Build Instructions

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• 1

  Step 1

  Wire the ESP-01 as follows. Go ahead and leave your TTL converter connected so you can continue programming and debug.

• 2

  Step 2

  Connect your ESP-01 to your TTL serial converter and flash your ESP-01 with NodeMCU

  
  

  Follow Marc's good instruction on how to load NodeMCU onto your ESP-01 at https://importhack.wordpress.com/2014/11/22/how-to-use-ep8266-esp-01-as-a-sensor-web-client/

  ESPlorer is a great way to program the ESP-01. Get ESPlorer IDE running, so you can access and program the ESP-01.

  http://esp8266.ru/esplorer/
  

• 3

  Step 3

  Program your ESP with the following code -

  Change the ip address of the M:connect command to match the ip address of your MQTT broker.

  -- Garage Door controller version 2/15/15 pete@hoffswell.com
  -- GPIO0 is connected to switch with internal pulldown enabled  
  gpio.write(3,gpio.LOW)
  gpio.mode(3,gpio.INPUT,gpio.PULLDOWN)  
  --GPIO2 is connected to Relay
  gpio.mode(4,gpio.OUTPUT)  
  gpio.write(4,gpio.HIGH)  
  
  print("Program Start")
  
  -- Start up mqtt
  m = mqtt.Client("ESP1", 120, "user", "password")
  m:lwt("/lwt", "offline", 0, 0)
  m:connect("192.168.15.22", 1883, 0, function(conn) print("mqtt connected")
     m:subscribe("openhab/garage/relay1",0, function(conn) print("subscribed relay1") 
     end)
  end)
  
  -- Reconnect to mqtt server if needed
  m:on("offline", function(con) print ("reconnecting...")
     tmr.alarm(1, 10000, 0, function()
        m:connect("192.168.15.22", 1883, 0, function(conn) print("mqtt connected")
           m:subscribe("openhab/garage/relay1",0, function(conn) print("subscribed relay1") 
           end)
        end)
     end)
  end)
  
   -- Switch Trigger
  gpio.trig(3, "both",function (level)
     state = gpio.read(3)
     m:publish("openhab/garage/switch1",state,0,0)
     print("Sent openhab/garage/switch1 " .. state )    
  end)
  
  -- MQTT Message Processor
  m:on("message", function(conn, topic, msg)   
     print("Recieved:" .. topic .. ":" .. msg)   
     if (msg=="GO") then  -- Activate Door Button
        --print("Activating Door")   
        gpio.write(4,gpio.LOW)  
        tmr.delay(1000000) -- wait 1 second
        gpio.write(4,gpio.HIGH)  
     else  
        print("Invalid - Ignoring")   
     end   
  end)  
  

  
  

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