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Dependencies:   Cayenne-MQTT-mbed mbed Servo X_NUCLEO_IDW01M1v2 NetworkSocketAPI HCSR04

main.cpp@0:d20655cd1f3c, 2016-10-07 (annotated)

Committer:
jburhenn
Date:
Fri Oct 07 18:30:51 2016 +0000
Revision:
0:d20655cd1f3c
Child:
1:a2d8aec2bb92
Example for connecting to Cayenne using an X-NUCLEO-IDW01M1 WiFi expansion board.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jburhenn 0:d20655cd1f3c 1 /**
jburhenn 0:d20655cd1f3c 2 * Example app for using the Cayenne MQTT C++ library to send and receive example data. This example uses
jburhenn 0:d20655cd1f3c 3 * the X-NUCLEO-IDW01M1 WiFi expansion board via the X_NUCLEO_IDW01M1v2 library.
jburhenn 0:d20655cd1f3c 4 */
jburhenn 0:d20655cd1f3c 5
jburhenn 0:d20655cd1f3c 6 #include "MQTTTimer.h"
jburhenn 0:d20655cd1f3c 7 #include "CayenneMQTTClient.h"
jburhenn 0:d20655cd1f3c 8 #include "MQTTNetworkIDW01M1.h"
jburhenn 0:d20655cd1f3c 9 #include "SpwfInterface.h"
jburhenn 0:d20655cd1f3c 10
jburhenn 0:d20655cd1f3c 11 // WiFi network info.
jburhenn 0:d20655cd1f3c 12 char* ssid = "ssid";
jburhenn 0:d20655cd1f3c 13 char* wifiPassword = "wifiPassword";
jburhenn 0:d20655cd1f3c 14
jburhenn 0:d20655cd1f3c 15 // Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
jburhenn 0:d20655cd1f3c 16 char* username = "MQTT_USERNAME";
jburhenn 0:d20655cd1f3c 17 char* clientID = "CLIENT_ID";
jburhenn 0:d20655cd1f3c 18 char* password = "MQTT_PASSWORD";
jburhenn 0:d20655cd1f3c 19
jburhenn 0:d20655cd1f3c 20 SpwfSAInterface interface(D8, D2); // TX, RX
jburhenn 0:d20655cd1f3c 21 MQTTNetwork<SpwfSAInterface> network(interface);
jburhenn 0:d20655cd1f3c 22 Cayenne::MQTTClient<MQTTNetwork<SpwfSAInterface>, MQTTTimer> mqttClient(network);
jburhenn 0:d20655cd1f3c 23
jburhenn 0:d20655cd1f3c 24 /**
jburhenn 0:d20655cd1f3c 25 * Print the message info.
jburhenn 0:d20655cd1f3c 26 * @param[in] message The message received from the Cayenne server.
jburhenn 0:d20655cd1f3c 27 */
jburhenn 0:d20655cd1f3c 28 void outputMessage(Cayenne::MessageData& message)
jburhenn 0:d20655cd1f3c 29 {
jburhenn 0:d20655cd1f3c 30 switch (message.topic) {
jburhenn 0:d20655cd1f3c 31 case COMMAND_TOPIC:
jburhenn 0:d20655cd1f3c 32 printf("topic=Command");
jburhenn 0:d20655cd1f3c 33 break;
jburhenn 0:d20655cd1f3c 34 case CONFIG_TOPIC:
jburhenn 0:d20655cd1f3c 35 printf("topic=Config");
jburhenn 0:d20655cd1f3c 36 break;
jburhenn 0:d20655cd1f3c 37 default:
jburhenn 0:d20655cd1f3c 38 printf("topic=%d", message.topic);
jburhenn 0:d20655cd1f3c 39 break;
jburhenn 0:d20655cd1f3c 40 }
jburhenn 0:d20655cd1f3c 41 printf(" channel=%d", message.channel);
jburhenn 0:d20655cd1f3c 42 if (message.clientID) {
jburhenn 0:d20655cd1f3c 43 printf(" clientID=%s", message.clientID);
jburhenn 0:d20655cd1f3c 44 }
jburhenn 0:d20655cd1f3c 45 if (message.type) {
jburhenn 0:d20655cd1f3c 46 printf(" type=%s", message.type);
jburhenn 0:d20655cd1f3c 47 }
jburhenn 0:d20655cd1f3c 48 for (size_t i = 0; i < message.valueCount; ++i) {
jburhenn 0:d20655cd1f3c 49 if (message.values[i].value) {
jburhenn 0:d20655cd1f3c 50 printf(" value=%s", message.values[i].value);
jburhenn 0:d20655cd1f3c 51 }
jburhenn 0:d20655cd1f3c 52 if (message.values[i].unit) {
jburhenn 0:d20655cd1f3c 53 printf(" unit=%s", message.values[i].unit);
jburhenn 0:d20655cd1f3c 54 }
jburhenn 0:d20655cd1f3c 55 }
jburhenn 0:d20655cd1f3c 56 if (message.id) {
jburhenn 0:d20655cd1f3c 57 printf(" id=%s", message.id);
jburhenn 0:d20655cd1f3c 58 }
jburhenn 0:d20655cd1f3c 59 printf("\n");
jburhenn 0:d20655cd1f3c 60 }
jburhenn 0:d20655cd1f3c 61
jburhenn 0:d20655cd1f3c 62 /**
jburhenn 0:d20655cd1f3c 63 * Handle messages received from the Cayenne server.
