Irrigation / Bluetooth tap timer / SOLEM

Hi folks,
i would like to control and montitor my garden irrigation.

I use this model:

There is a python script that allegedly allows to set a watering period:
http://www.localnet.de/downloads/index.html

The optional authenticaltion (via PIN) is not implemented, apparently.

There is also an official app (Andoid / iOS).

I’m everthing else but familiar with bluetooth.
It maybe is a finger exercise for a specialist.

Wish list:
Sensor (open/closed)
Manual setting of a watering period (in minutes)
(Interface for the device schedule)

Thanks to all the people, that make this magic happen.

Cheers!