LD100_example.cpp

00001 #include "dot_util.h"
00002 #include "RadioEvent.h"
00003 #include "LD100_util.h"
00004  
00005 #if ACTIVE_EXAMPLE == LD100_EXAMPLE
00006 
00007 /////////////////////////////////////////////////////////////////////////////
00008 // -------------------- DOT LIBRARY REQUIRED ------------------------------//
00009 // * Because these example programs can be used for both mDot and xDot     //
00010 //     devices, the LoRa stack is not included. The libmDot library should //
00011 //     be imported if building for mDot devices. The libxDot library       //
00012 //     should be imported if building for xDot devices.                    //
00013 // * https://developer.mbed.org/teams/MultiTech/code/libmDot-dev-mbed5/    //
00014 // * https://developer.mbed.org/teams/MultiTech/code/libmDot-mbed5/        //
00015 // * https://developer.mbed.org/teams/MultiTech/code/libxDot-dev-mbed5/    //
00016 // * https://developer.mbed.org/teams/MultiTech/code/libxDot-mbed5/        //
00017 /////////////////////////////////////////////////////////////////////////////
00018 
00019 /////////////////////////////////////////////////////////////
00020 // * these options must match the settings on your gateway //
00021 // * edit their values to match your configuration         //
00022 // * frequency sub band is only relevant for the 915 bands //
00023 // * either the network name and passphrase can be used or //
00024 //     the network ID (8 bytes) and KEY (16 bytes)         //
00025 /////////////////////////////////////////////////////////////
00026 static std::string network_name = "MTCDT-18446018";
00027 static std::string network_passphrase = "jointech_passphrase";
00028 static uint8_t network_id[] = { 0x57, 0xD7, 0x64, 0xA4, 0x0C, 0xFE, 0xB1, 0xDF };
00029 static uint8_t network_key[] = { 0x63, 0x81, 0x87, 0x8D, 0x11, 0x45, 0x88, 0x13, 0x30, 0xCF, 0xCF, 0xBC, 0x1D, 0x48, 0xA8, 0xEC };
00030 static uint8_t frequency_sub_band = 2;
00031 static lora::NetworkType network_type = lora::PUBLIC_LORAWAN;
00032 static uint8_t join_delay = 5;
00033 static uint8_t ack = 0;
00034 static bool adr = true;
00035 
00036 // deepsleep consumes slightly less current than sleep
00037 // in sleep mode, IO state is maintained, RAM is retained, and application will resume after waking up
00038 // in deepsleep mode, IOs float, RAM is lost, and application will start from beginning after waking up
00039 // if deep_sleep == true, device will enter deepsleep mode
00040 static bool deep_sleep = false;
00041 
00042 mDot* dot = NULL;
00043 lora::ChannelPlan* plan = NULL;
00044 
00045 Serial pc(USBTX, USBRX);
00046 
00047 void ReadBatteryLevelAndSend()
00048 // get some dummy data and send it to the gateway
00049 {
00050    std::vector<uint8_t> tx_data;
00051    AnalogIn adc_batt(A2); 
00052    float    voltage;
00053    uint16_t u16_read;
00054    uint8_t  u8_send;
00055    u16_read = adc_batt.read_u16();   // read ADC value
00056    voltage = u16_read / 65535.0 * 3.3 * 2;  //convert to voltage level
00057    u8_send = voltage * 10;  //use integer and 1 digit of decimal number
00058    logInfo("Battery Level: Voltage:%f [ADC:%u], Upload Value:%d(0x%x)", voltage, (int)u16_read, (int)u8_send, (int)u8_send);
00059    tx_data.push_back(u8_send);
00060    dot->setAppPort(10);   //give a port number to distinglish data source
00061    send_data(tx_data);
00062 }
00063 
00064 uint16_t modbus_crc16(const uint8_t *buf, int length) {
00065  uint16_t crc = 0xFFFF;
00066  int i,j;
00067  uint8_t LSB;
00068  for (i = 0; i < length; i++) {
00069   crc ^= buf[i];
00070   for (j = 0; j < 8; j++) {
00071    LSB= crc & 1;
00072    crc = crc >> 1;
00073    if (LSB) {
00074     crc ^= 0xA001;
00075    }
00076   }
00077  }