jburhenn 0:d20655cd1f3c 64 * @param[in] message The message received from the Cayenne server.
jburhenn 0:d20655cd1f3c 65 */
jburhenn 0:d20655cd1f3c 66 void messageArrived(Cayenne::MessageData& message)
jburhenn 0:d20655cd1f3c 67 {
jburhenn 0:d20655cd1f3c 68 int error = 0;
jburhenn 0:d20655cd1f3c 69 // Add code to process the message. Here we just ouput the message data.
jburhenn 0:d20655cd1f3c 70 outputMessage(message);
jburhenn 0:d20655cd1f3c 71
jburhenn 0:d20655cd1f3c 72 // If this is a command message we publish a response. Here we are just sending a default 'OK' response.
jburhenn 0:d20655cd1f3c 73 // An error response should be sent if there are issues processing the message.
jburhenn 0:d20655cd1f3c 74 if (message.topic == COMMAND_TOPIC && (error = mqttClient.publishResponse(message.channel, message.id, NULL, message.clientID)) != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 75 printf("Response failure, error: %d\n", error);
jburhenn 0:d20655cd1f3c 76 }
jburhenn 0:d20655cd1f3c 77 }
jburhenn 0:d20655cd1f3c 78
jburhenn 0:d20655cd1f3c 79 /**
jburhenn 0:d20655cd1f3c 80 * Connect to the Cayenne server.
jburhenn 0:d20655cd1f3c 81 * @return Returns CAYENNE_SUCCESS if the connection succeeds, or an error code otherwise.
jburhenn 0:d20655cd1f3c 82 */
jburhenn 0:d20655cd1f3c 83 int connectClient(void)
jburhenn 0:d20655cd1f3c 84 {
jburhenn 0:d20655cd1f3c 85 int error = 0;
jburhenn 0:d20655cd1f3c 86 // Connect to the server.
jburhenn 0:d20655cd1f3c 87 printf("Connecting to %s:%d\n", CAYENNE_DOMAIN, CAYENNE_PORT);
jburhenn 0:d20655cd1f3c 88 while ((error = network.connect(CAYENNE_DOMAIN, CAYENNE_PORT)) != 0) {
jburhenn 0:d20655cd1f3c 89 printf("TCP connect failed, error: %d\n", error);
jburhenn 0:d20655cd1f3c 90 wait(2);
jburhenn 0:d20655cd1f3c 91 }
jburhenn 0:d20655cd1f3c 92
jburhenn 0:d20655cd1f3c 93 if ((error = mqttClient.connect(username, clientID, password)) != MQTT::SUCCESS) {
jburhenn 0:d20655cd1f3c 94 printf("MQTT connect failed, error: %d\n", error);
jburhenn 0:d20655cd1f3c 95 return error;
jburhenn 0:d20655cd1f3c 96 }
jburhenn 0:d20655cd1f3c 97 printf("Connected\n");
jburhenn 0:d20655cd1f3c 98
jburhenn 0:d20655cd1f3c 99 // Subscribe to required topics.
jburhenn 0:d20655cd1f3c 100 if ((error = mqttClient.subscribe(COMMAND_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 101 printf("Subscription to Command topic failed, error: %d\n", error);
jburhenn 0:d20655cd1f3c 102 }
jburhenn 0:d20655cd1f3c 103 if ((error = mqttClient.subscribe(CONFIG_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 104 printf("Subscription to Config topic failed, error:%d\n", error);
jburhenn 0:d20655cd1f3c 105 }
jburhenn 0:d20655cd1f3c 106
jburhenn 0:d20655cd1f3c 107 // 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:d20655cd1f3c 108 mqttClient.publishData(SYS_VERSION_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, CAYENNE_VERSION);
jburhenn 0:d20655cd1f3c 109 mqttClient.publishData(SYS_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "mbedDevice");
jburhenn 0:d20655cd1f3c 110 mqttClient.publishData(SYS_CPU_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "CPU Model");
jburhenn 0:d20655cd1f3c 111 mqttClient.publishData(SYS_CPU_SPEED_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "1000000000");
jburhenn 0:d20655cd1f3c 112
jburhenn 0:d20655cd1f3c 113 return CAYENNE_SUCCESS;
jburhenn 0:d20655cd1f3c 114 }
jburhenn 0:d20655cd1f3c 115
jburhenn 0:d20655cd1f3c 116 /**
jburhenn 0:d20655cd1f3c 117 * Main loop where MQTT code is run.
