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Dependencies: C12832 EthernetInterface IBMIoTClientEthernetExample LM75B MMA7660 MQTT iBMrfid mbed-rtos mbed
Fork of IBMIoTClientEthernetExample by
main.cpp
- Committer:
- samdanbury
- Date:
- 2014-08-20
- Revision:
- 7:63a7aa4deaf8
- Parent:
- 6:37b6d0d56190
- Child:
- 8:80d49dd91542
File content as of revision 7:63a7aa4deaf8:
/******************************************************************************* * Copyright (c) 2014 IBM Corp. * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * and Eclipse Distribution License v1.0 which accompany this distribution. * * The Eclipse Public License is available at * http://www.eclipse.org/legal/epl-v10.html * and the Eclipse Distribution License is available at * http://www.eclipse.org/org/documents/edl-v10.php. * * Contributors: * Sam Danbury - initial implementation * Ian Craggs - refactoring to remove STL and other changes *******************************************************************************/ #include "LM75B.h" #include "MMA7660.h" #include "MQTTClient.h" #include "MQTTEthernet.h" #include "C12832.h" #include "Arial12x12.h" #include "rtos.h" // Configuration values needed to connect to IBM IoT Cloud #define QUICKSTARTMODE 1 #if (QUICKSTARTMODE) #define ORG "quickstart" #define ID "" #define AUTH_METHOD "" #define AUTH_TOKEN "" #define TYPE DEFAULT_TYPE_NAME #else #define ORG "Replace with your org" #define ID "Replace with your id" #define TYPE "Replace with your type" #define AUTH_METHOD "Replace with your auth-method" #define AUTH_TOKEN "Replace with your auth-token" #endif #define MQTT_PORT 1883 #define MQTT_TLS_PORT 8883 #define IBM_IOT_PORT MQTT_PORT #define MQTT_MAX_PACKET_SIZE 250 #if defined(TARGET_LPC1768) #warning "Compiling for mbed LPC1768" #include "LPC1768.h" #elif defined(TARGET_K64F) #warning "Compiling for mbed K64F" #include "K64F.h" #endif bool quickstartMode = (QUICKSTARTMODE) ? true : false; char org[11] = ORG; char type[30] = TYPE; char id[30] = ID; // mac without colons char auth_token[30] = AUTH_TOKEN; // Auth_token is only used in non-quickstart mode bool connected = false; char* joystickPos = "CENTRE"; int blink_interval = 0; void off() { r = g = b = 1.0; // 1 is off, 0 is full brightness } void red() { r = 0.7; g = 1.0; b = 1.0; // 1 is off, 0 is full brightness } void yellow() { r = 0.7; g = 0.7; b = 1.0; // 1 is off, 0 is full brightness } void green() { r = 1.0; g = 0.7; b = 1.0; // 1 is off, 0 is full brightness } void flashing_yellow(void const *args) { bool on = false; while (!connected) // flashing yellow only while connecting { on = !on; if (on) yellow(); else off(); wait(0.5); } } void flashing_red(void const *args) // to be used when the connection is lost { bool on = false; while (!connected) { on = !on; if (on) red(); else off(); wait(2.0); } } void printMenu(int menuItem) { lcd.cls(); lcd.locate(0,0); switch (menuItem) { case 0: lcd.printf("IBM IoT Cloud"); lcd.locate(0,16); lcd.printf("Scroll with joystick"); break; case 1: lcd.printf("Go to:"); lcd.locate(0,16); lcd.printf("http://ibm.biz/iotqstart"); break; case 2: lcd.printf("Device Identity:"); lcd.locate(0,16); lcd.printf("%s", id); break; case 3: lcd.printf("Status:"); lcd.locate(0,16); lcd.printf(connected ? "Connected" : "Disconnected"); break; } } void setMenu() { static int menuItem = 0; if (Down) { joystickPos = "DOWN"; if (menuItem >= 0 && menuItem < 3) printMenu(++menuItem); } else if (Left) joystickPos = "LEFT"; else if (Click) joystickPos = "CLICK"; else if (Up) { joystickPos = "UP"; if (menuItem <= 3 && menuItem > 0) printMenu(--menuItem); } else if (Right) joystickPos = "RIGHT"; else joystickPos = "CENTRE"; } /** * Display a message on the LCD screen prefixed with IBM IoT Cloud */ void displayMessage(char* message) { lcd.cls(); lcd.locate(0,0); lcd.printf("IBM IoT Cloud"); lcd.locate(0,16); lcd.printf(message); } int connect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) { const char* iot_ibm = ".messaging.internetofthings.ibmcloud.com"; char hostname[strlen(org) + strlen(iot_ibm) + 