IBM Watson IoT / Mbed OS IBMIoTClientEthernetExample

Contains example code to connect the mbed LPC1768 or FRDM-K64F devices to the IBM Internet of Things Cloud service via ethernet.

Dependencies:   C12832 MQTT LM75B MMA7660

Dependents:   MFT_IoT_demo_USB400 IBM_RFID

main.cpp@10:0b5e0dfee08e, 2014-10-20 (annotated)

Committer:
chris
Date:
Mon Oct 20 14:37:33 2014 +0000
Revision:
10:0b5e0dfee08e
Parent:
9:58eb378727d9
Child:
11:7a6df9a2dcdc
Added a new menu item to display the software revision

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samdanbury 6:37b6d0d56190 1 /*******************************************************************************
samdanbury 6:37b6d0d56190 2 * Copyright (c) 2014 IBM Corp.
samdanbury 6:37b6d0d56190 3 *
samdanbury 6:37b6d0d56190 4 * All rights reserved. This program and the accompanying materials
samdanbury 6:37b6d0d56190 5 * are made available under the terms of the Eclipse Public License v1.0
samdanbury 6:37b6d0d56190 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
samdanbury 6:37b6d0d56190 7 *
samdanbury 6:37b6d0d56190 8 * The Eclipse Public License is available at
samdanbury 6:37b6d0d56190 9 * http://www.eclipse.org/legal/epl-v10.html
samdanbury 6:37b6d0d56190 10 * and the Eclipse Distribution License is available at
samdanbury 6:37b6d0d56190 11 * http://www.eclipse.org/org/documents/edl-v10.php.
samdanbury 6:37b6d0d56190 12 *
samdanbury 6:37b6d0d56190 13 * Contributors:
samdanbury 6:37b6d0d56190 14 * Sam Danbury - initial implementation
samdanbury 6:37b6d0d56190 15 * Ian Craggs - refactoring to remove STL and other changes
icraggs 8:80d49dd91542 16 * Sam Grove - added check for Ethernet cable.
chris 10:0b5e0dfee08e 17 * Chris Styles - Added additional menu screen for software revision
chris 10:0b5e0dfee08e 18 *
chris 10:0b5e0dfee08e 19 * To do :
chris 10:0b5e0dfee08e 20 * Add magnetometer sensor output to IoT data stream
chris 10:0b5e0dfee08e 21 *
samdanbury 6:37b6d0d56190 22 *******************************************************************************/
samdanbury 6:37b6d0d56190 23
samdanbury 6:37b6d0d56190 24 #include "LM75B.h"
samdanbury 6:37b6d0d56190 25 #include "MMA7660.h"
samdanbury 6:37b6d0d56190 26 #include "MQTTClient.h"
samdanbury 6:37b6d0d56190 27 #include "MQTTEthernet.h"
samdanbury 6:37b6d0d56190 28 #include "C12832.h"
samdanbury 6:37b6d0d56190 29 #include "Arial12x12.h"
samdanbury 6:37b6d0d56190 30 #include "rtos.h"
samdanbury 6:37b6d0d56190 31
chris 10:0b5e0dfee08e 32 // Update this to the next number *before* a commit
chris 10:0b5e0dfee08e 33 #define __APP_SW_REVISION__ "10"
chris 10:0b5e0dfee08e 34
samdanbury 6:37b6d0d56190 35 // Configuration values needed to connect to IBM IoT Cloud
