myDevicesIoT / Mbed 2 deprecated Cayenne-WIZ820ioInterface

Example for connecting to Cayenne using the WIZ820ioInterface (W5200) library.

Dependencies:   Cayenne-MQTT-mbed WIZ820ioInterface mbed

main.cpp@7:a96efcf59599, 2016-11-11 (annotated)

Committer:
jburhenn
Date:
Fri Nov 11 18:25:05 2016 +0000
Revision:
7:a96efcf59599
Parent:
4:bf86ca1400b7 
Added comment to explain how to change the interval for publishing data.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jburhenn 0:846ee26b6faa 1 /**
jburhenn 0:846ee26b6faa 2 * Example app for using the Cayenne MQTT C++ library to send and receive example data. This example uses
jburhenn 0:846ee26b6faa 3 * the WIZ820ioInterface library to connect via Ethernet.
jburhenn 0:846ee26b6faa 4 */
jburhenn 0:846ee26b6faa 5
jburhenn 0:846ee26b6faa 6 #include "MQTTTimer.h"
jburhenn 0:846ee26b6faa 7 #include "CayenneMQTTClient.h"
jburhenn 0:846ee26b6faa 8 #include "MQTTNetwork.h"
jburhenn 0:846ee26b6faa 9 #include "WIZ820ioInterface.h"
jburhenn 0:846ee26b6faa 10
jburhenn 2:09f0c27ef315 11 // Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
jburhenn 2:09f0c27ef315 12 char* username = "MQTT_USERNAME";
jburhenn 2:09f0c27ef315 13 char* password = "MQTT_PASSWORD";
jburhenn 2:09f0c27ef315 14 char* clientID = "CLIENT_ID";
jburhenn 2:09f0c27ef315 15
jburhenn 0:846ee26b6faa 16 WIZ820ioInterface interface(D11, D12, D13, D10, D5); // MOSI, MISO, SCK, SEL, Reset
jburhenn 0:846ee26b6faa 17 MQTTNetwork<WIZ820ioInterface> network(interface);
jburhenn 2:09f0c27ef315 18 CayenneMQTT::MQTTClient<MQTTNetwork<WIZ820ioInterface>, MQTTTimer> mqttClient(network, username, password, clientID);
jburhenn 0:846ee26b6faa 19
jburhenn 0:846ee26b6faa 20 /**
jburhenn 0:846ee26b6faa 21 * Print the message info.
jburhenn 0:846ee26b6faa 22 * @param[in] message The message received from the Cayenne server.
jburhenn 0:846ee26b6faa 23 */
jburhenn 2:09f0c27ef315 24 void outputMessage(CayenneMQTT::MessageData& message)
jburhenn 0:846ee26b6faa 25 {
jburhenn 0:846ee26b6faa 26 switch (message.topic) {
jburhenn 0:846ee26b6faa 27 case COMMAND_TOPIC:
jburhenn 0:846ee26b6faa 28 printf("topic=Command");
jburhenn 0:846ee26b6faa 29 break;
jburhenn 0:846ee26b6faa 30 case CONFIG_TOPIC:
jburhenn 0:846ee26b6faa 31 printf("topic=Config");
jburhenn 0:846ee26b6faa 32 break;
jburhenn 0:846ee26b6faa 33 default:
jburhenn 0:846ee26b6faa 34 printf("topic=%d", message.topic);
jburhenn 0:846ee26b6faa 35 break;
jburhenn 0:846ee26b6faa 36 }
jburhenn 0:846ee26b6faa 37 printf(" channel=%d", message.channel);
jburhenn 0:846ee26b6faa 38 if (message.clientID) {
jburhenn 0:846ee26b6faa 39 printf(" clientID=%s", message.clientID);
jburhenn 0:846ee26b6faa 40 }
jburhenn 0:846ee26b6faa 41 if (message.type) {
jburhenn 0:846ee26b6faa 42 printf(" type=%s", message.type);
jburhenn 0:846ee26b6faa 43 }
jburhenn 0:846ee26b6faa 44 for (size_t i = 0; i < message.valueCount; ++i) {
jburhenn 2:09f0c27ef315 45 if (message.getValue(i)) {
jburhenn 2:09f0c27ef315 46 printf(" value=%s", message.getValue(i));
jburhenn 2:09f0c27ef315 47 }
jburhenn 2:09f0c27ef315 48 if (message.getUnit(i)) {
jburhenn 2:09f0c27ef315 49 printf(" unit=%s", message.getUnit(i));
jburhenn 2:09f0c27ef315 50 }
jburhenn 0:846ee26b6faa 51 }
jburhenn 0:846ee26b6faa 52 if (message.id) {
jburhenn 0:846ee26b6faa 53 printf(" id=%s", message.id);
jburhenn 0:846ee26b6faa 54 }
jburhenn 0:846ee26b6faa 55 printf("\n");
jburhenn 0:846ee26b6faa 56 }
jburhenn 0:846ee26b6faa 57
jburhenn 0:846ee26b6faa 58 /**
jburhenn 0:846ee26b6faa 59 * Handle messages received from the Cayenne server.