1]; sprintf(hostname, "%s%s", org, iot_ibm); int rc = ipstack->connect(hostname, IBM_IOT_PORT); if (rc != 0) return rc; // Construct clientId - d:org:type:id char clientId[strlen(org) + strlen(type) + strlen(id) + 5]; sprintf(clientId, "d:%s:%s:%s", org, type, id); DEBUG("clientid is %s\n", clientId); // MQTT Connect MQTTPacket_connectData data = MQTTPacket_connectData_initializer; data.MQTTVersion = 3; data.clientID.cstring = clientId; if (!quickstartMode) { data.username.cstring = "use-token-auth"; data.password.cstring = auth_token; } if ((rc = client->connect(&data)) == 0) { connected = true; green(); displayMessage("Connected"); wait(2); displayMessage("Scroll with joystick"); } return rc; } int getConnTimeout(int attemptNumber) { // First 10 attempts try within 3 seconds, next 10 attempts retry after every 1 minute // after 20 attempts, retry every 10 minutes return (attemptNumber < 10) ? 3 : (attemptNumber < 20) ? 60 : 600; } void attemptConnect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) { int retryAttempt = 0; connected = false; while (connect(client, ipstack) != 0) { #if defined(TARGET_K64F) red(); #else Thread red_thread(flashing_red); #endif int timeout = getConnTimeout(++retryAttempt); WARN("Retry attempt number %d waiting %d\n", retryAttempt, timeout); wait(timeout); } } int publish(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack) { 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); LOG("Publishing %s\n", buf); return client->publish(pubTopic, &message); } #if defined(TARGET_K64F) int getUUID48(char* buf, int buflen) { 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; int rc = snprintf(buf, buflen, "%4X%08X", word1, word0); return rc; } #else char* getMac(EthernetInterface& eth, char* buf, int buflen) // Obtain MAC address { strncpy(buf, eth.getMACAddress(), buflen); char* pos; // Remove colons from mac address while ((pos = strchr(buf, ':')) != NULL) memmove(pos, pos + 1, strlen(pos) + 1); return buf; } #endif void messageArrived(MQTT::MessageData& md) { MQTT::Message &message = md.message; char topic[md.topicName.lenstring.len + 1]; sprintf(topic, "%.*s", md.topicName.lenstring.len, md.topicName.lenstring.data); LOG("Message arrived on topic %s: %.*s\n", topic, message.payloadlen, message.payload); // Command topic: iot-2/cmd/blink/fmt/json - cmd is the string between cmd/ and /fmt/ char* start = strstr(topic, "/cmd/") + 5; int len = strstr(topic, "/fmt/") - start; if (memcmp(start, "blink", len) == 0) { char payload[message.payloadlen + 1]; sprintf(payload, "%.*s", message.payloadlen, (char*)message.payload); char* pos = strchr(payload, '}'); if (pos != NULL) { *pos = '\0'; if ((pos = strchr(payload, ':')) != NULL) { int blink_rate = atoi(pos + 1); blink_interval = (blink_rate <= 0) ? 0 : (blink_rate > 50 ? 1 : 50/blink_rate); } } } else WARN("Unsupported command: %.*s\n", len, start); } int main() { lcd.set_font((unsigned char*) Arial12x12); // Set a nice font for the LCD screen led2 = LED2_OFF; // K64F: turn off the main board LED displayMessage("Connecting"); #if defined(TARGET_K64F) yellow(); // Don't flash on the K64F, because starting a thread causes the EthernetInterface init call to hang #else Thread yellow_thread(flashing_yellow); #endif MQTTEthernet ipstack; MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE> client(ipstack); if (quickstartMode) { #if defined(TARGET_K64F) getUUID48(id, sizeof(id)); // getMac doesn't work on the K64F #else getMac(ipstack.getEth(), id, sizeof(id)); #endif } attemptConnect(&client, &ipstack); if (!quickstartMode) { int rc = 0; if ((rc = client.subscribe("iot-2/cmd/+/fmt/json", MQTT::QOS1, messageArrived)) != 0) WARN("rc from MQTT subscribe is %d\n", rc); } blink_interval = 0; int count = 0; while (true) { if (++count == 100) { // Publish a message every second if (publish(&client, &ipstack) != 0) attemptConnect(&client, &ipstack); // if we have lost the connection count = 0; } if (blink_interval == 0) led2 = LED2_OFF; else if (count % blink_interval == 0) led2 = !led2; if (count % 20 == 0) setMenu(); client.yield(10); // allow the MQTT client to receive messages } }