icraggs 8:80d49dd91542 36 #define ORG "quickstart" // For a registered connection, replace with your org
icraggs 8:80d49dd91542 37 #define ID "" // For a registered connection, replace with your id
icraggs 8:80d49dd91542 38 #define AUTH_TOKEN "" // For a registered connection, replace with your auth-token
icraggs 8:80d49dd91542 39 #define TYPE DEFAULT_TYPE_NAME // For a registered connection, replace with your type
samdanbury 6:37b6d0d56190 40
samdanbury 6:37b6d0d56190 41 #define MQTT_PORT 1883
samdanbury 6:37b6d0d56190 42 #define MQTT_TLS_PORT 8883
samdanbury 6:37b6d0d56190 43 #define IBM_IOT_PORT MQTT_PORT
samdanbury 6:37b6d0d56190 44
samdanbury 6:37b6d0d56190 45 #define MQTT_MAX_PACKET_SIZE 250
samdanbury 6:37b6d0d56190 46
samdanbury 6:37b6d0d56190 47 #if defined(TARGET_LPC1768)
samdanbury 6:37b6d0d56190 48 #warning "Compiling for mbed LPC1768"
samdanbury 6:37b6d0d56190 49 #include "LPC1768.h"
samdanbury 6:37b6d0d56190 50 #elif defined(TARGET_K64F)
samdanbury 6:37b6d0d56190 51 #warning "Compiling for mbed K64F"
samdanbury 6:37b6d0d56190 52 #include "K64F.h"
samdanbury 6:37b6d0d56190 53 #endif
samdanbury 6:37b6d0d56190 54
icraggs 8:80d49dd91542 55 bool quickstartMode = true;
samdanbury 6:37b6d0d56190 56 char org[11] = ORG;
samdanbury 6:37b6d0d56190 57 char type[30] = TYPE;
samdanbury 6:37b6d0d56190 58 char id[30] = ID; // mac without colons
samdanbury 6:37b6d0d56190 59 char auth_token[30] = AUTH_TOKEN; // Auth_token is only used in non-quickstart mode
samdanbury 6:37b6d0d56190 60
samdanbury 6:37b6d0d56190 61 bool connected = false;
samdanbury 6:37b6d0d56190 62 char* joystickPos = "CENTRE";
samdanbury 6:37b6d0d56190 63 int blink_interval = 0;
samdanbury 6:37b6d0d56190 64
samdanbury 6:37b6d0d56190 65
samdanbury 6:37b6d0d56190 66 void off()
samdanbury 6:37b6d0d56190 67 {
samdanbury 6:37b6d0d56190 68 r = g = b = 1.0; // 1 is off, 0 is full brightness
samdanbury 6:37b6d0d56190 69 }
samdanbury 6:37b6d0d56190 70
samdanbury 6:37b6d0d56190 71 void red()
samdanbury 6:37b6d0d56190 72 {
samdanbury 6:37b6d0d56190 73 r = 0.7; g = 1.0; b = 1.0; // 1 is off, 0 is full brightness
samdanbury 6:37b6d0d56190 74 }
samdanbury 6:37b6d0d56190 75
samdanbury 6:37b6d0d56190 76 void yellow()
samdanbury 6:37b6d0d56190 77 {
samdanbury 6:37b6d0d56190 78 r = 0.7; g = 0.7; b = 1.0; // 1 is off, 0 is full brightness
samdanbury 6:37b6d0d56190 79 }
samdanbury 6:37b6d0d56190 80
samdanbury 6:37b6d0d56190 81 void green()
samdanbury 6:37b6d0d56190 82 {
samdanbury 6:37b6d0d56190 83 r = 1.0; g = 0.7; b = 1.0; // 1 is off, 0 is full brightness
samdanbury 6:37b6d0d56190 84 }
samdanbury 6:37b6d0d56190 85
samdanbury 6:37b6d0d56190 86
samdanbury 6:37b6d0d56190 87 void flashing_yellow(void const *args)
samdanbury 6:37b6d0d56190 88 {
samdanbury 6:37b6d0d56190 89 bool on = false;
