.0\nHost: %s\r\n\r\n",emmaUID.c_str(),regKey.c_str(),hmac.c_str(),EMMA_SERVER_HOST);
            connData = s;
        }
        
        //verify registration
        while(!emmaRegistered && loop < 12){
            str = "";
            str = ethGET(connHost,connPort,connData);
            DBG.printf("rsp vrf:%s\r\n",str.c_str());
                
            //check verification
            if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
                str.erase(str.begin(),str.begin()+str.find("[")+1);
                str.erase(str.begin()+str.find("]"),str.end());
                    
                MbedJSONValue jsonValue;
                parse(jsonValue,str.c_str());
                if(jsonValue.hasMember("user")) {
                    string val = jsonValue["user"].get<std::string>();
                    DBG.printf("%s is registered\r\n",val.c_str());
                    emmaRegistered = true;
                }
            }
            wait(5);
            loop++;
        }
            
        //check whether registration success
        if(emmaRegistered) {
            DBG.printf("registration successful\r\n");
        } else {
            DBG.printf("registration unsuccessful\r\n");
        }
        while(1);
        
    } else if(gprsAvailable) {
        DBG.printf("emmaModeRegister - gprs\r\n");
        
    } else {
        DBG.printf("no wifi, eth, or gprs found\r\n");
    }
}

void emmaModeOperation(void) {
    char mqttClientId[32];
    char r[32];
    char s[512];
    int loop=0;
    //string hmac;
    string str;
    Timer t;
    Timer tNodes;
    
    //check connected interface
    connectedIface();
    DBG.printf("ethConnected:%d\r\n",ethConnected);
    DBG.printf("wifiConnected:%d\r\n",wifiConnected);
    
    //check firmware update
    
    //execute last state of switches on board
    
    //get list of nodes from server
    
    //calculate hmac
    //for(int j=0; j<sizeof(s); j++) {
    //    s[j]=0; }
    //sprintf(s,"emma-%s",emmaUID.c_str());   
    //hmac = calculateMD5(s);
    //DBG.printf("hmac:%s\r\n",hmac.c_str());
    
    //operation wifi
    if(wifiConnected) {
        DBG.printf("emmaModeOperation - wifi\r\n");
    
        //do not delete code below - indicator that esp need to MODE=B and esp.ready() to work
        //_ESP.printf("MODE=B");
        //wait(1);
        //while(!esp.ready());
        
        DBG.printf("emma: setup mqtt client\r\n");
        sprintf(mqttClientId,"emma/%s",emmaUID.c_str());
    
        if(mqtt.begin(mqttClientId, platformKEY.c_str(), platformSECRET.c_str(), 120, 1)) {
            //mqtt.lwt("/lwt", "offline", 0, 0);
            mqtt.connectedCb.attach(&mqttConnected);
            mqtt.disconnectedCb.attach(&mqttDisconnected);
            //mqtt.publishedCb.attach(&mqttPublished);
            //mqtt.dataCb.attach(&mqttData);
            mqtt.connect(MQTT_HOST,MQTT_PORT,false);
            DBG.printf("emma: success to setup mqtt\r\n");    
        }
        DBG.printf("emma: system started\r\n");
        
        t.start();
        while(t.read_ms() < 5000) {
            esp.process();    
        }
        t.stop();
        t.reset();
        
        //set ade7758 parameter
        ADE.begin();
        ADE.AVRMSCalib = 1526873.00;
        ADE.BVRMSCalib = 534202.00;
        ADE.CVRMSCalib = 456990.00;
        ADE.AIRMSCalib = 39248.00;
        ADE.BIRMSCalib = 654.00;
        ADE.CIRMSCalib = 111.00;
        
        ADE.writeRMSOffset(AIRMSOFFSET, BIRMSOFFSET, CIRMSOFFSET, AVRMSOFFSET, BVRMSOFFSET, CVRMSOFFSET);
        
        ADE.write16bits(AWG, 0);
        ADE.write16bits(BWG, 0);
        ADE.write16bits(CWG, 0);
        ADE.write16bits(AVAG, 0);
        ADE.write16bits(BVAG, 0);
        ADE.write16bits(CVAG, 0);
        
        ADE.AWhLSB = 0.00006025556;
        ADE.BWhLSB = 0.25075167;
        ADE.CWhLSB = 0.25075167;
        
        ADE.AVAhLSB = 0.00008370;
        ADE.BVAhLSB = 0;
        ADE.CVAhLSB = 0;
        
        //init rest to server
        if(rest.begin(EMMA_SERVER_HOST,8080,false)) {
            DBG.printf("rest to server is created\r\n");
        } else {
            DBG.printf("rest to server is NOT created\r\n");
        }
        
        //preset nodes' macAddr and ipAddr
        nodes[0].macAddr = "002629034222";
        nodes[0].ipAddr = "192.168.2.15";
        nodes[1].macAddr = "00262903424e";
        nodes[1].ipAddr = "192.168.2.32";
        
        //init rest to remotes
        for(int i=0; i<NODES_MAX; i++) {
            if(!nodes[i].ipAddr.empty()) {
                DBG.printf("restConn nodes[%d] is created\r\n",i);
                nodes[i].restConn->begin(nodes[i].ipAddr.c_str(),16038,false);
                wait(1);
            } else {
                DBG.printf("restConn nodes[%d] is NOT created\r\n",i);
                wait(1);
            }
        }
        
        _ESP.attach(&rxInterrupt,Serial::RxIrq);
        
