myDevicesIoT / Mbed 2 deprecated Cayenne-WIZ820ioInterface

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

Dependencies:   Cayenne-MQTT-mbed WIZ820ioInterface mbed

main.cpp@0:846ee26b6faa, 2016-10-07 (annotated)

Committer:
jburhenn
Date:
Fri Oct 07 23:28:09 2016 +0000
Revision:
0:846ee26b6faa
Child:
2:09f0c27ef315
Connect to Cayenne using WIZ820ioInterface (W5200) library.

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 0:846ee26b6faa 11 WIZ820ioInterface interface(D11, D12, D13, D10, D5); // MOSI, MISO, SCK, SEL, Reset
jburhenn 0:846ee26b6faa 12 MQTTNetwork<WIZ820ioInterface> network(interface);
jburhenn 0:846ee26b6faa 13 Cayenne::MQTTClient<MQTTNetwork<WIZ820ioInterface>, MQTTTimer> mqttClient(network);
jburhenn 0:846ee26b6faa 14
jburhenn 0:846ee26b6faa 15 // Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
jburhenn 0:846ee26b6faa 16 char* username = "MQTT_USERNAME";
jburhenn 0:846ee26b6faa 17 char* clientID = "CLIENT_ID";
jburhenn 0:846ee26b6faa 18 char* password = "MQTT_PASSWORD";
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 0:846ee26b6faa 24 void outputMessage(Cayenne::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 0:846ee26b6faa 45 if (message.values[i].value) {
jburhenn 0:846ee26b6faa 46 printf(" value=%s", message.values[i].value);
jburhenn 0:846ee26b6faa 47 }
jburhenn 0:846ee26b6faa 48 if (message.values[i].unit) {
jburhenn 0:846ee26b6faa 49 printf(" unit=%s", message.values[i].unit);
jburhenn 0:846ee26b6faa 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 0:846ee26b6faa 62 void messageArrived(Cayenne::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 0:846ee26b6faa 68 // If this is a command message we publish a response. Here we are just sending a default 'OK' response.
jburhenn 0:846ee26b6faa 69 // An error response should be sent if there are issues processing the message.
jburhenn 0:846ee26b6faa 70 if (message.topic == COMMAND_TOPIC && (error = mqttClient.publishResponse(message.channel, message.id, NULL, message.clientID)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 71 printf("Response failure, error: %d\n", error);
jburhenn 0:846ee26b6faa 72 }
jburhenn 0:846ee26b6faa 73 }
jburhenn 0:846ee26b6faa 74
jburhenn 0:846ee26b6faa 75 /**
jburhenn 0:846ee26b6faa 76 * Connect to the Cayenne server.
jburhenn 0:846ee26b6faa 77 * @return Returns CAYENNE_SUCCESS if the connection succeeds, or an error code otherwise.
jburhenn 0:846ee26b6faa 78 */
jburhenn 0:846ee26b6faa 79 int connectClient(void)
jburhenn 0:846ee26b6faa 80 {
jburhenn 0:846ee26b6faa 81 int error = 0;
jburhenn 0:846ee26b6faa 82 // Connect to the server.
jburhenn 0:846ee26b6faa 83 printf("Connecting to %s:%d\n", CAYENNE_DOMAIN, CAYENNE_PORT);
jburhenn 0:846ee26b6faa 84 while ((error = network.connect(CAYENNE_DOMAIN, CAYENNE_PORT)) != 0) {
jburhenn 0:846ee26b6faa 85 printf("TCP connect failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 86 wait(2);
jburhenn 0:846ee26b6faa 87 }
jburhenn 0:846ee26b6faa 88
jburhenn 0:846ee26b6faa 89 if ((error = mqttClient.connect(username, clientID, password)) != MQTT::SUCCESS) {
jburhenn 0:846ee26b6faa 90 printf("MQTT connect failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 91 return error;
jburhenn 0:846ee26b6faa 92 }
jburhenn 0:846ee26b6faa 93 printf("Connected\n");
jburhenn 0:846ee26b6faa 94
jburhenn 0:846ee26b6faa 95 // Subscribe to required topics.
jburhenn 0:846ee26b6faa 96 if ((error = mqttClient.subscribe(COMMAND_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 97 printf("Subscription to Command topic failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 98 }
jburhenn 0:846ee26b6faa 99 if ((error = mqttClient.subscribe(CONFIG_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 100 printf("Subscription to Config topic failed, error:%d\n", error);
jburhenn 0:846ee26b6faa 101 }
jburhenn 0:846ee26b6faa 102
jburhenn 0:846ee26b6faa 103 // 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 104 mqttClient.publishData(SYS_VERSION_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, CAYENNE_VERSION);
