BUTTON LED COMBO - ST IOT CHALLENGE 2020
Dependencies: Cayenne-MQTT-mbed mbed X_NUCLEO_IDW01M1v2 NetworkSocketAPI
main.cpp
- Committer:
- jburhenn
- Date:
- 2016-11-04
- Revision:
- 3:4056f1cd4c47
- Parent:
- 2:445f09de09bd
- Child:
- 4:939f308d004a
File content as of revision 3:4056f1cd4c47:
/** * Example app for using the Cayenne MQTT C++ library to send and receive example data. This example uses * the X-NUCLEO-IDW01M1 WiFi expansion board via the X_NUCLEO_IDW01M1v2 library. */ #include "MQTTTimer.h" #include "CayenneMQTTClient.h" #include "MQTTNetworkIDW01M1.h" #include "SpwfInterface.h" // WiFi network info. char* ssid = "ssid"; char* wifiPassword = "wifiPassword"; // Cayenne authentication info. This should be obtained from the Cayenne Dashboard. char* username = "MQTT_USERNAME"; char* password = "MQTT_PASSWORD"; char* clientID = "CLIENT_ID"; SpwfSAInterface interface(D8, D2); // TX, RX MQTTNetwork<SpwfSAInterface> network(interface); CayenneMQTT::MQTTClient<MQTTNetwork<SpwfSAInterface>, MQTTTimer> mqttClient(network, username, password, clientID); DigitalOut led1(LED1); /** * Print the message info. * @param[in] message The message received from the Cayenne server. */ void outputMessage(CayenneMQTT::MessageData& message) { switch (message.topic) { case COMMAND_TOPIC: printf("topic=Command"); break; case CONFIG_TOPIC: printf("topic=Config"); break; default: printf("topic=%d", message.topic); break; } printf(" channel=%d", message.channel); if (message.clientID) { printf(" clientID=%s", message.clientID); } if (message.type) { printf(" type=%s", message.type); } for (size_t i = 0; i < message.valueCount; ++i) { if (message.getValue(i)) { printf(" value=%s", message.getValue(i)); } if (message.getUnit(i)) { printf(" unit=%s", message.getUnit(i)); } } if (message.id) { printf(" id=%s", message.id); } printf("\n"); } /** * Handle messages received from the Cayenne server. * @param[in] message The message received from the Cayenne server. */ void messageArrived(CayenneMQTT::MessageData& message) { int error = 0; // Add code to process the message. Here we just ouput the message data. outputMessage(message); if (message.topic == COMMAND_TOPIC) { switch(message.channel) { case 0: // Set the onboard LED state led1 = atoi(message.getValue()); // Publish the updated LED state if ((error = mqttClient.publishData(DATA_TOPIC, message.channel, NULL, NULL, message.getValue())) != CAYENNE_SUCCESS) { printf("Publish LED state failure, error: %d\n", error); } break; } // If this is a command message we publish a response. Here we are just sending a default 'OK' response. // An error response should be sent if there are issues processing the message. if ((error = mqttClient.publishResponse(message.channel, message.id, NULL, message.clientID)) != CAYENNE_SUCCESS) { printf("Response failure, error: %d\n", error); } } } /** * Connect to the Cayenne server. * @return Returns CAYENNE_SUCCESS if the connection succeeds, or an error code otherwise. */ int connectClient(void) { int error = 0; // Connect to the server. printf("Connecting to %s:%d\n", CAYENNE_DOMAIN, CAYENNE_PORT); while ((error = network.connect(CAYENNE_DOMAIN, CAYENNE_PORT)) != 0) { printf("TCP connect failed, error: %d\n", error); wait(2); } if ((error = mqttClient.connect()) != MQTT::SUCCESS) { printf("MQTT connect failed, error: %d\n", error); return error; } printf("Connected\n"); // Subscribe to required topics. if ((error = mqttClient.subscribe(COMMAND_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) { printf("Subscription to Command topic failed, error: %d\n", error); } if ((error = mqttClient.subscribe(CONFIG_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) { printf("Subscription to Config topic failed, error:%d\n", error); } // 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. mqttClient.publishData(SYS_VERSION_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, CAYENNE_VERSION); mqttClient.publishData(SYS_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "mbedDevice"); //mqttClient.publishData(SYS_CPU_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "CPU Model"); //mqttClient.publishData(SYS_CPU_SPEED_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "1000000000"); return CAYENNE_SUCCESS; } /** * Main loop where MQTT code is run. */ void loop(void) { MQTTTimer timer(5000); while (true) { // Yield to allow MQTT message processing. mqttClient.yield(1000); // Check that we are still connected, if not, reconnect. if (!network.connected() || !mqttClient.connected()) { network.disconnect(); mqttClient.disconnect(); printf("Reconnecting\n"); while (connectClient() != CAYENNE_SUCCESS) { wait(2); printf("Reconnect failed, retrying\n"); } } // Publish some example data every few seconds. This should be changed to send your actual data to Cayenne. if (timer.expired()) { int error = 0; if ((error = mqttClient.publishData(DATA_TOPIC, 1, TYPE_TEMPERATURE, UNIT_CELSIUS, 30.5)) != CAYENNE_SUCCESS) { printf("Publish temperature failed, error: %d\n", error); } if ((error = mqttClient.publishData(DATA_TOPIC, 2, TYPE_LUMINOSITY, UNIT_LUX, 1000)) != CAYENNE_SUCCESS) { printf("Publish luminosity failed, error: %d\n", error); } if ((error = mqttClient.publishData(DATA_TOPIC, 3, TYPE_BAROMETRIC_PRESSURE, UNIT_HECTOPASCAL, 800)) != CAYENNE_SUCCESS) { printf("Publish barometric pressure failed, error: %d\n", error); } timer.countdown_ms(5000); } } } /** * Main function. */ int main() { // Initialize the network interface. printf("Initializing interface\n"); interface.connect(ssid, wifiPassword, NSAPI_SECURITY_WPA2); // Set the default function that receives Cayenne messages. mqttClient.setDefaultMessageHandler(messageArrived); // Connect to Cayenne. if (connectClient() == CAYENNE_SUCCESS) { // Run main loop. loop(); } else { printf("Connection failed, exiting\n"); } if (mqttClient.connected()) mqttClient.disconnect(); if (network.connected()) network.disconnect(); return 0; }