        //define thread
        osThreadDef(energyThread, osPriorityBelowNormal, (4*DEFAULT_STACK_SIZE));
        //create thread
        osThreadCreate(osThread(energyThread),NULL);
        
        t.start();
        tNodes.start();
        wait(1);
        while(1) {
            checkRxBuffer();
            checkVoltagePower();
            //panelEnergy, panelVoltage, and panelPower
            if(t.read_ms() > 10000) {
                DBG.printf("[%d]WattHR for each phase: %.2f, %.2f, %.2f\r\n", loop, AWattHr, BWattHr, CWattHr);
                DBG.printf("VRMS for each phase: %.2f, %.2f, %.2f\r\n", AVrms, BVrms, CVrms);
                DBG.printf("Watt for each phase: %.2f, %.2f, %.2f\r\n", AWatt, BWatt, CWatt);
                
                //for(int i=1; i<4; i++) {
                for(int i=1; i<2; i++) {
                    DBG.printf("sending channel: %d\r\n",i);
                    if(i==1){
                        XWattHr = AWattHr;
                        XVrms = AVrms;
                        XWatt = AWatt;    
                    } else if(i==2) {
                        XWattHr = BWattHr;
                        XVrms = BVrms;
                        XWatt = BWatt;
                    } else {
                        XWattHr = CWattHr;
                        XVrms = CVrms;
                        XWatt = CWatt;
                    }
                    sprintf(r,"/emma/api/controller/energy/%d",i);
                    sprintf(s,"{\"uid\":\"%s\",\"hmac\":\"%s\",\"time\":\"2015-06-09 12:32:12\",\"energy\":%.2f,\"voltage\":%.2f,\"power\":%.2f}",
                    emmaUID.c_str(),hmac.c_str(),XWattHr,XVrms,XWatt);
                    rest.post(r,s);
                    wait(2);
                    if(rxBuf.find("\"status\":\"success\"") != std::string::npos) {
                        DBG.printf("send channel: %d success\r\n",i);    
                    } else {
                        DBG.printf("send channel: %d failed\r\n",i);    
                    }
                }
                t.reset();
                loop++;    
            }
            
            checkRxBuffer();
            checkVoltagePower();
            //nodeTemp
            if(tNodes.read_ms() > 30000) {
                DBG.printf("getNodesTemperature\r\n");
                
                for(int i=0; i<NODES_MAX; i++) {
                    if(!nodes[i].ipAddr.empty()) {
                        //get node's temp
                        string temp;
                        nodes[i].restConn->get("/","<?xml version=\"1.0\" encoding=\"utf-8\"?><app_cmd cmd=\"2\"/>\r\n");
                        wait(2);
                        temp = rxBuf;
                        if(temp.rfind(nodes[i].ipAddr) != std::string::npos) {
                            temp.erase(temp.begin(),temp.begin()+temp.rfind(nodes[i].ipAddr));
                            if(temp.rfind("temp=") != std::string::npos) {
                                temp.erase(temp.begin(),temp.begin()+temp.rfind("temp=")+6);
                                temp.erase(temp.begin()+temp.find("\""),temp.end());
                            } else {
                                temp = "0"; //connect to node, but receive none
                            }
                        } else {
                            temp = "0";     //not connected to node
                        }
                    
                        DBG.printf("nodeTemp[%d]:%s\r\n",i,temp.c_str());
                    
                        //send node's temp
                        sprintf(s,"{\"uid\":\"%s\",\"hmac\":\"%s\",\"time\":\"2015-06-09 12:32:12\",\"mac\":\"%s\",\"value\":%s}",
                        emmaUID.c_str(),hmac.c_str(),nodes[i].macAddr.c_str(),temp.c_str());
                        rest.post("/emma/api/controller/nodetemp",s);
                        wait(2);
                        temp = rxBuf;
                        if(temp.rfind("/nodetemp") != std::string::npos) {
                            temp.erase(temp.begin(),temp.begin()+temp.rfind("/nodetemp"));
                            if(temp.find("\"status\":\"success\"") != std::string::npos) {
                                DBG.printf("send nodeTemp success\r\n");
                            } else {
                                DBG.printf("send nodeTemp failed\r\n");
                            }
                        }
                        checkRxBuffer();
                        checkVoltagePower();
                    }    
                }
            }    
            checkRxBuffer();
            checkVoltagePower();
            //command
            if(newCommand) {
                DBG.printf("newCommand:\r\n%s\r\n",globalCommand.c_str());
                MbedJSONValue jsonValue;
                parse(jsonValue,globalCommand.c_str());
                char *parameter[5] = {"id","nType","nAddr","dType","cmd"};
                
                //check if command is valid
                bool validCommand = true;
                for(int i=0; i<5; i++) {
                    validCommand = validCommand && jsonValue.hasMember(parameter[i]);
                }
                DBG.printf("command validity:%d\r\n",validCommand);
                
                if(validCommand) {
                    string commandId = jsonValue[parameter[0]].get<std::string>();
                    string commandNType = jsonValue[parameter[1]].get<std::string>();
                    string commandNAddr = jsonValue[parameter[2]].get<std::string>();
                    string commandDType = jsonValue[parameter[3]].get<std::string>();
                    string commandCmd = jsonValue[parameter[4]].get<std::string>();
                    
                    if(commandNType == "0") {       //switch on panel controller
                        DBG.printf("command for switch\r\n");
                    }
                    else if(commandNType == "1") {  //node with mac address
                        DBG.printf("command for node\r\n");
                        //get node ip address based on node mac address
                        //string nodeIP;
                        //nodeIp = readNodeIP(commandNAddr);
                        //nodeIP = "192.168.2.15";
                        //DBG.printf("nodeIP: %s\r\n",nodeIP.c_str());
                    