samdanbury 6:37b6d0d56190 90 while (!connected) // flashing yellow only while connecting
samdanbury 6:37b6d0d56190 91 {
samdanbury 6:37b6d0d56190 92 on = !on;
samdanbury 6:37b6d0d56190 93 if (on)
samdanbury 6:37b6d0d56190 94 yellow();
samdanbury 6:37b6d0d56190 95 else
samdanbury 6:37b6d0d56190 96 off();
samdanbury 6:37b6d0d56190 97 wait(0.5);
samdanbury 6:37b6d0d56190 98 }
samdanbury 6:37b6d0d56190 99 }
samdanbury 6:37b6d0d56190 100
samdanbury 6:37b6d0d56190 101
samdanbury 6:37b6d0d56190 102 void flashing_red(void const *args) // to be used when the connection is lost
samdanbury 6:37b6d0d56190 103 {
samdanbury 6:37b6d0d56190 104 bool on = false;
samdanbury 6:37b6d0d56190 105 while (!connected)
samdanbury 6:37b6d0d56190 106 {
samdanbury 6:37b6d0d56190 107 on = !on;
samdanbury 6:37b6d0d56190 108 if (on)
samdanbury 6:37b6d0d56190 109 red();
samdanbury 6:37b6d0d56190 110 else
samdanbury 6:37b6d0d56190 111 off();
samdanbury 6:37b6d0d56190 112 wait(2.0);
samdanbury 6:37b6d0d56190 113 }
samdanbury 6:37b6d0d56190 114 }
samdanbury 6:37b6d0d56190 115
samdanbury 6:37b6d0d56190 116
samdanbury 6:37b6d0d56190 117 void printMenu(int menuItem)
samdanbury 6:37b6d0d56190 118 {
samdanbury 6:37b6d0d56190 119 lcd.cls();
samdanbury 6:37b6d0d56190 120 lcd.locate(0,0);
samdanbury 6:37b6d0d56190 121 switch (menuItem)
samdanbury 6:37b6d0d56190 122 {
samdanbury 6:37b6d0d56190 123 case 0:
samdanbury 6:37b6d0d56190 124 lcd.printf("IBM IoT Cloud");
samdanbury 6:37b6d0d56190 125 lcd.locate(0,16);
samdanbury 6:37b6d0d56190 126 lcd.printf("Scroll with joystick");
samdanbury 6:37b6d0d56190 127 break;
samdanbury 6:37b6d0d56190 128 case 1:
samdanbury 6:37b6d0d56190 129 lcd.printf("Go to:");
samdanbury 6:37b6d0d56190 130 lcd.locate(0,16);
samdanbury 6:37b6d0d56190 131 lcd.printf("http://ibm.biz/iotqstart");
samdanbury 6:37b6d0d56190 132 break;
samdanbury 6:37b6d0d56190 133 case 2:
samdanbury 6:37b6d0d56190 134 lcd.printf("Device Identity:");
samdanbury 6:37b6d0d56190 135 lcd.locate(0,16);
samdanbury 6:37b6d0d56190 136 lcd.printf("%s", id);
samdanbury 6:37b6d0d56190 137 break;
samdanbury 6:37b6d0d56190 138 case 3:
samdanbury 6:37b6d0d56190 139 lcd.printf("Status:");
samdanbury 6:37b6d0d56190 140 lcd.locate(0,16);
samdanbury 6:37b6d0d56190 141 lcd.printf(connected ? "Connected" : "Disconnected");
samdanbury 6:37b6d0d56190 142 break;
chris 10:0b5e0dfee08e 143 case 4:
chris 10:0b5e0dfee08e 144 lcd.printf("App version:");
chris 10:0b5e0dfee08e 145 lcd.locate(0,16);
chris 10:0b5e0dfee08e 146 lcd.printf("%s",__APP_SW_REVISION__);
chris 10:0b5e0dfee08e 147 break;
samdanbury 6:37b6d0d56190 148 }
samdanbury 6:37b6d0d56190 149 }
samdanbury 6:37b6d0d56190 150
samdanbury 6:37b6d0d56190 151
samdanbury 6:37b6d0d56190 152 void setMenu()
samdanbury 6:37b6d0d56190 153 {