jburhenn 0:846ee26b6faa 60 * @param[in] message The message received from the Cayenne server.
jburhenn 0:846ee26b6faa 61 */
jburhenn 2:09f0c27ef315 62 void messageArrived(CayenneMQTT::MessageData& message)
jburhenn 0:846ee26b6faa 63 {
jburhenn 0:846ee26b6faa 64 int error = 0;
jburhenn 0:846ee26b6faa 65 // Add code to process the message. Here we just ouput the message data.
jburhenn 0:846ee26b6faa 66 outputMessage(message);
jburhenn 0:846ee26b6faa 67
jburhenn 2:09f0c27ef315 68 if (message.topic == COMMAND_TOPIC) {
jburhenn 2:09f0c27ef315 69 // If this is a command message we publish a response to show we recieved it. Here we are just sending a default 'OK' response.
jburhenn 2:09f0c27ef315 70 // An error response should be sent if there are issues processing the message.
jburhenn 4:bf86ca1400b7 71 if ((error = mqttClient.publishResponse(message.id, NULL, message.clientID)) != CAYENNE_SUCCESS) {
jburhenn 2:09f0c27ef315 72 printf("Response failure, error: %d\n", error);
jburhenn 2:09f0c27ef315 73 }
jburhenn 2:09f0c27ef315 74
jburhenn 2:09f0c27ef315 75 // Send the updated state for the channel so it is reflected in the Cayenne dashboard. If a command is successfully processed
jburhenn 2:09f0c27ef315 76 // the updated state will usually just be the value received in the command message.
jburhenn 2:09f0c27ef315 77 if ((error = mqttClient.publishData(DATA_TOPIC, message.channel, NULL, NULL, message.getValue())) != CAYENNE_SUCCESS) {
jburhenn 2:09f0c27ef315 78 printf("Publish state failure, error: %d\n", error);
jburhenn 2:09f0c27ef315 79 }
jburhenn 2:09f0c27ef315 80 }
jburhenn 0:846ee26b6faa 81 }
jburhenn 0:846ee26b6faa 82
jburhenn 0:846ee26b6faa 83 /**
jburhenn 0:846ee26b6faa 84 * Connect to the Cayenne server.
jburhenn 0:846ee26b6faa 85 * @return Returns CAYENNE_SUCCESS if the connection succeeds, or an error code otherwise.
jburhenn 0:846ee26b6faa 86 */
jburhenn 0:846ee26b6faa 87 int connectClient(void)
jburhenn 0:846ee26b6faa 88 {
jburhenn 0:846ee26b6faa 89 int error = 0;
jburhenn 0:846ee26b6faa 90 // Connect to the server.
jburhenn 0:846ee26b6faa 91 printf("Connecting to %s:%d\n", CAYENNE_DOMAIN, CAYENNE_PORT);
jburhenn 0:846ee26b6faa 92 while ((error = network.connect(CAYENNE_DOMAIN, CAYENNE_PORT)) != 0) {
jburhenn 0:846ee26b6faa 93 printf("TCP connect failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 94 wait(2);
jburhenn 0:846ee26b6faa 95 }
jburhenn 0:846ee26b6faa 96
jburhenn 2:09f0c27ef315 97 if ((error = mqttClient.connect()) != MQTT::SUCCESS) {
jburhenn 0:846ee26b6faa 98 printf("MQTT connect failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 99 return error;
jburhenn 0:846ee26b6faa 100 }
jburhenn 0:846ee26b6faa 101 printf("Connected\n");
jburhenn 0:846ee26b6faa 102
jburhenn 0:846ee26b6faa 103 // Subscribe to required topics.
jburhenn 0:846ee26b6faa 104 if ((error = mqttClient.subscribe(COMMAND_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 105 printf("Subscription to Command topic failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 106 }
jburhenn 0:846ee26b6faa 107 if ((error = mqttClient.subscribe(CONFIG_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 108 printf("Subscription to Config topic failed, error:%d\n", error);
jburhenn 0:846ee26b6faa 109 }
jburhenn 0:846ee26b6faa 110
jburhenn 0:846ee26b6faa 111 // Send device info. Here we just send some example values for the system info. These should be changed to use actual system data, or removed if not needed.
jburhenn 0:846ee26b6faa 112 mqttClient.publishData(SYS_VERSION_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, CAYENNE_VERSION);
jburhenn 0:846ee26b6faa 113 mqttClient.publishData(SYS_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "mbedDevice");
jburhenn 2:09f0c27ef315 114 //mqttClient.publishData(SYS_CPU_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "CPU Model");
jburhenn 2:09f0c27ef315 115 //mqttClient.publishData(SYS_CPU_SPEED_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "1000000000");
jburhenn 0:846ee26b6faa 116
jburhenn 0:846ee26b6faa 117 return CAYENNE_SUCCESS;
jburhenn 0:846ee26b6faa 118 }
jburhenn 0:846ee26b6faa 119
jburhenn 0:846ee26b6faa 120 /**
jburhenn 0:846ee26b6faa 121 * Main loop where MQTT code is run.