                        //get index of node list based on mac address
                        int idx = NODES_INVALID;
                        for(int i=0; i<NODES_MAX; i++) {
                            if(!nodes[i].macAddr.compare(commandNAddr)) {
                                idx = i;
                            }
                        }
                    
                        //execution process
                        int trial;
                        string execResult = "notExecuted";
                        if(idx != NODES_INVALID) {
                            DBG.printf("index found at %d\r\n",idx);
                        
                            //get cmd string based on device type and command number
                            string nodeCmd;
                            //nodeCmd = readNodeCmd(commandDType,commandCmd);
                            nodeCmd = "020129A0163B161315131613153C151316131514143C153C16141414141415151315141414141514141415141414143D1514143D141415141414143D14000D"; //turn off
                            //DBG.printf("nodeCmd: %s\r\n",nodeCmd.c_str());
                        
                            //execute command
                            DBG.printf("executing command\r\n");
                            sprintf(s,"<?xml version=\"1.0\" encoding=\"utf-8\"?><app_cmd cmd=\"5\" /><app_data code=\"%s\"/>\r\n",nodeCmd.c_str());
                            
                            trial=0;
                            while(1) {
                                //cmdExecuted = false;
                                if(trial>=2) {   //two times trial
                                    DBG.printf("cmd is not executed\r\n");
                                    break;    
                                }
                                nodes[idx].restConn->get("/",s);
                                wait(2);
                                if(rxBuf.find("REST: Sent") != std::string::npos) {
                                    DBG.printf("cmd executed\r\n");
                                    execResult = "executed";
                                    break;    
                                }
                                trial++;
                            }    
                        }
                    
                        wait(2);       
                        //send execution result
                        DBG.printf("send execution result\r\n");
                        sprintf(s,"{\"id\":\"%s\",\"nType\":\"%s\",\"nAddr\":\"%s\",\"dType\":\"%s\",\"cmd\":\"%s\",\"result\":\"%s\"}",
                        commandId.c_str(),commandNType.c_str(),commandNAddr.c_str(),commandDType.c_str(),commandCmd.c_str(),execResult.c_str());
                    
                        trial=0;
                        while(1) {
                            if(trial>=2) {   //two times trial
                                DBG.printf("send execution result failed\r\n");
                                break;    
                            }
                            rest.post("/emma/api/controller/test",s);
                            wait(2);
                            if(rxBuf.find("\"status\":\"OK\"") != std::string::npos) {
                                DBG.printf("send execution result success\r\n");
                                break;    
                            }
                            trial++;
                        }
                    }
                }
                newCommand = false;
            }
            osDelay(5000);    
        }
    }
    //operation eth
/*
    DBG.printf("IP Address:%s\r\n",ipstack.getEth().getIPAddress());
    DBG.printf("MAC Address:%s\r\n",ipstack.getEth().getMACAddress());
    ethMQTTAttemptConnect(&client, &ipstack);
    t.start();
    DBG.printf("start\r\n");
    while(true) {
        if(!ipstack.getEth().linkstatus()) {
            NVIC_SystemReset();  
        }
        //if(t.read_ms() > 5000) {
        //    if(publish(&client,&ipstack) != 0)
        //        ethMQTTAttemptConnect(&client, &ipstack);
        //    t.reset();
        //}
        
        //check for new command
        if(newCommand) {
            DBG.printf("newCommand\r\n");
            DBG.printf("globalCommand: %s\r\n",globalCommand.c_str());
            //string qw(globCmd);
            
            //if(cmd.find("[") != std::string::npos && cmd.find("]") != std::string::npos) {
            //    cmd.erase(cmd.begin(),cmd.begin()+cmd.find("[")+1);
            //    cmd.erase(cmd.begin()+cmd.find("]"),cmd.end());
                //globalCommand = cmd;
                //newCommand = true;
            //}
            
            MbedJSONValue jsonValue;
            parse(jsonValue,globalCommand.c_str());
            char *parameter[5] = {"id","nType","nAddr","dType","cmd"};
                
            //check if command is valid
            bool validCommand = true;
            for(int i=0; i<5; i++) {
                validCommand = validCommand && jsonValue.hasMember(parameter[i]);
            }
            DBG.printf("is command valid:%d\r\n",validCommand);
                
            if(validCommand) {
                string commandId = jsonValue[parameter[0]].get<std::string>();
                string commandNType = jsonValue[parameter[1]].get<std::string>();
                string commandNAddr = jsonValue[parameter[2]].get<std::string>();
                string commandDType = jsonValue[parameter[3]].get<std::string>();
                string commandCmd = jsonValue[parameter[4]].get<std::string>();
                    
                if(commandNType == "0") {       //switch on panel controller
                    DBG.printf("command for switch\r\n");
                }
                else if(commandNType == "1") {  //node with mac address
                    DBG.printf("command for node\r\n");
                    //get node ip address based on node mac address
                    string nodeIP = readNodeIP(commandNAddr);
                    DBG.printf("nodeIP: %s\r\n",nodeIP.c_str());
                        
                    //get cmd string based on device type and command number
                    string nodeCmd = readNodeCmd(commandDType,commandCmd);
                    DBG.printf("nodeCmd: %s\r\n",nodeCmd.c_str());
                        