samdanbury 6:37b6d0d56190 154 static int menuItem = 0;
samdanbury 6:37b6d0d56190 155 if (Down)
samdanbury 6:37b6d0d56190 156 {
samdanbury 6:37b6d0d56190 157 joystickPos = "DOWN";
chris 10:0b5e0dfee08e 158 if (menuItem >= 0 && menuItem < 4)
samdanbury 6:37b6d0d56190 159 printMenu(++menuItem);
samdanbury 6:37b6d0d56190 160 }
samdanbury 6:37b6d0d56190 161 else if (Left)
samdanbury 6:37b6d0d56190 162 joystickPos = "LEFT";
samdanbury 6:37b6d0d56190 163 else if (Click)
samdanbury 6:37b6d0d56190 164 joystickPos = "CLICK";
samdanbury 6:37b6d0d56190 165 else if (Up)
samdanbury 6:37b6d0d56190 166 {
samdanbury 6:37b6d0d56190 167 joystickPos = "UP";
chris 10:0b5e0dfee08e 168 if (menuItem <= 4 && menuItem > 0)
samdanbury 6:37b6d0d56190 169 printMenu(--menuItem);
samdanbury 6:37b6d0d56190 170 }
samdanbury 6:37b6d0d56190 171 else if (Right)
samdanbury 6:37b6d0d56190 172 joystickPos = "RIGHT";
samdanbury 6:37b6d0d56190 173 else
samdanbury 6:37b6d0d56190 174 joystickPos = "CENTRE";
samdanbury 6:37b6d0d56190 175 }
samdanbury 6:37b6d0d56190 176
samdanbury 6:37b6d0d56190 177
samdanbury 6:37b6d0d56190 178 /**
samdanbury 6:37b6d0d56190 179 * Display a message on the LCD screen prefixed with IBM IoT Cloud
samdanbury 6:37b6d0d56190 180 */
samdanbury 6:37b6d0d56190 181 void displayMessage(char* message)
samdanbury 6:37b6d0d56190 182 {
samdanbury 6:37b6d0d56190 183 lcd.cls();
samdanbury 6:37b6d0d56190 184 lcd.locate(0,0);
samdanbury 6:37b6d0d56190 185 lcd.printf("IBM IoT Cloud");
samdanbury 6:37b6d0d56190 186 lcd.locate(0,16);
samdanbury 6:37b6d0d56190 187 lcd.printf(message);
samdanbury 6:37b6d0d56190 188 }
samdanbury 6:37b6d0d56190 189
samdanbury 6:37b6d0d56190 190
samdanbury 6:37b6d0d56190 191 int connect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack)
samdanbury 6:37b6d0d56190 192 {
samdanbury 6:37b6d0d56190 193 const char* iot_ibm = ".messaging.internetofthings.ibmcloud.com";
samdanbury 6:37b6d0d56190 194
samdanbury 6:37b6d0d56190 195 char hostname[strlen(org) + strlen(iot_ibm) + 1];
samdanbury 6:37b6d0d56190 196 sprintf(hostname, "%s%s", org, iot_ibm);
samdanbury 6:37b6d0d56190 197 int rc = ipstack->connect(hostname, IBM_IOT_PORT);
samdanbury 6:37b6d0d56190 198 if (rc != 0)
samdanbury 6:37b6d0d56190 199 return rc;
samdanbury 6:37b6d0d56190 200
samdanbury 6:37b6d0d56190 201 // Construct clientId - d:org:type:id
samdanbury 6:37b6d0d56190 202 char clientId[strlen(org) + strlen(type) + strlen(id) + 5];
samdanbury 6:37b6d0d56190 203 sprintf(clientId, "d:%s:%s:%s", org, type, id);
samdanbury 6:37b6d0d56190 204 DEBUG("clientid is %s\n", clientId);
samdanbury 6:37b6d0d56190 205
samdanbury 6:37b6d0d56190 206 // MQTT Connect
samdanbury 6:37b6d0d56190 207 MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
