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A program for IoT demonstration with mbed, EnOcean and MQTT.
Dependencies: IBMIoTClientEthernetExample C12832 EthernetInterface MQTT USB400Serial USBHost mbed
Fork of IBMIoTClientEthernetExample by
main.cpp
- Committer:
- samdanbury
- Date:
- 2014-07-16
- Revision:
- 0:cae064bcbe5e
- Child:
- 1:1f187285667c
File content as of revision 0:cae064bcbe5e:
/******************************************************************************* * Copyright (c) 2014 IBM Corporation and other Contributors. * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: Sam Danbury * IBM - Initial Contribution *******************************************************************************/ #include "stdio.h" #include "mbed.h" #include "rtos.h" #include "C12832.h" #include "LM75B.h" #include "MMA7660.h" #include "C12832.h" #include "MQTTEthernetIoT.h" #include "MQTTClient.h" #include "ConfigFile.h" #include <string> #include <sstream> #include <algorithm> using namespace std; #ifdef TARGET_LPC1768 #warning "Compiling for mbed LPC1768" LocalFileSystem local("local"); C12832 lcd(p5, p7, p6, p8, p11); DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); MMA7660 MMA(p28, p27); LM75B sensor(p28, p27); DigitalIn Down(p12); DigitalIn Left(p13); DigitalIn Click(p14); DigitalIn Up(p15); DigitalIn Right(p16); AnalogIn ain1(p19); AnalogIn ain2(p20); #elif TARGET_K64F #warning "Compiling for mbed K64F" //#define ORGANISATION "<org>"; //#define TYPE "<type>"; //#define ID "<id>"; //#define AUTHMETHOD "<auth-method>"; //#define AUTHTOKEN "<auth-token>"; C12832 lcd(D11, D13, D12, D7, D10); DigitalOut led1(LED_RED); DigitalOut led2(LED_GREEN); DigitalOut led3(LED_BLUE); MMA7660 MMA(PTE25, PTE24); LM75B sensor(PTE25, PTE24); DigitalIn Up(A2); DigitalIn Down(A3); DigitalIn Right(A4); DigitalIn Left(A5); DigitalIn Click(D4); AnalogIn ain1(A0); AnalogIn ain2(A1); #else LocalFileSystem local("local"); C12832 lcd(D11, D13, D12, D7, D10); DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); MMA7660 MMA(D14, D15); LM75B sensor(D14,D15); DigitalIn Up(A2); DigitalIn Down(A3); DigitalIn Left(A4); DigitalIn Right(A5); DigitalIn Click(D4); AnalogIn ain1 (A0); AnalogIn ain2 (A1); #endif //Joystick string joystickPos; void joystickThread(void const *args); //Commands enum command { blink }; command getCommand (std::string const& command); void messageArrived(MQTT::MessageData& md); int interval; string getUUID48(); //Config void parseConfig(); bool quickstartMode = true; string org = ""; string type = ""; string id = ""; string auth_method = ""; string auth_token = ""; string mac = ""; void parseConfig() { ConfigFile cfg; char value[30]; char value1[30]; char value2[30]; char value3[30]; if (cfg.read("/local/device.cfg")) { quickstartMode = false; if (cfg.getValue("org", value, sizeof(value))) { stringstream ss(value); ss >> org; } if (cfg.getValue("type", value1, sizeof(value1))) { stringstream ss(value1); ss >> type; } if (cfg.getValue("id", value2, sizeof(value2))) { stringstream ss(value2); ss >> id; } if (cfg.getValue("auth-token", value3, sizeof(value3))) { stringstream ss(value3); ss >> auth_token; } } else { quickstartMode = true; org = "quickstart"; type = "iotsample-mbed-lpc1768"; id = mac; } #ifdef TARGET_K64F #ifdef ORGANISATION quickstartMode = false; org = ORGANISATION; #ifdef TYPE type = TYPE; #else lcd.printf("Type is not defined"); #endif #ifdef ID id = ID; #else lcd.printf("ID is not defined"); #endif #ifdef AUTHMETHOD auth_method = AUTHMETHOD; #else lcd.printf("Auth method is not defined"); #endif #ifdef AUTHTOKEN auth_token = AUTHTOKEN; #else lcd.printf("Auth token is not defined"); #endif #endif #endif } int main() { lcd.locate(0,0); lcd.printf("ARM IBM IoT\n"); lcd.printf("Network connecting\n"); //Connect to network MQTTEthernetIoT ipstack = MQTTEthernetIoT(); MQTT::Client<MQTTEthernetIoT, Countdown, 250> client = MQTT::Client<MQTTEthernetIoT, Countdown, 250>(ipstack); //Obtain mac address of mbed #ifdef TARGET_K64F mac = getUUID48(); #else mac = ipstack.getMACAddress(); //Remove colons from mac address mac.erase(remove(mac.begin(), mac.end(), ':'), mac.end()); #endif //Parse config file if present parseConfig(); //TCP Connect lcd.printf("Attempting TCP connect"); string ip = org + ".messaging.internetofthings.ibmcloud.com"; char* hostname = new char[ip.length() + 1]; strcpy(hostname, ip.c_str()); int port = 1883; int rc = ipstack.connect(hostname, port); if (rc != 0) { lcd.printf("TCP connect failed"); } //Construct clientId based on config string str = string("d:") + org + ":" + type + ":" + id; char clientId[str.size()]; memcpy(clientId, str.c_str(), str.size() + 1); //MQTT Connect lcd.cls(); lcd.locate(0,0); lcd.printf("Attempting MQTT Connect\n"); MQTTPacket_connectData data = MQTTPacket_connectData_initializer; data.MQTTVersion = 3; data.clientID.cstring = clientId; if (!quickstartMode) { char* password = new char[auth_token.length() + 1]; strcpy(password, auth_token.c_str()); data.username.cstring = "use-token-auth"; data.password.cstring = password; } if ((rc = client.connect(&data)) != 0) lcd.printf("rc from MQTT connect is %d\n", rc); if (!quickstartMode) { lcd.printf("Attempting MQTT Subscribe\n"); char* subTopic = "iot-2/cmd/+/fmt/json"; if ((rc = client.subscribe(subTopic, MQTT::QOS1, messageArrived)) != 0) lcd.printf("rc from MQTT subscribe is %d\n", rc); } //Initialize lcd lcd.cls(); lcd.locate(0,0); lcd.printf("http://ibm.biz/iotcloud\n"); lcd.printf("Mac address: %s\n", mac); //Start thread to read data from joystick joystickPos = "CENTRE"; Thread jThd(joystickThread); interval = 0; int i = 0; while(1) { //Message published every second if (i == 100) { //MQTT Publish MQTT::Message message; char* pubTopic = "iot-2/evt/status/fmt/json"; char buf[250]; sprintf(buf, "{\"d\":{\"myName\":\"IoT mbed\",\"accelX\":%0.4f,\"accelY\":%0.4f,\"accelZ\":%0.4f,\"temp\":%0.4f,\"joystick\":\"%s\",\"potentiometer1\":%0.4f,\"potentiometer2\":%0.4f}}", MMA.x(), MMA.y(), MMA.z(), sensor.temp(), joystickPos, ain1.read(), ain2.read()); message.qos = MQTT::QOS0; message.retained = false; message.dup = false; message.payload = (void*)buf; message.payloadlen = strlen(buf); if ((rc = client.publish(pubTopic, &message)) != 0) lcd.printf("MQTT publish failed"); i = 0; led1 = !led1; } if (interval == 0) { led2 = 0; } else { if (i%(interval)==0) { led2 = !led2; } } wait(0.01); i++; client.yield(1); } } void messageArrived(MQTT::MessageData& md) { MQTT::Message &message = md.message; char* topic = new char[md.topicName.lenstring.len + 1]; sprintf(topic, "%.*s", md.topicName.lenstring.len, md.topicName.lenstring.data); char* payload = new char[message.payloadlen + 1]; sprintf(payload, "%.*s", message.payloadlen, (char*)message.payload); string topicStr = topic; string payloadStr = payload; //Command topic: iot-2/cmd/blink/fmt/json string cmd = topicStr.substr(10, topicStr.find("/fmt/") - 10); switch(getCommand(cmd)) { case blink: { string str = payloadStr.substr(8, payloadStr.find("}") - 8); int rate = atoi(str.c_str()); if (rate == 0) { interval = 0; } else if (rate > 50) { interval = 1; } else if (rate > 0) { interval = 50/rate; } break; } default: lcd.printf("Unsupported command: %s\n", cmd); } if (topic) { delete[] topic; } if (payload) { delete[] payload; } } command getCommand (string const& command) { if (command == "blink") return blink; } void joystickThread(void const *args) { while (true) { if (Down) joystickPos = "DOWN"; else if (Left) joystickPos = "LEFT"; else if (Click) joystickPos = "CLICK"; else if (Up) joystickPos = "UP"; else if (Right) joystickPos = "RIGHT"; else joystickPos = "CENTRE"; } } string getUUID48 () { unsigned int UUID_LOC_WORD0 = 0x40048060; unsigned int UUID_LOC_WORD1 = 0x4004805C; // Fetch word 0 uint32_t Word0 = *(uint32_t *)UUID_LOC_WORD0; // Fetch word 1 // we only want bottom 16 bits of word1 (MAC bits 32-47) // and bit 9 forced to 1, bit 8 forced to 0 // Locally administered MAC, reduced conflicts // http://en.wikipedia.org/wiki/MAC_address uint32_t Word1 = *(uint32_t *)UUID_LOC_WORD1; Word1 |= 0x00000200; Word1 &= 0x0000FEFF; string sd; char stemp[100] = ""; snprintf(stemp, 100, "%4X%08X", Word1,Word0); // I use the safer version of sprintf() -- snprintf() sd = stemp; // the contents of sd are now "This is a string!" return (sd); }