myDevicesIoT / Mbed 2 deprecated Cayenne-WIZnetInterface

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Dependencies:   Cayenne-MQTT-mbed WIZnetInterface mbed

main.cpp@0:1474d4e95b55, 2016-10-12 (annotated)

Committer:
jburhenn
Date:
Wed Oct 12 18:56:25 2016 +0000
Revision:
0:1474d4e95b55
Child:
1:f9c3eebc57ef
Example for connecting to Cayenne using the WIZnetInterface library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jburhenn 0:1474d4e95b55 1 /**
jburhenn 0:1474d4e95b55 2 * Example app for using the Cayenne MQTT C++ library to send and receive example data. This example uses
jburhenn 0:1474d4e95b55 3 * the WIZnetInterface library to connect via Ethernet.
jburhenn 0:1474d4e95b55 4 */
jburhenn 0:1474d4e95b55 5
jburhenn 0:1474d4e95b55 6 #include "MQTTTimer.h"
jburhenn 0:1474d4e95b55 7 #include "CayenneMQTTClient.h"
jburhenn 0:1474d4e95b55 8 #include "MQTTNetwork.h"
jburhenn 0:1474d4e95b55 9 #include "EthernetInterface.h"
jburhenn 0:1474d4e95b55 10
jburhenn 0:1474d4e95b55 11 // Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
jburhenn 0:1474d4e95b55 12 char* username = "MQTT_USERNAME";
jburhenn 0:1474d4e95b55 13 char* clientID = "CLIENT_ID";
jburhenn 0:1474d4e95b55 14 char* password = "MQTT_PASSWORD";
jburhenn 0:1474d4e95b55 15
jburhenn 0:1474d4e95b55 16 SPI spi(D11, D12, D13);
jburhenn 0:1474d4e95b55 17 EthernetInterface interface(&spi, D10, D5); // MOSI, MISO, SCK, SEL, Reset
jburhenn 0:1474d4e95b55 18 MQTTNetwork<EthernetInterface> network(interface);
jburhenn 0:1474d4e95b55 19 Cayenne::MQTTClient<MQTTNetwork<EthernetInterface>, MQTTTimer> mqttClient(network);
jburhenn 0:1474d4e95b55 20
jburhenn 0:1474d4e95b55 21 /**
jburhenn 0:1474d4e95b55 22 * Print the message info.
jburhenn 0:1474d4e95b55 23 * @param[in] message The message received from the Cayenne server.
jburhenn 0:1474d4e95b55 24 */
jburhenn 0:1474d4e95b55 25 void outputMessage(Cayenne::MessageData& message)
jburhenn 0:1474d4e95b55 26 {
jburhenn 0:1474d4e95b55 27 switch (message.topic) {
jburhenn 0:1474d4e95b55 28 case COMMAND_TOPIC:
jburhenn 0:1474d4e95b55 29 printf("topic=Command");
jburhenn 0:1474d4e95b55 30 break;
jburhenn 0:1474d4e95b55 31 case CONFIG_TOPIC:
jburhenn 0:1474d4e95b55 32 printf("topic=Config");
jburhenn 0:1474d4e95b55 33 break;
jburhenn 0:1474d4e95b55 34 default:
jburhenn 0:1474d4e95b55 35 printf("topic=%d", message.topic);
jburhenn 0:1474d4e95b55 36 break;
jburhenn 0:1474d4e95b55 37 }
jburhenn 0:1474d4e95b55 38 printf(" channel=%d", message.channel);
jburhenn 0:1474d4e95b55 39 if (message.clientID) {
jburhenn 0:1474d4e95b55 40 printf(" clientID=%s", message.clientID);
jburhenn 0:1474d4e95b55 41 }
jburhenn 0:1474d4e95b55 42 if (message.type) {
jburhenn 0:1474d4e95b55 43 printf(" type=%s", message.type);
jburhenn 0:1474d4e95b55 44 }
jburhenn 0:1474d4e95b55 45 for (size_t i = 0; i < message.valueCount; ++i) {
jburhenn 0:1474d4e95b55 46 if (message.values[i].value) {
jburhenn 0:1474d4e95b55 47 printf(" value=%s", message.values[i].value);
jburhenn 0:1474d4e95b55 48 }
jburhenn 0:1474d4e95b55 49 if (message.values[i].unit) {
jburhenn 0:1474d4e95b55 50 printf(" unit=%s", message.values[i].unit);
jburhenn 0:1474d4e95b55 51 }
jburhenn 0:1474d4e95b55 52 }
jburhenn 0:1474d4e95b55 53 if (message.id) {
jburhenn 0:1474d4e95b55 54 printf(" id=%s", message.id);
jburhenn 0:1474d4e95b55 55 }
jburhenn 0:1474d4e95b55 56 printf("\n");
jburhenn 0:1474d4e95b55 57 }
jburhenn 0:1474d4e95b55 58
jburhenn 0:1474d4e95b55 59 /**
jburhenn 0:1474d4e95b55 60 * Handle messages received from the Cayenne server.