samdanbury 6:37b6d0d56190 208 data.MQTTVersion = 3;
samdanbury 6:37b6d0d56190 209 data.clientID.cstring = clientId;
samdanbury 6:37b6d0d56190 210
samdanbury 6:37b6d0d56190 211 if (!quickstartMode)
samdanbury 6:37b6d0d56190 212 {
samdanbury 6:37b6d0d56190 213 data.username.cstring = "use-token-auth";
samdanbury 6:37b6d0d56190 214 data.password.cstring = auth_token;
samdanbury 6:37b6d0d56190 215 }
samdanbury 6:37b6d0d56190 216
icraggs 8:80d49dd91542 217 if ((rc = client->connect(data)) == 0)
samdanbury 6:37b6d0d56190 218 {
samdanbury 6:37b6d0d56190 219 connected = true;
samdanbury 6:37b6d0d56190 220 green();
samdanbury 6:37b6d0d56190 221 displayMessage("Connected");
samdanbury 6:37b6d0d56190 222 wait(2);
samdanbury 6:37b6d0d56190 223 displayMessage("Scroll with joystick");
samdanbury 6:37b6d0d56190 224 }
samdanbury 6:37b6d0d56190 225 return rc;
samdanbury 6:37b6d0d56190 226 }
samdanbury 6:37b6d0d56190 227
samdanbury 6:37b6d0d56190 228
samdanbury 6:37b6d0d56190 229 int getConnTimeout(int attemptNumber)
samdanbury 6:37b6d0d56190 230 { // First 10 attempts try within 3 seconds, next 10 attempts retry after every 1 minute
samdanbury 6:37b6d0d56190 231 // after 20 attempts, retry every 10 minutes
samdanbury 6:37b6d0d56190 232 return (attemptNumber < 10) ? 3 : (attemptNumber < 20) ? 60 : 600;
samdanbury 6:37b6d0d56190 233 }
samdanbury 6:37b6d0d56190 234
samdanbury 6:37b6d0d56190 235
samdanbury 6:37b6d0d56190 236 void attemptConnect(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack)
samdanbury 6:37b6d0d56190 237 {
samdanbury 6:37b6d0d56190 238 int retryAttempt = 0;
samdanbury 6:37b6d0d56190 239 connected = false;
icraggs 8:80d49dd91542 240
icraggs 8:80d49dd91542 241 // make sure a cable is connected before starting to connect
icraggs 8:80d49dd91542 242 while (!linkStatus()) {
icraggs 8:80d49dd91542 243 wait(1.0f);
icraggs 8:80d49dd91542 244 WARN("Ethernet link not present. Check cable connection\n");
icraggs 8:80d49dd91542 245 }
samdanbury 6:37b6d0d56190 246
samdanbury 6:37b6d0d56190 247 while (connect(client, ipstack) != 0)
samdanbury 6:37b6d0d56190 248 {
samdanbury 6:37b6d0d56190 249 #if defined(TARGET_K64F)
samdanbury 6:37b6d0d56190 250 red();
samdanbury 6:37b6d0d56190 251 #else
samdanbury 6:37b6d0d56190 252 Thread red_thread(flashing_red);
samdanbury 6:37b6d0d56190 253 #endif
samdanbury 6:37b6d0d56190 254 int timeout = getConnTimeout(++retryAttempt);
samdanbury 6:37b6d0d56190 255 WARN("Retry attempt number %d waiting %d\n", retryAttempt, timeout);
icraggs 8:80d49dd91542 256
icraggs 8:80d49dd91542 257 // if ipstack and client were on the heap we could deconstruct and goto a label where they are constructed
icraggs 8:80d49dd91542 258 // or maybe just add the proper members to do this disconnect and call attemptConnect(...)
