Published June 22, 2015

#IoT made easy #ESP8266 and IFTTT (If This Then That) app

Trigger IFTTT Maker channel on a Smartphone using the IF application while feeding data events from ESP8266 ... super easy! #SENSableTHING

IntermediateWork in progress19,626

#IoT made easy #ESP8266 and IFTTT (If This Then That) app

Things used in this project

Software apps and online services

IFTTT Maker service

Story

Following the announcement of IFTTT app to support Makers with their projects through an dedicated channel, allowing them to feed event data into the great world of interaction with tons of things ... Smartphone and it's new best friend the low cost ESP8266 sensor node! (If you want to run its ESP8266 just on solar power check our solar project too)

For all the DIYers, tinkerers, and creative coders out there — we’re thrilled to introduce you to the Maker Channel. (Source: IFTTT blog)

http://blog.ifttt.com/post/121786069098/introducing-the-maker-channel

We started to explore the new channel:

Step 1

connect through your IF app (aka IFTTT) to the new Maker channel, you will receive an unique key "YOURKEY" followed by a URL to fire the "test" event, like this:

http://maker.ifttt.com/trigger/test/with/key/YOURKEY

(replace always the YOURKEY with the key the channel assigned to you)

http://maker.ifttt.com/trigger/test/with/key/YOURKEY?value1=...

(you can add up to three values per event)

Step 2

Build your recipe, use "test" when being asked for a name of your Maker channel event:

1 / 2 • Type in a caption

On the ESP8266 nodeMCU console you can run this to kick off the event:

> conn=net.createConnection(net.TCP, 0)
> conn:on("receive", function(conn, payload) print(payload) end)
> conn:connect(80,'maker.ifttt.com')
> conn:send("GET /trigger/test/with/key/YOURKEY HTTP/1.1\r\n")
> conn:send("Host: maker.ifttt.com\r\n")
> conn:send("Accept: */*\r\n")
> conn:send("User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.)\r\n")
> conn:send("\r\n")
> HTTP/1.1 200 OK
Server: Cowboy
Connection: keep-alive
X-Powered-By: Express
Content-Type: text/html; charset=utf-8
Content-Length: 44
Etag: W/"2c-4f52ca3d"
Date: Fri, 19 Jun 2015 15:48:33 GMT
Via: 1.1 vegur
Congratulations! You've fired the test event

Done!

Now you can use the URL for triggering the event in all your platforms ESP8266, Raspberry Pi, Arduino, ... attaching a sample code for the nodeMCU on ESP8266.

Btw there is also the option to send data (3 values) like add &value1=100 ...

UPDATE: The lua script has been updated and is now working, an issue was the domain name translation - now we can use the domain name.

Btw. on the Raspberry Pi simply run:

curl -X POST https://maker.ifttt.com/trigger/test/with/key/YOURKEY

print('init.lua ver 1.2')
wifi.setmode(wifi.STATION)
print('set mode=STATION (mode='..wifi.getmode()..')')
print('MAC: ',wifi.sta.getmac())
print('chip: ',node.chipid())
print('heap: ',node.heap())
-- wifi config start
wifi.sta.config("SSID","passkey")
-- wifi config end
wifi.sta.connect()
 tmr.alarm(1, 1000, 1, function()
  if wifi.sta.getip()== nil then
  print("IP unavaiable, Waiting...")
 else
  tmr.stop(1)
 print("ESP8266 mode is: " .. wifi.getmode())
 print("The module MAC address is: " .. wifi.ap.getmac())
 print("Config done, IP is "..wifi.sta.getip())
 -- dofile ("ifttt.lua")
 end
end)

port = 80
gpio.mode(1, gpio.OUTPUT)

function sendData()
  
t1=adc.read(0) -- reads value from Analog Input (max 1V)

-- conection to IFTTT channel
print("Sending data to IFTTT channel")
conn=net.createConnection(net.TCP, 0) 
conn:on("receive", function(conn, payload) print(payload) end)
conn:connect(80,'maker.ifttt.com') 

conn:on("connection", function(conn, payload) 
	print("Connected, sending event")
        conn:send("GET /trigger/test/with/key/YOURKEY?value1="..t1.." HTTP/1.1\r\n")
        conn:send("Host: maker.ifttt.com\r\n")
        conn:send("Accept: */*\r\n")
        conn:send("User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.)\r\n")
        conn:send("\r\n")
        
        -- flash LED GPIO5 0.5 sec to indicate send
        gpio.write(1, gpio.HIGH)
             tmr.alarm(1, 500, 0, function()
                gpio.write(1, gpio.LOW)
             end)
    end)

conn:on("sent",function(conn)
        print("Closing connection")
        conn:close()
    end)

conn:on("disconnection", function(conn)
        print("Got disconnection...")
    end)

end

-- send data every X ms to thing speak
tmr.alarm(0, 50000, 1, function() sendData() end )