jburhenn 0:1474d4e95b55 61 * @param[in] message The message received from the Cayenne server.
jburhenn 0:1474d4e95b55 62 */
jburhenn 0:1474d4e95b55 63 void messageArrived(Cayenne::MessageData& message)
jburhenn 0:1474d4e95b55 64 {
jburhenn 0:1474d4e95b55 65 int error = 0;
jburhenn 0:1474d4e95b55 66 // Add code to process the message. Here we just ouput the message data.
jburhenn 0:1474d4e95b55 67 outputMessage(message);
jburhenn 0:1474d4e95b55 68
jburhenn 0:1474d4e95b55 69 // If this is a command message we publish a response. Here we are just sending a default 'OK' response.
jburhenn 0:1474d4e95b55 70 // An error response should be sent if there are issues processing the message.
jburhenn 0:1474d4e95b55 71 if (message.topic == COMMAND_TOPIC && (error = mqttClient.publishResponse(message.channel, message.id, NULL, message.clientID)) != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 72 printf("Response failure, error: %d\n", error);
jburhenn 0:1474d4e95b55 73 }
jburhenn 0:1474d4e95b55 74 }
jburhenn 0:1474d4e95b55 75
jburhenn 0:1474d4e95b55 76 /**
jburhenn 0:1474d4e95b55 77 * Connect to the Cayenne server.
jburhenn 0:1474d4e95b55 78 * @return Returns CAYENNE_SUCCESS if the connection succeeds, or an error code otherwise.
jburhenn 0:1474d4e95b55 79 */
jburhenn 0:1474d4e95b55 80 int connectClient(void)
jburhenn 0:1474d4e95b55 81 {
jburhenn 0:1474d4e95b55 82 int error = 0;
jburhenn 0:1474d4e95b55 83 // Connect to the server.
jburhenn 0:1474d4e95b55 84 printf("Connecting to %s:%d\n", CAYENNE_DOMAIN, CAYENNE_PORT);
jburhenn 0:1474d4e95b55 85 while ((error = network.connect(CAYENNE_DOMAIN, CAYENNE_PORT)) != 0) {
jburhenn 0:1474d4e95b55 86 printf("TCP connect failed, error: %d\n", error);
jburhenn 0:1474d4e95b55 87 wait(2);
jburhenn 0:1474d4e95b55 88 }
jburhenn 0:1474d4e95b55 89
jburhenn 0:1474d4e95b55 90 if ((error = mqttClient.connect(username, clientID, password)) != MQTT::SUCCESS) {
jburhenn 0:1474d4e95b55 91 printf("MQTT connect failed, error: %d\n", error);
jburhenn 0:1474d4e95b55 92 return error;
jburhenn 0:1474d4e95b55 93 }
jburhenn 0:1474d4e95b55 94 printf("Connected\n");
jburhenn 0:1474d4e95b55 95
jburhenn 0:1474d4e95b55 96 // Subscribe to required topics.
jburhenn 0:1474d4e95b55 97 if ((error = mqttClient.subscribe(COMMAND_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 98 printf("Subscription to Command topic failed, error: %d\n", error);
jburhenn 0:1474d4e95b55 99 }
jburhenn 0:1474d4e95b55 100 if ((error = mqttClient.subscribe(CONFIG_TOPIC, CAYENNE_ALL_CHANNELS)) != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 101 printf("Subscription to Config topic failed, error:%d\n", error);
jburhenn 0:1474d4e95b55 102 }
jburhenn 0:1474d4e95b55 103
jburhenn 0:1474d4e95b55 104 // 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 0:1474d4e95b55 105 mqttClient.publishData(SYS_VERSION_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, CAYENNE_VERSION);
jburhenn 0:1474d4e95b55 106 mqttClient.publishData(SYS_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "mbedDevice");
jburhenn 0:1474d4e95b55 107 mqttClient.publishData(SYS_CPU_MODEL_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "CPU Model");
jburhenn 0:1474d4e95b55 108 mqttClient.publishData(SYS_CPU_SPEED_TOPIC, CAYENNE_NO_CHANNEL, NULL, NULL, "1000000000");
jburhenn 0:1474d4e95b55 109
jburhenn 0:1474d4e95b55 110 return CAYENNE_SUCCESS;
jburhenn 0:1474d4e95b55 111 }
jburhenn 0:1474d4e95b55 112
jburhenn 0:1474d4e95b55 113 /**
jburhenn 0:1474d4e95b55 114 * Main loop where MQTT code is run.
jburhenn 0:1474d4e95b55 115 */
jburhenn 0:1474d4e95b55 116 void loop(void)
jburhenn 0:1474d4e95b55 117 {
jburhenn 0:1474d4e95b55 118 MQTTTimer timer(5000);
jburhenn 0:1474d4e95b55 119
jburhenn 0:1474d4e95b55 120 while (true) {
jburhenn 0:1474d4e95b55 121 // Yield to allow MQTT message processing.