icraggs 8:80d49dd91542 259
icraggs 8:80d49dd91542 260 // this works - reset the system when the retry count gets to a threshold
icraggs 8:80d49dd91542 261 if (retryAttempt == 5)
icraggs 8:80d49dd91542 262 NVIC_SystemReset();
icraggs 8:80d49dd91542 263 else
icraggs 8:80d49dd91542 264 wait(timeout);
samdanbury 6:37b6d0d56190 265 }
samdanbury 6:37b6d0d56190 266 }
samdanbury 6:37b6d0d56190 267
samdanbury 6:37b6d0d56190 268
samdanbury 6:37b6d0d56190 269 int publish(MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE>* client, MQTTEthernet* ipstack)
samdanbury 6:37b6d0d56190 270 {
samdanbury 6:37b6d0d56190 271 MQTT::Message message;
samdanbury 6:37b6d0d56190 272 char* pubTopic = "iot-2/evt/status/fmt/json";
samdanbury 6:37b6d0d56190 273
samdanbury 6:37b6d0d56190 274 char buf[250];
samdanbury 6:37b6d0d56190 275 sprintf(buf,
samdanbury 6:37b6d0d56190 276 "{\"d\":{\"myName\":\"IoT mbed\",\"accelX\":%0.4f,\"accelY\":%0.4f,\"accelZ\":%0.4f,\"temp\":%0.4f,\"joystick\":\"%s\",\"potentiometer1\":%0.4f,\"potentiometer2\":%0.4f}}",
samdanbury 6:37b6d0d56190 277 MMA.x(), MMA.y(), MMA.z(), sensor.temp(), joystickPos, ain1.read(), ain2.read());
samdanbury 6:37b6d0d56190 278 message.qos = MQTT::QOS0;
samdanbury 6:37b6d0d56190 279 message.retained = false;
samdanbury 6:37b6d0d56190 280 message.dup = false;
samdanbury 6:37b6d0d56190 281 message.payload = (void*)buf;
samdanbury 6:37b6d0d56190 282 message.payloadlen = strlen(buf);
samdanbury 6:37b6d0d56190 283
samdanbury 6:37b6d0d56190 284 LOG("Publishing %s\n", buf);
icraggs 8:80d49dd91542 285 return client->publish(pubTopic, message);
samdanbury 6:37b6d0d56190 286 }
samdanbury 6:37b6d0d56190 287
samdanbury 6:37b6d0d56190 288
samdanbury 6:37b6d0d56190 289 #if defined(TARGET_K64F)
samdanbury 6:37b6d0d56190 290 int getUUID48(char* buf, int buflen)
samdanbury 6:37b6d0d56190 291 {
samdanbury 6:37b6d0d56190 292 unsigned int UUID_LOC_WORD0 = 0x40048060;
samdanbury 6:37b6d0d56190 293 unsigned int UUID_LOC_WORD1 = 0x4004805C;
samdanbury 6:37b6d0d56190 294
samdanbury 6:37b6d0d56190 295 // Fetch word 0
samdanbury 6:37b6d0d56190 296 uint32_t word0 = *(uint32_t *)UUID_LOC_WORD0;
samdanbury 6:37b6d0d56190 297
samdanbury 6:37b6d0d56190 298 // Fetch word 1
samdanbury 6:37b6d0d56190 299 // we only want bottom 16 bits of word1 (MAC bits 32-47)
samdanbury 6:37b6d0d56190 300 // and bit 9 forced to 1, bit 8 forced to 0
samdanbury 6:37b6d0d56190 301 // Locally administered MAC, reduced conflicts
samdanbury 6:37b6d0d56190 302 // http://en.wikipedia.org/wiki/MAC_address
samdanbury 6:37b6d0d56190 303 uint32_t word1 = *(uint32_t *)UUID_LOC_WORD1;
samdanbury 6:37b6d0d56190 304 word1 |= 0x00000200;
samdanbury 6:37b6d0d56190 305 word1 &= 0x0000FEFF;
samdanbury 6:37b6d0d56190 306
icraggs 9:58eb378727d9 307 int rc = snprintf(buf, buflen, "%4x%08x", word1, word0); // Device id must be in lower case
samdanbury 6:37b6d0d56190 308
samdanbury 6:37b6d0d56190 309 return rc;
samdanbury 6:37b6d0d56190 310 }
samdanbury 6:37b6d0d56190 311 #else
samdanbury 6:37b6d0d56190 312 char* getMac(EthernetInterface& eth, char* buf, int buflen) // Obtain MAC address
samdanbury 6:37b6d0d56190 313 {
samdanbury 6:37b6d0d56190 314 strncpy(buf, eth.getMACAddress(), buflen);
samdanbury 6:37b6d0d56190 315
samdanbury 6:37b6d0d56190 316 char* pos; // Remove colons from mac address
samdanbury 6:37b6d0d56190 317 while ((pos = strchr(buf, ':')) != NULL)
samdanbury 6:37b6d0d56190 318 memmove(pos, pos + 1, strlen(pos) + 1);
samdanbury 6:37b6d0d56190 319 return buf;
samdanbury 6:37b6d0d56190 320 }
samdanbury 6:37b6d0d56190 321 #endif
samdanbury 6:37b6d0d56190 322
samdanbury 6:37b6d0d56190 323
samdanbury 6:37b6d0d56190 324 void messageArrived(MQTT::MessageData& md)
samdanbury 6:37b6d0d56190 325 {
samdanbury 6:37b6d0d56190 326 MQTT::Message &message = md.message;
samdanbury 6:37b6d0d56190 327 char topic[md.topicName.lenstring.len + 1];
samdanbury 6:37b6d0d56190 328
samdanbury 6:37b6d0d56190 329 sprintf(topic, "%.*s", md.topicName.lenstring.len, md.topicName.lenstring.data);
samdanbury 6:37b6d0d56190 330
samdanbury 6:37b6d0d56190 331 LOG("Message arrived on topic %s: %.*s\n", topic, message.payloadlen, message.payload);
samdanbury 6:37b6d0d56190 332
samdanbury 6:37b6d0d56190 333 // Command topic: iot-2/cmd/blink/fmt/json - cmd is the string between cmd/ and /fmt/
samdanbury 6:37b6d0d56190 334 char* start = strstr(topic, "/cmd/") + 5;
samdanbury 6:37b6d0d56190 335 int len = strstr(topic, "/fmt/") - start;
samdanbury 6:37b6d0d56190 336
samdanbury 6:37b6d0d56190 337 if (memcmp(start, "blink", len) == 0)
samdanbury 6:37b6d0d56190 338 {
samdanbury 6:37b6d0d56190 339 char payload[message.payloadlen + 1];
samdanbury 6:37b6d0d56190 340 sprintf(payload, "%.*s", message.payloadlen, (char*)message.payload);
samdanbury 6:37b6d0d56190 341
samdanbury 6:37b6d0d56190 342 char* pos = strchr(payload, '}');
samdanbury 6:37b6d0d56190 343 if (pos != NULL)
samdanbury 6:37b6d0d56190 344 {
samdanbury 6:37b6d0d56190 345 *pos = '\0';
samdanbury 6:37b6d0d56190 346 if ((pos = strchr(payload, ':')) != NULL)
samdanbury 6:37b6d0d56190 347 {
samdanbury 6:37b6d0d56190 348 int blink_rate = atoi(pos + 1);
samdanbury 6:37b6d0d56190 349 blink_interval = (blink_rate <= 0) ? 0 : (blink_rate > 50 ? 1 : 50/blink_rate);
samdanbury 6:37b6d0d56190 350 }
samdanbury 6:37b6d0d56190 351 }
samdanbury 6:37b6d0d56190 352 }
samdanbury 6:37b6d0d56190 353 else
samdanbury 6:37b6d0d56190 354 WARN("Unsupported command: %.*s\n", len, start);
samdanbury 6:37b6d0d56190 355 }
samdanbury 6:37b6d0d56190 356
samdanbury 6:37b6d0d56190 357
samdanbury 6:37b6d0d56190 358 int main()
samdanbury 6:37b6d0d56190 359 {
icraggs 8:80d49dd91542 360 quickstartMode = (strcmp(org, "quickstart") == 0);
icraggs 8:80d49dd91542 361
samdanbury 6:37b6d0d56190 362 lcd.set_font((unsigned char*) Arial12x12); // Set a nice font for the LCD screen
samdanbury 6:37b6d0d56190 363
samdanbury 6:37b6d0d56190 364 led2 = LED2_OFF; // K64F: turn off the main board LED
samdanbury 6:37b6d0d56190 365
samdanbury 6:37b6d0d56190 366 displayMessage("Connecting");
samdanbury 6:37b6d0d56190 367 #if defined(TARGET_K64F)
samdanbury 6:37b6d0d56190 368 yellow(); // Don't flash on the K64F, because starting a thread causes the EthernetInterface init call to hang
samdanbury 6:37b6d0d56190 369 #else
samdanbury 6:37b6d0d56190 370 Thread yellow_thread(flashing_yellow);
samdanbury 6:37b6d0d56190 371 #endif
samdanbury 6:37b6d0d56190 372
samdanbury 6:37b6d0d56190 373 MQTTEthernet ipstack;
samdanbury 6:37b6d0d56190 374 MQTT::Client<MQTTEthernet, Countdown, MQTT_MAX_PACKET_SIZE> client(ipstack);
samdanbury 6:37b6d0d56190 375
samdanbury 6:37b6d0d56190 376 if (quickstartMode)
samdanbury 6:37b6d0d56190 377 {
samdanbury 6:37b6d0d56190 378 #if defined(TARGET_K64F)
samdanbury 6:37b6d0d56190 379 getUUID48(id, sizeof(id)); // getMac doesn't work on the K64F
samdanbury 6:37b6d0d56190 380 #else
samdanbury 6:37b6d0d56190 381 getMac(ipstack.getEth(), id, sizeof(id));
samdanbury 6:37b6d0d56190 382 #endif
samdanbury 6:37b6d0d56190 383 }
samdanbury 6:37b6d0d56190 384
samdanbury 6:37b6d0d56190 385 attemptConnect(&client, &ipstack);
samdanbury 6:37b6d0d56190 386
samdanbury 6:37b6d0d56190 387 if (!quickstartMode)
samdanbury 6:37b6d0d56190 388 {
samdanbury 6:37b6d0d56190 389 int rc = 0;
samdanbury 6:37b6d0d56190 390 if ((rc = client.subscribe("iot-2/cmd/+/fmt/json", MQTT::QOS1, messageArrived)) != 0)
samdanbury 6:37b6d0d56190 391 WARN("rc from MQTT subscribe is %d\n", rc);
samdanbury 6:37b6d0d56190 392 }
samdanbury 6:37b6d0d56190 393
samdanbury 6:37b6d0d56190 394 blink_interval = 0;
samdanbury 6:37b6d0d56190 395 int count = 0;
samdanbury 6:37b6d0d56190 396 while (true)
samdanbury 6:37b6d0d56190 397 {
samdanbury 6:37b6d0d56190 398 if (++count == 100)
samdanbury 6:37b6d0d56190 399 { // Publish a message every second
samdanbury 6:37b6d0d56190 400 if (publish(&client, &ipstack) != 0)
samdanbury 6:37b6d0d56190 401 attemptConnect(&client, &ipstack); // if we have lost the connection
samdanbury 6:37b6d0d56190 402 count = 0;
samdanbury 6:37b6d0d56190 403 }
samdanbury 6:37b6d0d56190 404
samdanbury 6:37b6d0d56190 405 if (blink_interval == 0)
samdanbury 6:37b6d0d56190 406 led2 = LED2_OFF;
samdanbury 6:37b6d0d56190 407 else if (count % blink_interval == 0)
samdanbury 6:37b6d0d56190 408 led2 = !led2;
samdanbury 6:37b6d0d56190 409 if (count % 20 == 0)
samdanbury 6:37b6d0d56190 410 setMenu();
samdanbury 6:37b6d0d56190 411 client.yield(10); // allow the MQTT client to receive messages
samdanbury 6:37b6d0d56190 412 }
samdanbury 6:37b6d0d56190 413 }