                    //execute command
                    int trial=0;
                    string execStatus="failed";
                    
                    while(1) {
                        sprintf(s,"<?xml version=\"1.0\" encoding=\"utf-8\"?><app_cmd cmd=\"5\" /><app_data code=\"%s\"/>\r\n",nodeCmd.c_str());
                        str = s;
                        string rcv = ethGET(nodeIP,REMOTE_TCP_PORT,str);
                        DBG.printf("response:%s\r\n",rcv.c_str());
                        str = rcv;
                        if(str.find("OK") != std::string::npos) {
                            DBG.printf("cmd executed\r\n");
                            execStatus = "success";
                            break;    
                        }
                        if(trial>0) {   //two times trial
                            DBG.printf("cmd is not executed\r\n");
                            break;    
                        }
                        trial++;
                        wait(3);
                    }
                    
                    //send execution status
                }
            }
            
            newCommand = false;    
        } 
        client.yield(100);  //allow MQTT client to receive message
    }
*/    
    
    //----------------------------------------------------------------------------------    
}
void emmaModeFirmwareDownload(void) {
    bool emmaGetFirmwareParam = false;
    
    DBG.printf("emmaModeFirmwareDownload\r\n");
    
    char s[384];
    string str;
    string connData;
    string chunk;
    
    //firmware parameter
    string firmwareVer;
    string firmwareName;
    int numPart;
    
    //downloading
    string firmwarePart;
    string calcMD5;
    string srvrMD5;
    bool nextPart;
    
    //set wifi to mode bridge
    _ESP.printf("MODE=B");
    DBG.printf("set mode bridge\r\n");
    while(1) {
        char rcv[128] = {};
        rcvReply(rcv,3000);
        str = rcv;
        if(str.find("MODE=B_OK") != std::string::npos)
            break;
    }
    DBG.printf("MODE=B\r\n");
    
    esp.enable();
    wait(1);
    while(!esp.ready());
    
    if(!rest.begin("candra.tritronik.com",3128,false)) {
        DBG.printf("EMMA: fail to setup rest");
        while(1);    
    }
    
    //wifiConnected = true; //with custom firmware, panel should connect wifi automatically
    useProxy = true;
    
    esp.process();
    //set connData
    if(useProxy) {
        for(int i=0; i<sizeof(s); i++) {
            s[i]=0; }
        //sprintf(s,"http://%s:%d/emma/api/controller/register?uid=%s&hmac=%s",EMMA_SERVER_HOST,EMMA_SERVER_PORT,emmaUID.c_str(),hmac.c_str());
        sprintf(s,"http://192.168.128.69/emmaController/firmware/firmwareParameter");
        connData = s;
    } else {
        for(int i=0; i<sizeof(s); i++) {
            s[i]=0; }
        //sprintf(s,"/emma/api/controller/register?uid=%s&hmac=%s",emmaUID.c_str(),hmac.c_str());
        sprintf(s,"/emmaController/firmware/firmwareParameter");
        connData = s;
    }
    
    //get parameter of firmware to be downloaded
    while(!emmaGetFirmwareParam) {
        rest.get(connData.c_str());
        for(int i=0; i<sizeof(s); i++) {
            s[i]=0; }
        rest.getResponse(s,sizeof(s));
        //DBG.printf("rsp param:%s\r\n",s);
        
        str = s;
        if(str.find("[") != std::string::npos && str.find("]") != std::string::npos) {
            str.erase(str.begin(),str.begin()+str.find("[")+1);
            str.erase(str.begin()+str.find("]"),str.end());
            
            MbedJSONValue jsonValue;
            parse(jsonValue,str.c_str());
            
            char *parameter[2] = {"firmwareVer","numPart"};
            
            for(int i=0; i<2; i++) {
                if(jsonValue.hasMember(parameter[i])) {
                    string val = jsonValue[parameter[i]].get<std::string>();
                    if(i==0) {
                        firmwareVer = val;    
                    } else if(i==1) {
                        sscanf(val.c_str(),"%d",&numPart);
                    }
                }
            }
            
            if(!firmwareVer.empty() && numPart!=0) {
                emmaGetFirmwareParam = true;    
            }
        }
    }
    DBG.printf("firmwareVer:%s\r\n",firmwareVer.c_str());
    DBG.printf("numPart:%d\r\n",numPart);
    
    //clear firmware file
    while(1) {
        if(clearFirmware()){
            DBG.printf("clear firmware on sd card\r\n\r\n");
            break;
        }
        wait(1);
    }
    
    //set connData
    if(useProxy) {
        for(int i=0; i<sizeof(s); i++) {
            s[i]=0; }
        sprintf(s,"http://192.168.128.69/emmaController/firmware/%s",firmwareVer.c_str());
        connData = s;
    } else {
        for(int i=0; i<sizeof(s); i++) {
            s[i]=0; }
        sprintf(s,"/emmaController/firmware/%s",firmwareVer.c_str());
        connData = s;
    }
    
    //download firmware
    for(int n=0; n<numPart; n++) {
        nextPart = false;
        while(!nextPart) {
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"%s/firmware_Hex_%s_%d",connData.c_str(),firmwareVer.c_str(),n);
            rest.get(s);
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            rest.getResponse(s,sizeof(s));
            //DBG.printf("rsp[%d]:%s\r\n",n,s);
        
            str = s;
            if(str.find("{") != std::string::npos && str.find("}") != std::string::npos) {
                str.erase(str.begin(),str.begin()+str.find("{")+1);
                str.erase(str.begin()+str.find("}"),str.end());
                //DBG.printf("firmwarePart[%d]:%s\r\n",n,str.c_str());
                firmwarePart = str;
            