jburhenn 0:1474d4e95b55 122 mqttClient.yield(1000);
jburhenn 0:1474d4e95b55 123
jburhenn 0:1474d4e95b55 124 // Check that we are still connected, if not, reconnect.
jburhenn 0:1474d4e95b55 125 if (!network.connected() || !mqttClient.connected()) {
jburhenn 0:1474d4e95b55 126 network.disconnect();
jburhenn 0:1474d4e95b55 127 mqttClient.disconnect();
jburhenn 0:1474d4e95b55 128 printf("Reconnecting\n");
jburhenn 0:1474d4e95b55 129 while (connectClient() != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 130 wait(2);
jburhenn 0:1474d4e95b55 131 printf("Reconnect failed, retrying\n");
jburhenn 0:1474d4e95b55 132 }
jburhenn 0:1474d4e95b55 133 }
jburhenn 0:1474d4e95b55 134
jburhenn 0:1474d4e95b55 135 // Publish some example data every few seconds. This should be changed to send your actual data to Cayenne.
jburhenn 0:1474d4e95b55 136 if (timer.expired()) {
jburhenn 0:1474d4e95b55 137 int error = 0;
jburhenn 0:1474d4e95b55 138 if ((error = mqttClient.publishData(DATA_TOPIC, 0, TEMPERATURE, CELSIUS, 30.5)) != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 139 printf("Publish temperature failed, error: %d\n", error);
jburhenn 0:1474d4e95b55 140 }
jburhenn 0:1474d4e95b55 141 if ((error = mqttClient.publishData(DATA_TOPIC, 1, LUMINOSITY, LUX, 1000)) != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 142 printf("Publish luminosity failed, error: %d\n", error);
jburhenn 0:1474d4e95b55 143 }
jburhenn 0:1474d4e95b55 144 if ((error = mqttClient.publishData(DATA_TOPIC, 2, BAROMETRIC_PRESSURE, HECTOPASCAL, 800)) != CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 145 printf("Publish barometric pressure failed, error: %d\n", error);
jburhenn 0:1474d4e95b55 146 }
jburhenn 0:1474d4e95b55 147 timer.countdown_ms(5000);
jburhenn 0:1474d4e95b55 148 }
jburhenn 0:1474d4e95b55 149 }
jburhenn 0:1474d4e95b55 150 }
jburhenn 0:1474d4e95b55 151
jburhenn 0:1474d4e95b55 152 /**
jburhenn 0:1474d4e95b55 153 * Main function.
jburhenn 0:1474d4e95b55 154 */
jburhenn 0:1474d4e95b55 155 int main()
jburhenn 0:1474d4e95b55 156 {
jburhenn 0:1474d4e95b55 157 printf("Initializing interface\n");
jburhenn 0:1474d4e95b55 158 // Set the correct SPI frequency for your shield, if necessary. For example, 42000000 for Arduino Ethernet Shield W5500 or 20000000 for Arduino Ethernet Shield W5100.
jburhenn 0:1474d4e95b55 159 spi.frequency(42000000);
jburhenn 0:1474d4e95b55 160 unsigned char MAC_Addr[6] = {0xFE,0x08,0xDC,0x12,0x34,0x56};
jburhenn 0:1474d4e95b55 161 mbed_mac_address((char *)MAC_Addr); // Use mbed mac address
jburhenn 0:1474d4e95b55 162 interface.init(MAC_Addr);
jburhenn 0:1474d4e95b55 163
jburhenn 0:1474d4e95b55 164 // Set the default function that receives Cayenne messages.
jburhenn 0:1474d4e95b55 165 mqttClient.setDefaultMessageHandler(messageArrived);
jburhenn 0:1474d4e95b55 166
jburhenn 0:1474d4e95b55 167 // Connect to Cayenne.
jburhenn 0:1474d4e95b55 168 if (connectClient() == CAYENNE_SUCCESS) {
jburhenn 0:1474d4e95b55 169 // Run main loop.
jburhenn 0:1474d4e95b55 170 loop();
jburhenn 0:1474d4e95b55 171 }
jburhenn 0:1474d4e95b55 172 else {
jburhenn 0:1474d4e95b55 173 printf("Connection failed, exiting\n");
jburhenn 0:1474d4e95b55 174 }
jburhenn 0:1474d4e95b55 175
jburhenn 0:1474d4e95b55 176 if (mqttClient.connected())
jburhenn 0:1474d4e95b55 177 mqttClient.disconnect();
jburhenn 0:1474d4e95b55 178 if (network.connected())
jburhenn 0:1474d4e95b55 179 network.disconnect();
jburhenn 0:1474d4e95b55 180
jburhenn 0:1474d4e95b55 181 return 0;
jburhenn 0:1474d4e95b55 182 }
jburhenn 0:1474d4e95b55 183