diff --git a/examples/mqtt_2subs_esp8266/mqtt_2subs_esp8266.ino b/examples/mqtt_2subs_esp8266/mqtt_2subs_esp8266.ino new file mode 100644 index 0000000..04ad3ad --- /dev/null +++ b/examples/mqtt_2subs_esp8266/mqtt_2subs_esp8266.ino @@ -0,0 +1,164 @@ +/*************************************************** + Adafruit MQTT Library ESP8266 Example + + Must use ESP8266 Arduino from: + https://github.com/esp8266/Arduino + + Works great with Adafruit's Huzzah ESP board & Feather + ----> https://www.adafruit.com/product/2471 + ----> https://www.adafruit.com/products/2821 + + Adafruit invests time and resources providing this open source code, + please support Adafruit and open-source hardware by purchasing + products from Adafruit! + + Written by Tony DiCola for Adafruit Industries. + MIT license, all text above must be included in any redistribution + ****************************************************/ +#include +#include "Adafruit_MQTT.h" +#include "Adafruit_MQTT_Client.h" + +// the on off button feed turns this LED on/off +#define LED 2 +// the slider feed sets the PWM output of this pin +#define PWMOUT 12 + +/************************* WiFi Access Point *********************************/ + +#define WLAN_SSID "...your SSID..." +#define WLAN_PASS "...your password..." + +/************************* Adafruit.io Setup *********************************/ + +#define AIO_SERVER "io.adafruit.com" +#define AIO_SERVERPORT 1883 +#define AIO_USERNAME "...your AIO username (see https://accounts.adafruit.com)..." +#define AIO_KEY "...your AIO key..." + +/************ Global State (you don't need to change this!) ******************/ + +// Create an ESP8266 WiFiClient class to connect to the MQTT server. +WiFiClient client; + +// Store the MQTT server, username, and password in flash memory. +// This is required for using the Adafruit MQTT library. +const char MQTT_SERVER[] PROGMEM = AIO_SERVER; +const char MQTT_USERNAME[] PROGMEM = AIO_USERNAME; +const char MQTT_PASSWORD[] PROGMEM = AIO_KEY; + +// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details. +Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, AIO_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD); + +/****************************** Feeds ***************************************/ + +// Notice MQTT paths for AIO follow the form: /feeds/ +// Setup a feed called 'onoff' for subscribing to changes. +const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/onoff"; +Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, ONOFF_FEED); +const char SLIDER_FEED[] PROGMEM = AIO_USERNAME "/feeds/slider"; +Adafruit_MQTT_Subscribe slider = Adafruit_MQTT_Subscribe(&mqtt, SLIDER_FEED); + +/*************************** Sketch Code ************************************/ + +// Bug workaround for Arduino 1.6.6, it seems to need a function declaration +// for some reason (only affects ESP8266, likely an arduino-builder bug). +void MQTT_connect(); + +void setup() { + pinMode(LED, OUTPUT); + pinMode(PWMOUT, OUTPUT); + + Serial.begin(115200); + delay(10); + + Serial.println(F("Adafruit MQTT demo")); + + // Connect to WiFi access point. + Serial.println(); Serial.println(); + Serial.print("Connecting to "); + Serial.println(WLAN_SSID); + + WiFi.begin(WLAN_SSID, WLAN_PASS); + while (WiFi.status() != WL_CONNECTED) { + delay(500); + Serial.print("."); + } + Serial.println(); + + Serial.println("WiFi connected"); + Serial.println("IP address: "); Serial.println(WiFi.localIP()); + + // Setup MQTT subscription for onoff & slider feed. + mqtt.subscribe(&onoffbutton); + mqtt.subscribe(&slider); +} + +uint32_t x=0; + +void loop() { + // Ensure the connection to the MQTT server is alive (this will make the first + // connection and automatically reconnect when disconnected). See the MQTT_connect + // function definition further below. + MQTT_connect(); + + // this is our 'wait for incoming subscription packets' busy subloop + // try to spend your time here + + Adafruit_MQTT_Subscribe *subscription; + while ((subscription = mqtt.readSubscription(5000))) { + // Check if its the onoff button feed + if (subscription == &onoffbutton) { + Serial.print(F("On-Off button: ")); + Serial.println((char *)onoffbutton.lastread); + + if (strcmp((char *)onoffbutton.lastread, "ON") == 0) { + digitalWrite(LED, LOW); + } + if (strcmp((char *)onoffbutton.lastread, "OFF") == 0) { + digitalWrite(LED, HIGH); + } + } + + // check if its the slider feed + if (subscription == &slider) { + Serial.print(F("Slider: ")); + Serial.println((char *)slider.lastread); + uint16_t sliderval = atoi((char *)slider.lastread); // convert to a number + analogWrite(PWMOUT, sliderval); + } + } + + // ping the server to keep the mqtt connection alive + if(! mqtt.ping()) { + mqtt.disconnect(); + } + +} + +// Function to connect and reconnect as necessary to the MQTT server. +// Should be called in the loop function and it will take care if connecting. +void MQTT_connect() { + int8_t ret; + + // Stop if already connected. + if (mqtt.connected()) { + return; + } + + Serial.print("Connecting to MQTT... "); + + uint8_t retries = 3; + while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected + Serial.println(mqtt.connectErrorString(ret)); + Serial.println("Retrying MQTT connection in 5 seconds..."); + mqtt.disconnect(); + delay(5000); // wait 5 seconds + retries--; + if (retries == 0) { + // basically die and wait for WDT to reset me + while (1); + } + } + Serial.println("MQTT Connected!"); +} \ No newline at end of file diff --git a/examples/mqtt_esp8266/mqtt_esp8266.ino b/examples/mqtt_esp8266/mqtt_esp8266.ino index d5c1f3d..c5ceac6 100644 --- a/examples/mqtt_esp8266/mqtt_esp8266.ino +++ b/examples/mqtt_esp8266/mqtt_esp8266.ino @@ -4,8 +4,9 @@ Must use ESP8266 Arduino from: https://github.com/esp8266/Arduino - Works great with Adafruit's Huzzah ESP board: + Works great with Adafruit's Huzzah ESP board & Feather ----> https://www.adafruit.com/product/2471 + ----> https://www.adafruit.com/products/2821 Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing