Project Logs

Collapse

• Amazon Echo from 2015 meets X-10 from 1978!

  Hari Wiguna • 01/07/2016 at 02:08 • 4 comments

  Sketch and wiring for Arduino can be found here. I connected ESP's GPIO0 to RTS and GPIO2 to DTR of the CM17A. Each goes through TWO inverter gates (in the SN7404 TTL chip) to convert the 3.3V signals to 5V.

  The code below subscribes to MQTT button push from Adafruit.io instead of polling it from the ESP.

  I commented out the ping from loop() because it sometimes would flush the MQTT packet from the server if it pings just at the wrong time. So, I let it timeout and it would reconnect when it discovers that it's no longer connected to the server.

  I also modified Brohogan's excellent code to work on the ESP8266 by not relying on ATMega specific code.

  // Amazon Echo meets X-10
  // Hari Wiguna, 2016
  //
  // Hacked together from:
  // - Adafruit MQTT Library ESP8266 Example
  // - and http://playground.arduino.cc/X10/CM17A
  
  #include <ESP8266WiFi.h>
  #include "Adafruit_MQTT.h"
  #include "Adafruit_MQTT_Client.h"
  #include <X10Firecracker.h> // Use the modified version of this that no longer rely on ATMega specific features. -- Hari
  
  // Configurations
  #define AIO_SERVER      "io.adafruit.com"
  #define AIO_SERVERPORT  1883
  #define AIO_USERNAME    "?????"
  #define WLAN_SSID  "Firefly24"
  #define WLAN_PASS  "?????"
  #define AIO_KEY    "?????"
  
  int ledPin = 2;
  bool isDebug = false; // Don't debug if USB serial is not connected
  
  // 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 ***************************************/
  // Setup a feed called 'light' for subscribing to changes.
  const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/light";
  Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, ONOFF_FEED);
  
  /*************************** Sketch Code ************************************/
  
  void setup() {
    X10.init( 0, 2, 5 ); // 0=RTS, 2=DTR, 5=extra delay for faster ESP8266
  
    if (isDebug) Serial.begin(115200);
    delay(10);
  
    if (isDebug)
    {
      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);
      if (isDebug) Serial.print(".");
    }
    
    if (isDebug)
    {
      Serial.println();
  
      Serial.println("WiFi connected");
      Serial.println("IP address: "); Serial.println(WiFi.localIP());
    }
  
    // Setup MQTT subscription for onoff feed.
    mqtt.subscribe(&onoffbutton);
  }
  
  // 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;
    }
  
    if (isDebug) Serial.print("Connecting to MQTT... ");
  
    while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
      if (isDebug) {
        Serial.println(mqtt.connectErrorString(ret));
  
        Serial.println("Retrying MQTT connection in 5 seconds...");
      }
      mqtt.disconnect();
      delay(5000);  // wait 5 seconds
    }
    if (isDebug) Serial.println("MQTT Connected!");
  }
  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
    Adafruit_MQTT_Subscribe *subscription;
    while ((subscription = mqtt.readSubscription(3000))) {
      if (subscription == &onoffbutton) {
        if (isDebug) {
          Serial.print(F("Got: "));
  ...

  Read more »

View project log