jburhenn 0:d20655cd1f3c 118 */
jburhenn 0:d20655cd1f3c 119 void loop(void)
jburhenn 0:d20655cd1f3c 120 {
jburhenn 0:d20655cd1f3c 121 MQTTTimer timer(5000);
jburhenn 0:d20655cd1f3c 122
jburhenn 0:d20655cd1f3c 123 while (true) {
jburhenn 0:d20655cd1f3c 124 // Yield to allow MQTT message processing.
jburhenn 0:d20655cd1f3c 125 mqttClient.yield(1000);
jburhenn 0:d20655cd1f3c 126
jburhenn 0:d20655cd1f3c 127 // Check that we are still connected, if not, reconnect.
jburhenn 0:d20655cd1f3c 128 if (!network.connected() || !mqttClient.connected()) {
jburhenn 0:d20655cd1f3c 129 network.disconnect();
jburhenn 0:d20655cd1f3c 130 mqttClient.disconnect();
jburhenn 0:d20655cd1f3c 131 printf("Reconnecting\n");
jburhenn 0:d20655cd1f3c 132 while (connectClient() != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 133 wait(2);
jburhenn 0:d20655cd1f3c 134 printf("Reconnect failed, retrying\n");
jburhenn 0:d20655cd1f3c 135 }
jburhenn 0:d20655cd1f3c 136 }
jburhenn 0:d20655cd1f3c 137
jburhenn 0:d20655cd1f3c 138 // Publish some example data every few seconds. This should be changed to send your actual data to Cayenne.
jburhenn 0:d20655cd1f3c 139 if (timer.expired()) {
jburhenn 0:d20655cd1f3c 140 int error = 0;
jburhenn 0:d20655cd1f3c 141 if ((error = mqttClient.publishData(DATA_TOPIC, 0, TEMPERATURE, CELSIUS, 30.5)) != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 142 printf("Publish temperature failed, error: %d\n", error);
jburhenn 0:d20655cd1f3c 143 }
jburhenn 0:d20655cd1f3c 144 if ((error = mqttClient.publishData(DATA_TOPIC, 1, LUMINOSITY, LUX, 1000)) != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 145 printf("Publish luminosity failed, error: %d\n", error);
jburhenn 0:d20655cd1f3c 146 }
jburhenn 0:d20655cd1f3c 147 if ((error = mqttClient.publishData(DATA_TOPIC, 2, BAROMETRIC_PRESSURE, HECTOPASCAL, 800)) != CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 148 printf("Publish barometric pressure failed, error: %d\n", error);
jburhenn 0:d20655cd1f3c 149 }
jburhenn 0:d20655cd1f3c 150 timer.countdown_ms(5000);
jburhenn 0:d20655cd1f3c 151 }
jburhenn 0:d20655cd1f3c 152 }
jburhenn 0:d20655cd1f3c 153 }
jburhenn 0:d20655cd1f3c 154
jburhenn 0:d20655cd1f3c 155 /**
jburhenn 0:d20655cd1f3c 156 * Main function.
jburhenn 0:d20655cd1f3c 157 */
jburhenn 0:d20655cd1f3c 158 int main()
jburhenn 0:d20655cd1f3c 159 {
jburhenn 0:d20655cd1f3c 160 // Initialize the network interface.
jburhenn 0:d20655cd1f3c 161 printf("Initializing interface\n");
jburhenn 0:d20655cd1f3c 162 interface.connect(ssid, wifiPassword, NSAPI_SECURITY_WPA2);
jburhenn 0:d20655cd1f3c 163
jburhenn 0:d20655cd1f3c 164 // Set the default function that receives Cayenne messages.
jburhenn 0:d20655cd1f3c 165 mqttClient.setDefaultMessageHandler(messageArrived);
jburhenn 0:d20655cd1f3c 166
jburhenn 0:d20655cd1f3c 167 // Connect to Cayenne.
jburhenn 0:d20655cd1f3c 168 if (connectClient() == CAYENNE_SUCCESS) {
jburhenn 0:d20655cd1f3c 169 // Run main loop.
jburhenn 0:d20655cd1f3c 170 loop();
jburhenn 0:d20655cd1f3c 171 }
jburhenn 0:d20655cd1f3c 172 else {
jburhenn 0:d20655cd1f3c 173 printf("Connection failed, exiting\n");
jburhenn 0:d20655cd1f3c 174 }
jburhenn 0:d20655cd1f3c 175
jburhenn 0:d20655cd1f3c 176 if (mqttClient.connected())
jburhenn 0:d20655cd1f3c 177 mqttClient.disconnect();
jburhenn 0:d20655cd1f3c 178 if (network.connected())
jburhenn 0:d20655cd1f3c 179 network.disconnect();
jburhenn 0:d20655cd1f3c 180
jburhenn 0:d20655cd1f3c 181 return 0;
jburhenn 0:d20655cd1f3c 182 }
jburhenn 0:d20655cd1f3c 183