                //calculated MD5
                calcMD5 = calculateMD5(firmwarePart);
                //DBG.printf("calcMD5[%d]:%s\r\n",n,calcMD5.c_str());
            
                //MD5 from server
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                sprintf(s,"%s/MD5/firmware_MD5_%s_%d",connData.c_str(),firmwareVer.c_str(),n);
                rest.get(s);
                for(int i=0; i<sizeof(s); i++) {
                    s[i]=0; }
                rest.getResponse(s,sizeof(s));
            
                str = s;
                if(str.find("{") != std::string::npos && str.find("}") != std::string::npos) {
                    str.erase(str.begin(),str.begin()+str.find("{")+1);
                    str.erase(str.begin()+str.find("}"),str.end());
                    srvrMD5 = str;
                    //DBG.printf("srvrMD5[%d]:%s\r\n",n,srvrMD5.c_str());
                
                    //compare original MD5 vs MD5 from server
                    if(strcmp(calcMD5.c_str(),srvrMD5.c_str()) == 0) {
                        //DBG.printf("MD5 correct\r\n");
                        
                        //save to sd card
                        int st = writeFirmwareHexToChar(firmwarePart);
                        if(st) {
                            DBG.printf("firmwarePart[%d/%d] written\r\n",n,numPart-1);
                            nextPart = true;    
                        }
                    
                    } else {
                        DBG.printf("MD5 incorrect\r\n");    
                    }
                }   
            } else {
                DBG.printf("retry to fetch firmwarePart[%d]\r\n",n);    
            }
            wait(0.5);
        }
    }
    DBG.printf("download finished\r\n");
}

/*start energy related*/
void energyThread(void const*) {
    while(1) {
        //DBG.printf("insideEnergyThread\r\n");
        //osDelay(5000);
        
        //calculate energy
        DBG.printf("energyThread-start\r\n");
        float period = 0;
        AWattHrSum = 0;
        BWattHrSum = 0;
        CWattHrSum = 0;
        while(period < 1*60.0) {
            period += ADE.getAccumulationTime(PHASE_A);
            ADE.getAccumulatedEnergy(PHASE_A, &AWattHrValue, &BWattHrValue, &CWattHrValue, &AVAHrValue, &BVAHrValue, &CVAHrValue);
            AWattHrSum += AWattHrValue;
            BWattHrSum += BWattHrValue;
            CWattHrSum += CWattHrValue;
        }
        AWattHr = AWattHrSum * ADE.AWhLSB;
        BWattHr = BWattHrSum * ADE.BWhLSB;
        CWattHr = CWattHrSum * ADE.CWhLSB;
        
        DBG.printf("energyThread-finish\r\n");
    }
}
void checkVoltagePower() {
    //check if voltage or power violates threshold
    char s[256];
    string str;
    
    //DBG.printf("checkVoltagePower-start\r\n");

    AVrms = ADE.VRMS(PHASE_A) * 2*0.000158;   //constants are from calculateVRMS function
    BVrms = ADE.VRMS(PHASE_B) * 2*0.000157;
    CVrms = ADE.VRMS(PHASE_C) * 2*0.000156;
    
    AIrms = ADE.IRMS(PHASE_A) * 0.0000125;  //constants are from calculateIRMS function
    BIrms = ADE.IRMS(PHASE_B) * 0.0000123;
    CIrms = ADE.IRMS(PHASE_C) * 0.0000124;
    
    AWatt = AVrms * AIrms;
    BWatt = BVrms * BIrms;
    CWatt = CVrms * CIrms;
    
    if(AVrms > VRMSTHRESHOLD || AWatt > WATTTHRESHOLD) {
        DBG.printf("alert on ch1\r\n");
        sprintf(s,"{\"uid\":\"%s\",\"hmac\":\"%s\",\"time\":\"2015-06-09 12:32:12\",\"voltage\":%.2f,\"power\":%.2f}",
        emmaUID.c_str(),hmac.c_str(),AVrms,AWatt);
        rest.post("/emma/api/controller/alert/1",s);
        wait(2);
        str = rxBuf;
        if(str.rfind("/alert/1") != std::string::npos) {
            str.erase(str.begin(),str.begin()+str.rfind("/alert/1"));
            if(str.find("\"status\":\"success\"") != std::string::npos) {
                DBG.printf("send alert ch1 success\r\n");
            } else {
                DBG.printf("send alert ch1 failed\r\n");
            }
        }
    }
    
    if(BVrms > VRMSTHRESHOLD || BWatt > WATTTHRESHOLD) {
        DBG.printf("alert on ch2\r\n");
        sprintf(s,"{\"uid\":\"%s\",\"hmac\":\"%s\",\"time\":\"2015-06-09 12:32:12\",\"voltage\":%.2f,\"power\":%.2f}",
        emmaUID.c_str(),hmac.c_str(),BVrms,BWatt);
        rest.post("/emma/api/controller/alert/2",s);
        wait(2);
        str = rxBuf;
        if(str.rfind("/alert/2") != std::string::npos) {
            str.erase(str.begin(),str.begin()+str.rfind("/alert/2"));
            if(str.find("\"status\":\"success\"") != std::string::npos) {
                DBG.printf("send alert ch2 success\r\n");
            } else {
                DBG.printf("send alert ch2 failed\r\n");
            }
        }
    }
    
    if(CVrms > VRMSTHRESHOLD || CWatt > WATTTHRESHOLD) {
        DBG.printf("alert on channel C\r\n");
        DBG.printf("alert on ch3\r\n");
        sprintf(s,"{\"uid\":\"%s\",\"hmac\":\"%s\",\"time\":\"2015-06-09 12:32:12\",\"voltage\":%.2f,\"power\":%.2f}",
        emmaUID.c_str(),hmac.c_str(),CVrms,CWatt);
        rest.post("/emma/api/controller/alert/3",s);
        wait(2);
        str = rxBuf;
        if(str.rfind("/alert/3") != std::string::npos) {
            str.erase(str.begin(),str.begin()+str.rfind("/alert/3"));
            if(str.find("\"status\":\"success\"") != std::string::npos) {
                DBG.printf("send alert ch3 success\r\n");
            } else {
                DBG.printf("send alert ch3 failed\r\n");
            }
        }
    }
    //DBG.printf("checkVoltagePower-finish\r\n");
}
/*end energy related*/