00078  return crc;
00079 }
00080 
00081 #define RS485_BAUDRATE          9600
00082 #define RS485_BITS              8
00083 #define RS485_PARITY            mbed::SerialBase::None
00084 #define RS485_STOPBITS          1
00085 #define RS485_BTYETIME_MS       1
00086 #define RS485_BTYETIME_US       1042
00087 const  int buffer_size = 256;
00088 uint8_t buffer[buffer_size];
00089 
00090 
00091 void ReadRS485SensorAndSend()
00092 // get some dummy data and send it to the gateway
00093 {
00094    std::vector<uint8_t> tx_data;
00095 
00096    
00097    DigitalOut rs485RWctl(PA_11);
00098    Serial rs485(SERIAL_TX, SERIAL_RX);   
00099    
00100    rs485RWctl = 0; //set low to stay in receiver mode
00101    rs485.baud(RS485_BAUDRATE);
00102    rs485.format(RS485_BITS, RS485_PARITY , RS485_STOPBITS);   
00103    //clear modbus buffer
00104    {
00105    Timer t;
00106    t.reset(); t.start();
00107    int timeup_ms = RS485_BTYETIME_MS * 4;    // let Modbus Frame Time Out
00108    while (t.read_ms() < timeup_ms)
00109       {
00110       if (rs485.readable())
00111           {
00112           timeup_ms = RS485_BTYETIME_MS * 3;   // modbus frame timeout
00113           rs485.getc();
00114           t.reset();  
00115           }
00116       }
00117    t.stop();   
00118    }
00119    
00120    //sent Modbus command  
00121    {
00122    int      trans_count = 0;    
00123    uint16_t crc16; 
00124    buffer[0]= 0x0A; //Addr
00125    buffer[1]= 0x04; //Func
00126    buffer[2]= 0x00; //Register (High Byte)     
00127    buffer[3]= 0x01; //Register (Low Byte)      
00128    buffer[4]= 0x00; //Quantity (High Byte)     
00129    buffer[5]= 10;   //Quantity (Low Byte)        
00130    crc16 = modbus_crc16(buffer, 6);
00131    buffer[6]= (crc16) & 0x00FF;  //CRC16 (Low Byte)
00132    buffer[7]= (crc16 >> 8) & 0x00FF;  //CRC16 (High Byte)
00133 
00134    rs485RWctl = 1; //set high to swtich to transmitor mode
00135    while ( trans_count < 8)
00136     {
00137     if (rs485.writable())
00138       {
00139       rs485.putc(buffer[trans_count]);
00140       trans_count++;
00141       wait_ms(RS485_BTYETIME_MS); 
00142       }
00143     }
00144    wait_ms(RS485_BTYETIME_MS * 2);    // let last byte transmit completely
00145    rs485RWctl = 0; //set low to switch back receiver mode
00146    logDebug("Send a Modbus command to RS485"); 
00147    }   
00148    
00149    //retrieve Modbus Data 
00150    {
00151    Timer t;
00152    t.reset();  t.start();
00153    int timeup_ms = 200;    // modbus command timeout, depend on devices
00154    int hasReceivedBytes = 0;
00155    int receivedBytes = 0;
00156         
00157    while (t.read_ms() < timeup_ms)
00158       {
00159       if (rs485.readable())
00160           {
00161           timeup_ms = RS485_BTYETIME_MS * 3;   // modbus frame timeout
00162           t.reset();  
00163           buffer[receivedBytes] =  rs485.getc();
00164           receivedBytes++;
00165           hasReceivedBytes ++;
00166           }
00167       }
00168    t.stop();   
00169    if ( hasReceivedBytes > 2)
00170       {
00171       uint16_t crc16; 
00172       crc16 = modbus_crc16(buffer, hasReceivedBytes -2 );
00173       if ( (buffer[hasReceivedBytes - 1] == ((crc16 >> 8) & 0x00FF)) &&
00174            (buffer[hasReceivedBytes - 2] == ((crc16 ) & 0x00FF)) )
00175           {
00176           logDebug("Received Modbus %d bytes correctly", hasReceivedBytes);
00177           logInfo("Received Modbus Data:%s", mts::Text::bin2hexString(buffer,hasReceivedBytes).c_str());       
00178           if (( buffer[0] == 0x0A) &&  ( buffer[1]== 0x04) && ( buffer[2]== 20))
00179             {
00180             // send data to LoRaWAN gateway
00181             tx_data.push_back(buffer[3]);  //temperature high byte