jburhenn 0:846ee26b6faa 105 mqttClient.publishData(SYS_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "mbedDevice");
jburhenn 0:846ee26b6faa 106 mqttClient.publishData(SYS_CPU_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "CPU Model");
jburhenn 0:846ee26b6faa 107 mqttClient.publishData(SYS_CPU_SPEED_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "1000000000");
jburhenn 0:846ee26b6faa 108
jburhenn 0:846ee26b6faa 109 return CAYENNE_SUCCESS;
jburhenn 0:846ee26b6faa 110 }
jburhenn 0:846ee26b6faa 111
jburhenn 0:846ee26b6faa 112 /**
jburhenn 0:846ee26b6faa 113 * Main loop where MQTT code is run.
jburhenn 0:846ee26b6faa 114 */
jburhenn 0:846ee26b6faa 115 void loop(void)
jburhenn 0:846ee26b6faa 116 {
jburhenn 0:846ee26b6faa 117 MQTTTimer timer(5000);
jburhenn 0:846ee26b6faa 118
jburhenn 0:846ee26b6faa 119 while (true) {
jburhenn 0:846ee26b6faa 120 // Yield to allow MQTT message processing.
jburhenn 0:846ee26b6faa 121 mqttClient.yield(1000);
jburhenn 0:846ee26b6faa 122
jburhenn 0:846ee26b6faa 123 // Check that we are still connected, if not, reconnect.
jburhenn 0:846ee26b6faa 124 if (!network.connected() || !mqttClient.connected()) {
jburhenn 0:846ee26b6faa 125 network.disconnect();
jburhenn 0:846ee26b6faa 126 mqttClient.disconnect();
jburhenn 0:846ee26b6faa 127 printf("Reconnecting\n");
jburhenn 0:846ee26b6faa 128 while (connectClient() != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 129 wait(2);
jburhenn 0:846ee26b6faa 130 printf("Reconnect failed, retrying\n");
jburhenn 0:846ee26b6faa 131 }
jburhenn 0:846ee26b6faa 132 }
jburhenn 0:846ee26b6faa 133
jburhenn 0:846ee26b6faa 134 // Publish some example data every few seconds. This should be changed to send your actual data to Cayenne.
jburhenn 0:846ee26b6faa 135 if (timer.expired()) {
jburhenn 0:846ee26b6faa 136 int error = 0;
jburhenn 0:846ee26b6faa 137 if ((error = mqttClient.publishData(DATA_TOPIC, 0, TEMPERATURE, CELSIUS, 30.5)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 138 printf("Publish temperature failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 139 }
jburhenn 0:846ee26b6faa 140 if ((error = mqttClient.publishData(DATA_TOPIC, 1, LUMINOSITY, LUX, 1000)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 141 printf("Publish luminosity failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 142 }
jburhenn 0:846ee26b6faa 143 if ((error = mqttClient.publishData(DATA_TOPIC, 2, BAROMETRIC_PRESSURE, HECTOPASCAL, 800)) != CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 144 printf("Publish barometric pressure failed, error: %d\n", error);
jburhenn 0:846ee26b6faa 145 }
jburhenn 0:846ee26b6faa 146 timer.countdown_ms(5000);
jburhenn 0:846ee26b6faa 147 }
jburhenn 0:846ee26b6faa 148 }
jburhenn 0:846ee26b6faa 149 }
jburhenn 0:846ee26b6faa 150
jburhenn 0:846ee26b6faa 151 /**
jburhenn 0:846ee26b6faa 152 * Main function.
jburhenn 0:846ee26b6faa 153 */
jburhenn 0:846ee26b6faa 154 int main()
jburhenn 0:846ee26b6faa 155 {
jburhenn 0:846ee26b6faa 156 printf("Initializing interface\n");
jburhenn 0:846ee26b6faa 157 interface.init();
jburhenn 0:846ee26b6faa 158
jburhenn 0:846ee26b6faa 159 // Set the default function that receives Cayenne messages.
jburhenn 0:846ee26b6faa 160 mqttClient.setDefaultMessageHandler(messageArrived);
jburhenn 0:846ee26b6faa 161
jburhenn 0:846ee26b6faa 162 // Connect to Cayenne.
jburhenn 0:846ee26b6faa 163 if (connectClient() == CAYENNE_SUCCESS) {
jburhenn 0:846ee26b6faa 164 // Run main loop.
jburhenn 0:846ee26b6faa 165 loop();
jburhenn 0:846ee26b6faa 166 }
jburhenn 0:846ee26b6faa 167 else {
jburhenn 0:846ee26b6faa 168 printf("Connection failed, exiting\n");
jburhenn 0:846ee26b6faa 169 }
jburhenn 0:846ee26b6faa 170
jburhenn 0:846ee26b6faa 171 if (mqttClient.connected())
jburhenn 0:846ee26b6faa 172 mqttClient.disconnect();
jburhenn 0:846ee26b6faa 173 if (network.connected())
jburhenn 0:846ee26b6faa 174 network.disconnect();
jburhenn 0:846ee26b6faa 175
jburhenn 0:846ee26b6faa 176 return 0;
jburhenn 0:846ee26b6faa 177 }
jburhenn 0:846ee26b6faa 178