/*start wifi mqtt*/
void wifiCb(void* response) {
    uint32_t status;
    RESPONSE res(response);
    
    if(res.getArgc() == 1) {
        res.popArgs((uint8_t*)&status,4);
        if(status == STATION_GOT_IP) {
            DBG.printf("WIFI Connected\r\n");
            mqtt.connect(MQTT_HOST,MQTT_PORT,false);
            wifiConnected = true;
        }
        else {
            wifiConnected = false;
            mqtt.disconnect();    
        }
    }
}
void mqttConnected(void* response) {
    DBG.printf("MQTT Connected\r\n");
    char mqttTopic[64];
    sprintf(mqttTopic,"%s/%s/command",platformDOMAIN.c_str(),emmaUID.c_str());
    mqtt.subscribe(mqttTopic);
}
void mqttDisconnected(void* response) {
    DBG.printf("MQTT Disconnected\r\n");    
}
void mqttData(void* response) {
    RESPONSE res(response);
    
    //DBG.printf("Received:\r\n");
    //DBG.printf("topic=");
    string topic = res.popString();
    DBG.printf(topic.c_str());
    DBG.printf("\r\n");
    
    //DBG.printf("command=");
    string cmd = res.popString();
    DBG.printf(cmd.c_str());
    DBG.printf("\r\n");
    
    //check whether cmd is json
    if(cmd.find("[") != std::string::npos && cmd.find("]") != std::string::npos) {
        cmd.erase(cmd.begin(),cmd.begin()+cmd.find("[")+1);
        cmd.erase(cmd.begin()+cmd.find("]"),cmd.end());
        globalCommand = cmd;
        newCommand = true;
    }
}
void mqttPublished(void* response) {    
}
/*end wifi mqtt*/

/*start wifi rest*/
void restWifiCb(void* response) {
    uint32_t status;
    RESPONSE res(response);
    
    if(res.getArgc() == 1) {
        res.popArgs((uint8_t*)&status,4);
        if(status == STATION_GOT_IP) {
            DBG.printf("WIFI Connected\r\n");
            wifiConnected = true;
        }
        else {
            wifiConnected = false;    
        }
    }
}
void rxInterrupt(void) {
    char c;
    
    while(_ESP.readable()) {
        c = _ESP.getc();
        if(c != 0) {    //char is not null
            rxBuf += c;
        }
    }
}
void checkRxBuffer(void) {
    //check new command
    if(rxBuf.rfind("/command") != std::string::npos) {
        rxBuf.erase(rxBuf.begin(),rxBuf.begin()+rxBuf.rfind("/command"));
        if(rxBuf.find("[{") != std::string::npos && rxBuf.find("}]") != std::string::npos) {
            rxBuf.erase(rxBuf.begin(),rxBuf.begin()+rxBuf.find("[{")+1);
            rxBuf.erase(rxBuf.begin()+rxBuf.find("]"),rxBuf.end());
            globalCommand = rxBuf;
            //DBG.printf("gC:%s\r\n",globalCommand.c_str());
            newCommand = true;
        }
    }
    
    //clear rxBuf
    rxBuf.clear();
}
/*end wifi rest*/

/*start eth mqtt*/
void ethMQTTMessageArrived(MQTT::MessageData& md) {
    MQTT::Message &message = md.message;
    DBG.printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\r\n",
    message.qos, message.retained, message.dup, message.id);
    DBG.printf("Payload: %.*s\r\n", message.payloadlen, (char*)message.payload);
    //DBG.printf("Payload %s\r\n",message.payload);
    
    
    //check whether cmd is json
    //char r[255];
    char *s = (char*)message.payload;
    string sp(s);
    //sprintf(s,"%.*s",message.payloadlen, (char*)message.payload);
    //sprintf(globCmd,"%s",s);
    //DBG.printf("Payload: %s\r\n", r);
    //string cmd = r;
    //globalCommand = cmd;
    globalCommand = sp;
    //globCmd = (char*)message.payload;
    //string globCmd((char*)message.payload);
    //std::string *sp = static_cast<std::char*>(message.payload);
    //string sp((char*)message.payload);
    DBG.printf("String: %s\r\n",sp.c_str());
    //globCmd = sp;
    
    newCommand = true;
    /*
    if(cmd.find("[") != std::string::npos && cmd.find("]") != std::string::npos) {
        cmd.erase(cmd.begin(),cmd.begin()+cmd.find("[")+1);
        cmd.erase(cmd.begin()+cmd.find("]"),cmd.end());
        globalCommand = cmd;
        newCommand = true;
    }
    */
}

int ethMQTTConnect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) {
    //char hostname[] = "q.thingfabric.com";
    //char hostname[] = "192.168.131.200";
    //int rc = ipstack->connect(hostname, MQTT_PORT);
    int rc = ipstack->connect(MQTT_HOST, MQTT_PORT);
    
    if(rc!=0)
        return rc;
        