00182             tx_data.push_back(buffer[4]);  //temperature low byte
00183             tx_data.push_back(buffer[9]);  //Vibration X RMS high byte
00184             tx_data.push_back(buffer[10]);  //Vibration X RAS low byte
00185             tx_data.push_back(buffer[11]);  //Vibration Y RMS high byte
00186             tx_data.push_back(buffer[12]);  //Vibration Y RAS low byte
00187             tx_data.push_back(buffer[13]);  //Vibration Z RMS high byte
00188             tx_data.push_back(buffer[14]); //Vibration Z RMS low byte
00189             tx_data.push_back(buffer[21]); //Power Line Freq high byte
00190             tx_data.push_back(buffer[22]); //Power Line Freq low byte
00191             logInfo("Sent 10 bytes Data to LoraWAN Gateway");
00192             dot->setAppPort(11);   //give a port number to distinglish data source
00193             send_data(tx_data);
00194             logDebug("Sent Data to LoraWAN Gateway finished");
00195             }
00196           else
00197             logDebug("Received Modbus Frame is not sensor data");
00198           }
00199       else
00200           {
00201           logDebug("Received Modbus Frame CRC error");
00202           logDebug("Received Modbus Data:%s", mts::Text::bin2hexString(buffer,hasReceivedBytes).c_str());               
00203           }
00204        }
00205     else
00206        {
00207        if (0 == hasReceivedBytes)
00208            logDebug("Modbus Command Timeout");
00209        else    
00210            logDebug("Received Modbus Frame Error");
00211        }
00212    }
00213 }
00214 
00215 int main() {
00216     // Custom event handler for automatically displaying RX data
00217     RadioEvent events;
00218 
00219     pc.baud(115200);
00220 
00221 #if defined(TARGET_XDOT_L151CC)
00222     i2c.frequency(400000);
00223 #endif
00224 
00225     mts::MTSLog::setLogLevel(mts::MTSLog::TRACE_LEVEL);
00226     
00227 #if CHANNEL_PLAN == CP_US915
00228     plan = new lora::ChannelPlan_US915();
00229 #elif CHANNEL_PLAN == CP_AU915
00230     plan = new lora::ChannelPlan_AU915();
00231 #elif CHANNEL_PLAN == CP_EU868
00232     plan = new lora::ChannelPlan_EU868();
00233 #elif CHANNEL_PLAN == CP_KR920
00234     plan = new lora::ChannelPlan_KR920();
00235 #elif CHANNEL_PLAN == CP_AS923
00236     plan = new lora::ChannelPlan_AS923();
00237 #elif CHANNEL_PLAN == CP_AS923_JAPAN
00238     plan = new lora::ChannelPlan_AS923_Japan();
00239 #elif CHANNEL_PLAN == CP_IN865
00240     plan = new lora::ChannelPlan_IN865();
00241 #endif
00242     assert(plan);
00243 
00244     dot = mDot::getInstance(plan);
00245     assert(dot);
00246 
00247     // attach the custom events handler
00248     dot->setEvents(&events);
00249 
00250     if (!dot->getStandbyFlag()) {
00251         logInfo("mbed-os library version: %d.%d.%d", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
00252 
00253         // start from a well-known state
00254         logInfo("defaulting Dot configuration");
00255         dot->resetConfig();
00256         dot->resetNetworkSession();
00257 
00258         // make sure library logging is turned on
00259         dot->setLogLevel(mts::MTSLog::INFO_LEVEL);
00260 
00261         // update configuration if necessary
00262         if (dot->getJoinMode() != mDot::OTA) {
00263             logInfo("changing network join mode to OTA");
00264             if (dot->setJoinMode(mDot::OTA) != mDot::MDOT_OK) {
00265                 logError("failed to set network join mode to OTA");
00266             }
00267         }
00268         // in OTA and AUTO_OTA join modes, the credentials can be passed to the library as a name and passphrase or an ID and KEY
00269         // only one method or the other should be used!
