Application virtualization, IoT and Cloud Computing, Blog of Sacha Thomet

ifttt

Control MyStrom smart plug by a trigger (ifttt or octoblu)

mystromSome weeks ago I bought my first smart plug from MyStrom. If you are living  in Switzerland you have only a limited choice of smart plugs because of the non EU standard plug (T13).

MyStrom is pretty cool because it mets almost all my requirement, there is a possibility to measure to power consumption within two rates (day and night), it’s controllable with the mobile phone app and there is a nice web interface.

But one thing I miss, I cannot react to triggers and power of the smart plug on a defined event. Like already in an earlier post mentioned there is a REST API which allows to control the plug from the internal network. (See Another LaMetric IoT script – power control)

Last day’s I just found the API documentation which allows to control the MyStrom out of the cloud:
https://mystrom.ch/mobile/ 

So I have now all to connect this Thing to the Internet and react on a trigger.

Possibility 1: The everything imaginable way,
MyStrom and Octoblu

mystromlogo      +      ocoblu

If you are using Octoblu beta, which is currently available for everyone for free you can create very intelligent workflows to control your smart plug. You can react to twitter and power of or on depending what is twittered, you can power off your heater as soon a temperature is reached, you can stop charge as soon your device have a defined state of charge.

The Things you connect use with Octoblu are nearly infinite.

mystrom-octoblu

Octoblu is for advanced use, and to be honest I’m also on the learning phase! I do not describe here more details for this case. There are a lot of sample blueprints on https://www.octoblu.com .  Octoblu was acquired by Citrix in 2015.

Possibility 2: The easy way,
MyStrom and IFTTT

 mystromlogo      +      iftttlogo

This way is suitable for “Home use” and for people who only want to create a simple workflow where a trigger initiate for example a Power On or Power Of of the smart plug.

All what you need is a Control-Script on a Webserver with PHP on the Internet, and a IFTTT account.

How it works: The script is very simple, it just handle the  authentication process on the API, read the AuthToken out of the JSON answer and Push out the payload with the AuthToken. IFTTT just take the trigger and call the script with the username, passwort and the payload which you can build from the API

Example: I want to control my smart plug by twitter, if I twitter #lightsoff

Step 1:

Take this script and put it on your webserver:

<!--?php 



/*
V0.1 by Sacha Thomet, www.appcloud.ch, 12-2015



This script can be used to control the MyStrom power outlet with IFTTT.
In IFTTT you need to take the MAKER component to make a web request.



The script must be called with 3 parameters:
- Your MyStrom username (email)
- Your MyStrom password
- the decided payload
 e.g. ../device/switch?on=true%id=64002D012305 to turn on your device with Mac 64002D012305



 Documentation of all API calls: https://mystrom.ch/mobile/
 Attention! You need to replace in your payload all "&" with a "%" !!



 Example:
 myStromAuthenticator.php?email=joe.doe@gmail.com&password=mysecreatword&payload=https://mystrom.ch/mobile/device/switch?on=true%id=64002D012305



*/



//create variables from parameter
$email = ($_GET&#91;"email"&#93;);
$password = ($_GET&#91;"password"&#93;);
$payload = ($_GET&#91;"payload"&#93;);



//myStrom host with the parameters to gather the AuthToken
$host = "https://mystrom.ch/mobile/auth?email=$email&password=$password";
$filestring = file_get_contents($host); 



//format the AuthToken that only the token remain from the JSON Answer
$startpos = 0;
while($pos = strpos($filestring, "authToken", $startpos))
{
 $string = substr($filestring, $pos, strpos($filestring, "name", $pos + 1) - $pos); 



 //echo $string. " ";
 $newstring = str_replace("authToken","","$string");
 $newstring2 = str_replace('"',"",$newstring);
 $newstring3 = str_replace(":","","$newstring2");
 $authCode = str_replace(",","","$newstring3");



 echo " AuthCode is $authCode 
" ;



 $startpos = $pos + 1;
} 



// Because & cannot submitted in a $_GET we subsitute it with a %
$correctpayload = str_replace("%","&","$payload");



echo "Full payload is: $correctpayload&authToken=$authCode";



$fullpayload = "$correctpayload&authToken=$authCode";
$payloadString = file_get_contents($fullpayload); 



?-->

Step 2:

Create a recipe on IFTTT, use Twitter as Trigger and Maker as Action. In maker you create your request:

[yourwebserver]myStromAuthenticator.php?email=[youraccountemail]&password[yourpassword]&payload=[yourpayload]

e.g. the payload to turn of the device with Mac 64002D012325 is: https://mystrom.ch/mobile/device/switch?on=false%id=64002D012325

The result should be that:

mystrom-ifttt-572x1024

You create 2 of those recipies, one to Power On and one to Power Off

Now you can twitter you defined hashtags to control your smart plug.