    //MQTT Connect
    //char clientId[] = "emma/0674ff575349896767072538";
    char clientId [32];
    sprintf(clientId,"emma/%s",emmaUID.c_str());
    //DBG.printf("clientId:%s\r\n",clientId);
    MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
    data.MQTTVersion = 3;
    data.clientID.cstring = clientId;
    data.username.cstring = "761b233e-a49a-4830-a8ae-87cec3dc1086";
    data.password.cstring = "ef25cf4567fbc07113252f8d72b7faf2";
    
    if((rc = client->connect(&data)) == 0) {
        DBG.printf("connected\r\n");
    }
    
    //MQTT Subscribe
    //char* topic = "gaisbwqreqrfxjc/0674ff575349896767072538/command";
    char s[64];
    sprintf(s,"%s/%s/command",platformDOMAIN.c_str(),emmaUID.c_str());
    string topic = s;
    //DBG.printf("topic:%s\r\n",topic.c_str());
    if((rc=client->subscribe(topic.c_str(),MQTT::QOS0,ethMQTTMessageArrived)) == 0) {
        DBG.printf("subscribe success!\r\n");    
    }
    return rc;
}
void ethMQTTAttemptConnect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) {
    int retryAttempt = 0;
    
    while(!ipstack->getEth().linkstatus()) {
        DBG.printf("Ethernet link not present. Check cable connection\r\n");
        wait(1);    
    }
    
    while(ethMQTTConnect(client,ipstack) != 0) {
        int timeout = 3;
        DBG.printf("Retry attempt number %d waiting %d\r\n", retryAttempt, timeout);
        wait(timeout);
        retryAttempt++;
    }
}
/*end eth mqtt*/

/*start emma settings*/
string getUID(void) {
    char s[32];
    unsigned long *unique = (unsigned long *)BASE_ADDR;
    sprintf(s,"%08x%08x%08x",unique[0], unique[1], unique[2]);
    return s;    
}

string readSetting(string parameter) {
    FILE *fp;
    signed char c;
    int i=0;
    char s[64];
    string strS;
    
    sprintf(s,"/sd/settings/%s.txt",parameter.c_str());
    
    fp = fopen(s,"r");
    memset(s,0,sizeof(s));
    if(fp != NULL) {
        while(1) {
            c = fgetc(fp);
            if(c == EOF){
                break;
            }
            s[i] = c;
            i++;
        }
        strS = s;
        if(strS.find("(") != std::string::npos && strS.find(")") != std::string::npos) {
            strS.erase(strS.begin(),strS.begin()+strS.find("(")+1);
            strS.erase(strS.begin()+strS.find(")"),strS.end());
        } else {
            strS = "";    
        }
    }
    fclose(fp);
    return strS;    
}

bool writeSetting(string parameter, string value) {
    FILE *fp;
    char s[255];
    
    sprintf(s,"/sd/settings/%s.txt",parameter.c_str());
    fp = fopen(s,"w");
    if(fp != NULL) {
        fprintf(fp,value.c_str());
        fclose(fp);
        return true;
    }
    return false;
}
/*end emma settings*/

/*start emma node*/
string readNodeIP(string macAddr) {
    FILE *fp;
    signed char c;
    int i=0;
    char s[64];
    string strS;
    
    sprintf(s,"/sd/nodeList/%s/nodeIP.txt",macAddr.c_str());
    
    fp = fopen(s,"r");
    memset(s,0,sizeof(s));
    if(fp != NULL) {
        while(1) {
            c = fgetc(fp);
            if(c == EOF){
                break;
            }
            s[i] = c;
            i++;
        }
        strS = s;
        if(strS.find("(") != std::string::npos && strS.find(")") != std::string::npos) {
            strS.erase(strS.begin(),strS.begin()+strS.find("(")+1);
            strS.erase(strS.begin()+strS.find(")"),strS.end());
        } else {
            strS = "";    
        }
    }
    fclose(fp);
    return strS;
}

string readNodeCmd(string dType, string cmd) {
    FILE *fp;
    signed char c;
    int i=0;
    char s[128];
    string strS;
    
    sprintf(s,"/sd/nodeCode/%s/%s.txt",dType.c_str(),cmd.c_str());
    
    fp = fopen(s,"r");
    memset(s,0,sizeof(s));
    if(fp != NULL) {
        while(1) {
            c = fgetc(fp);
            if(c == EOF){
                break;
            }
            s[i] = c;
            i++;
        }
        strS = s;
        if(strS.find("(") != std::string::npos && strS.find(")") != std::string::npos) {
            strS.erase(strS.begin(),strS.begin()+strS.find("(")+1);
            strS.erase(strS.begin()+strS.find(")"),strS.end());
        } else {
            strS = "";    
        }
    }
    fclose(fp);
    return strS;    
}

string *readNodeList(void) {
    static string nd[10];   //max node
    DIR *d;
    struct dirent *p;
    string q;
    int i=0;
    
    d = opendir("/sd/nodeList");
    if(d != NULL) {
        while((p = readdir(d)) != NULL) {
            q = p->d_name;
            nd[i] = q;
            i++;    
        }    
    }
    closedir(d);
    return nd;
}

string wifiGetNodeTemp(string macAddr) {
    int trial=0;
    string nodeIP = readNodeIP(macAddr);
    string str;
    string temp = "0";
    
    if(rest.begin(nodeIP.c_str(),REMOTE_TCP_PORT,false)) {
        while(1) {
            char rcv[256] = {};
            rest.get("/","<?xml version=\"1.0\" encoding=\"utf-8\"?><app_cmd cmd=\"2\"/>\r\n");
            rest.getResponse(rcv,sizeof(rcv));
            str = rcv;
            if(str.find("temp=") != std::string::npos) {
                str.erase(str.begin(),str.begin()+str.find("temp=")+6);
                str.erase(str.begin()+str.find("\""),str.end());
                temp = str;
                break;
            }
            if(trial>1) {   //three times trial
                break;    
            }
            trial++;
            wait(2);
        }
    }
    return temp;
}
/*end emma node*/