00270         // network ID = crc64(network name)
00271         // network KEY = cmac(network passphrase)
00272         //update_ota_config_name_phrase(network_name, network_passphrase, frequency_sub_band, network_type, ack);
00273         update_ota_config_id_key(network_id, network_key, frequency_sub_band, network_type, ack);
00274 
00275         // configure network link checks
00276         // network link checks are a good alternative to requiring the gateway to ACK every packet and should allow a single gateway to handle more Dots
00277         // check the link every count packets
00278         // declare the Dot disconnected after threshold failed link checks
00279         // for count = 3 and threshold = 5, the Dot will ask for a link check response every 5 packets and will consider the connection lost if it fails to receive 3 responses in a row
00280         update_network_link_check_config(3, 5);
00281 
00282         // enable or disable Adaptive Data Rate
00283         dot->setAdr(adr);
00284 
00285         // Configure the join delay
00286         dot->setJoinDelay(join_delay);
00287 
00288         // save changes to configuration
00289         logInfo("saving configuration");
00290         if (!dot->saveConfig()) {
00291             logError("failed to save configuration");
00292         }
00293 
00294         // display configuration
00295         display_config();
00296     } else {
00297         // restore the saved session if the dot woke from deepsleep mode
00298         // useful to use with deepsleep because session info is otherwise lost when the dot enters deepsleep
00299         logInfo("restoring network session from NVM");
00300         dot->restoreNetworkSession();
00301     }
00302 
00303     dot->setLogLevel(mts::MTSLog::DEBUG_LEVEL);
00304     TCA6424_init();
00305 
00306     while (true) {
00307         LED_D6(true);
00308 
00309         
00310         LED_D5(true);                
00311         // join network if not joined
00312         if (!dot->getNetworkJoinStatus()) {
00313             join_network();
00314         }
00315         LED_D5(false);
00316         
00317         LED_D4(true);                
00318         // Read Sensor Data and Upload it to gateway
00319 //        mts::MTSLog::setLogLevel(mts::MTSLog::DEBUG_LEVEL); // enable debug log
00320 //       ReadBatteryLevelAndSend();
00321         ReadRS485SensorAndSend();
00322         LED_D4(false);        
00323 
00324         // if going into deepsleep mode, save the session so we don't need to join again after waking up
00325         // not necessary if going into sleep mode since RAM is retained
00326         if (deep_sleep) {
00327             logInfo("saving network session to NVM");
00328             dot->saveNetworkSession();
00329         }
00330         
00331         LED_D6(false);
00332 
00333         // ONLY ONE of the three functions below should be uncommented depending on the desired wakeup method
00334         //sleep_wake_rtc_only(deep_sleep);
00335         //sleep_wake_interrupt_only(deep_sleep);
00336         sleep_wake_rtc_or_interrupt(deep_sleep);
00337     }
00338  
00339     return 0;
00340 }
00341 
00342 #endif