jburhenn 0:846ee26b6faa 122 */
jburhenn 0:846ee26b6faa 123 void loop(void)
jburhenn 0:846ee26b6faa 124 {
jburhenn 7:a96efcf59599 125 // Start the countdown timer for publishing data every 5 seconds. Change the timeout parameter to publish at a different interval.
jburhenn 0:846ee26b6faa 126 MQTTTimer timer(5000);
jburhenn 0:846ee26b6faa 127
jburhenn 0:846ee26b6faa 128 while (true) {
jburhenn 0:846ee26b6faa 129 // Yield to allow MQTT message processing.
jburhenn 0:846ee26b6faa 130 mqttClient.yield(1000);
jburhenn 0:846ee26b6faa 131
jburhenn 0:846ee26b6faa 132 // Check that we are still connected, if not, reconnect.
jburhenn 0:846ee26b6faa 133 if (!network.connected() || !mqttClient.connected()) {
jburhenn 0:846ee26b6faa 134 network.disconnect();
jburhenn 0:846ee26b6faa 135 mqttClient.disconnect();
jburhenn 0:846ee26b6faa 136 printf("Reconnecting\n");
jburhenn 0:846ee26b6faa 137 while (connectClient() != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 138 wait(2);
jburhenn 0:846ee26b6faa 139 printf("Reconnect failed, retrying\n");
jburhenn 0:846ee26b6faa 140 }
jburhenn 0:846ee26b6faa 141 }
jburhenn 0:846ee26b6faa 142
jburhenn 0:846ee26b6faa 143 // Publish some example data every few seconds. This should be changed to send your actual data to Cayenne.
jburhenn 0:846ee26b6faa 144 if (timer.expired()) {
jburhenn 0:846ee26b6faa 145 int error = 0;
jburhenn 3:6197c64f2059 146 if ((error = mqttClient.publishData(DATA_TOPIC, 0, TYPE_TEMPERATURE, UNIT_CELSIUS, 30.5)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 147 printf("Publish temperature failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 148 }
jburhenn 3:6197c64f2059 149 if ((error = mqttClient.publishData(DATA_TOPIC, 1, TYPE_LUMINOSITY, UNIT_LUX, 1000)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 150 printf("Publish luminosity failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 151 }
jburhenn 3:6197c64f2059 152 if ((error = mqttClient.publishData(DATA_TOPIC, 2, TYPE_BAROMETRIC_PRESSURE, UNIT_HECTOPASCAL, 800)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 153 printf("Publish barometric pressure failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 154 }
jburhenn 7:a96efcf59599 155 // Restart the countdown timer for publishing data every 5 seconds. Change the timeout parameter to publish at a different interval.
jburhenn 0:846ee26b6faa 156 timer.countdown_ms(5000);
jburhenn 0:846ee26b6faa 157 }
jburhenn 0:846ee26b6faa 158 }
jburhenn 0:846ee26b6faa 159 }
jburhenn 0:846ee26b6faa 160
jburhenn 0:846ee26b6faa 161 /**
jburhenn 0:846ee26b6faa 162 * Main function.
jburhenn 0:846ee26b6faa 163 */
jburhenn 0:846ee26b6faa 164 int main()
jburhenn 0:846ee26b6faa 165 {
jburhenn 0:846ee26b6faa 166 printf("Initializing interface\n");
jburhenn 0:846ee26b6faa 167 interface.init();
jburhenn 0:846ee26b6faa 168
jburhenn 0:846ee26b6faa 169 // Set the default function that receives Cayenne messages.
jburhenn 0:846ee26b6faa 170 mqttClient.setDefaultMessageHandler(messageArrived);
jburhenn 0:846ee26b6faa 171
jburhenn 0:846ee26b6faa 172 // Connect to Cayenne.
jburhenn 0:846ee26b6faa 173 if (connectClient() == CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 174 // Run main loop.
jburhenn 0:846ee26b6faa 175 loop();
jburhenn 0:846ee26b6faa 176 }
jburhenn 0:846ee26b6faa 177 else {
jburhenn 0:846ee26b6faa 178 printf("Connection failed, exiting\n");
jburhenn 0:846ee26b6faa 179 }
jburhenn 0:846ee26b6faa 180
jburhenn 0:846ee26b6faa 181 if (mqttClient.connected())
jburhenn 0:846ee26b6faa 182 mqttClient.disconnect();
jburhenn 0:846ee26b6faa 183 if (network.connected())
jburhenn 0:846ee26b6faa 184 network.disconnect();
jburhenn 0:846ee26b6faa 185
jburhenn 0:846ee26b6faa 186 return 0;
jburhenn 0:846ee26b6faa 187 }
jburhenn 0:846ee26b6faa 188