/*start emma connection function*/
string ethGET(string host, int port, string url) {
    char buf[1024];
    char s[256];
    int ret;
    TCPSocketConnection sock;
    Timer t;
    
    sprintf(s,"%s",url.c_str());
    sock.connect(host.c_str(),port);
    sock.send_all(s,sizeof(s)-1);
    wait(2);
    
    //receive return
    t.start();
    while(1) {
        ret = sock.receive(buf, sizeof(buf));
        if(ret<=0 || t.read_ms() > 10000) {
            t.stop();
            break;
        }    
    }
    sock.close();
    return buf;
}
/*end emma connection function*/

/*start emma private function*/
void connectedIface(void) { //WARNING: should be run in emmaModeRegister and emmaModeOperation
    char s[512];
    int connPort;
    string connHost;
    string str;
    Timer t;
    
    //wifi interface
    if(wifiAvailable) {
        _ESP.printf("MODE=B");
        if(useProxy) {
            connHost = proxySERVER;
            sscanf(proxyPORT.c_str(),"%d",&connPort);
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"http://%s:%d/emma/api/controller/test HTTP/1.0\nHost: %s\r\n\r\n",EMMA_SERVER_HOST,EMMA_SERVER_PORT,EMMA_SERVER_HOST);
        } else {
            connHost = EMMA_SERVER_HOST;
            connPort = EMMA_SERVER_PORT;
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"/emma/api/controller/test");
        }
        wait(1);
        t.start();
        while(!esp.ready() && t.read_ms() < 5000);
        t.stop();
        if(rest.begin(connHost.c_str(),connPort,false)) {
            //DBG.printf("rest begin\r\n");
            esp.process();
            rest.get(s);
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            rest.getResponse(s,sizeof(s));
            str = s;
            //DBG.printf("response:%s\r\n",s);
            if(str.find("OK") != std::string::npos) {
                wifiConnected = true;
            }
        } else {
            wifiConnected = false;    
        }
    } else {
        wifiConnected = false;    
    }
    
    //eth interface
    if(ethAvailable) {
        if(useProxy) {
            connHost = proxySERVER;
            sscanf(proxyPORT.c_str(),"%d",&connPort);
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            sprintf(s,"GET http://%s:%d/emma/api/web/test HTTP/1.0\nHost: %s\r\n\r\n",EMMA_SERVER_HOST,EMMA_SERVER_PORT,EMMA_SERVER_HOST);
        } else {
            connHost = EMMA_SERVER_HOST;
            connPort = EMMA_SERVER_PORT;
            for(int i=0; i<sizeof(s); i++) {
                s[i]=0; }
            strcpy(s,"GET /emma/api/web/test HTTP/1.0\nHost: %s\r\n\r\n");
        }
        
        t.start();
        while(1) {
            str = ethGET(connHost,connPort,s);
            if(str.find("OK") != std::string::npos) {
                t.stop();
                ethConnected = true;
                break;    
            }
            if(t.read_ms() > 5000) {
                t.stop();
                ethConnected = false;
                break;    
            }
        }
    } else {
        ethConnected = false;    
    }
    
    //gprs interface    
}

void addChar(char *s, char c) {
    uint16_t k;     //customized for EMS
    k = strlen(s);
    s[k] = c;
    s[k + 1] = 0;
}

void rcvReply(char *r, int to) {
    Timer t;
    bool ended = false;
    char c;
    
    strcpy(r,"");
    t.start();
    while(!ended) {
        if(_ESP.readable()) {
            c = _ESP.getc();
            addChar(r,c);
            t.start();
        }
        if(t.read_ms() > to) {
            ended = true;    
        }    
    }
    addChar(r, 0x00);    
}

string calculateMD5(string text) {
    char s[64];
    memset(s,0,sizeof(s));  //for unknown reason, after reading UID, the 's' will contaion UID data
    uint8_t hash[16];
    MD5::computeHash(hash, (uint8_t*)text.c_str(), strlen(text.c_str()));
    for(int i=0; i<16; ++i) {
        sprintf(s,"%s%02x",s,hash[i]);
    }
    return s;
}

bool writeFirmwareHexToChar(string value) {
    FILE *fp;
    char s[32];
    int number;
    string chunk;
    
    sprintf(s,"/sd/newFirmware/firmware.bin");
    fp = fopen(s,"a");
    if(fp != NULL) {
        for(int ch=0; ch<value.size(); ch+=2) {
            chunk = value.substr(ch,2);
            sscanf(chunk.c_str(),"%x",&number);
            fprintf(fp,"%c",number);
        }
        fclose(fp);
        return true;
    }
    return false;
}

bool clearFirmware(void) {
    FILE *fp;
    char s[32];
    
    sprintf(s,"/sd/newFirmware/firmware.bin");
    fp = fopen(s,"w");
    if(fp != NULL) {
        fprintf(fp,"");
        fclose(fp);
        return true;
    }
    return false;
}
/*end emma private function*/