129 lines
4.1 KiB
C++
129 lines
4.1 KiB
C++
// Adafruit IO MQTT Example for ESP8266.
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// Must be using ESP8266 Arduino from:
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// https://github.com/esp8266/Arduino
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#include <ESP8266WiFi.h>
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#include "Adafruit_MQTT.h"
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#include "Adafruit_MQTT_Client.h"
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/************************* WiFi Access Point *********************************/
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#define WLAN_SSID "...your SSID..."
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#define WLAN_PASS "...your password..."
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/************************* Adafruit.io Setup *********************************/
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#define AIO_SERVER "io.adafruit.com"
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#define AIO_SERVERPORT 1883
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#define AIO_USERNAME "...your AIO username (see https://accounts.adafruit.com)..."
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#define AIO_KEY "...your AIO key...";
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/* Debug server configuration (not normally used):
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#define AIO_SERVER "apt.adafruit.com"
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#define AIO_SERVERPORT 1883
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*/
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/************ Global State (you don't need to change this!) ******************/
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// Create an ESP8266 WiFiClient class to connect to the MQTT server.
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WiFiClient client;
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// Store the MQTT server, client ID, username, and password in flash memory.
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// This is required for using the Adafruit MQTT library.
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const char MQTT_SERVER[] PROGMEM = AIO_SERVER;
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const char MQTT_CLIENTID[] PROGMEM = AIO_KEY;
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const char MQTT_USERNAME[] PROGMEM = AIO_USERNAME;
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const char MQTT_PASSWORD[] PROGMEM = AIO_KEY;
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// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
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Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, AIO_SERVERPORT, MQTT_CLIENTID, MQTT_USERNAME, MQTT_PASSWORD);
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/****************************** Feeds ***************************************/
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// Setup a feed called 'photocell' for publishing.
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// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
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const char PHOTOCELL_FEED[] PROGMEM = AIO_USERNAME "/feeds/photocell";
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Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, PHOTOCELL_FEED);
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// Setup a feed called 'onoff' for subscribing to changes.
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const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/onoff";
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Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, ONOFF_FEED);
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/*************************** Sketch Code ************************************/
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void setup() {
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Serial.begin(115200);
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delay(10);
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Serial.println(F("Adafruit MQTT demo"));
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// Connect to WiFi access point.
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Serial.println(); Serial.println();
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Serial.print("Connecting to ");
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Serial.println(WLAN_SSID);
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WiFi.begin(WLAN_SSID, WLAN_PASS);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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Serial.println("WiFi connected");
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Serial.println("IP address: "); Serial.println(WiFi.localIP());
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// Setup MQTT subscription for onoff feed.
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mqtt.subscribe(&onoffbutton);
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// Connect to MQTT server.
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Serial.println(F("Connecting to MQTT..."));
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int8_t ret;
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while ((ret = mqtt.connect()) != 0) {
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switch (ret) {
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case 1: Serial.println(F("Wrong protocol")); break;
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case 2: Serial.println(F("ID rejected")); break;
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case 3: Serial.println(F("Server unavail")); break;
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case 4: Serial.println(F("Bad user/pass")); break;
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case 5: Serial.println(F("Not authed")); break;
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case 6: Serial.println(F("Failed to subscribe")); break;
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default: Serial.println(F("Couldn't connect to MQTT server")); break;
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}
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Serial.println(F("Retrying MQTT connection"));
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mqtt.disconnect();
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delay(5000);
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}
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Serial.println(F("MQTT Connected!"));
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}
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uint32_t x=0;
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void loop() {
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// Try to ping the MQTT server
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/*
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if (! mqtt.ping(3) ) {
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// MQTT pings failed, lets reconnect
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Serial.println("Ping fail!");
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}
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*/
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// this is our 'wait for incoming subscription packets' busy subloop
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Adafruit_MQTT_Subscribe *subscription;
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while (subscription = mqtt.readSubscription(1000)) {
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if (subscription == &onoffbutton) {
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Serial.print(F("Got: "));
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Serial.println((char *)onoffbutton.lastread);
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}
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}
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// Now we can publish stuff!
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Serial.print(F("\nSending photocell val "));
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Serial.print(x);
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Serial.print("...");
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if (! photocell.publish(x++)) {
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Serial.println(F("Failed"));
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} else {
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Serial.println(F("OK!"));
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}
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delay(1000);
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}
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