Opensprinklette Single!

So, found some info on the board.

Where I thought there was dual throw relay, it’s even better since the second set of terminals are a optocoupler. So, that would be grand for either of a rain gauge input, the audio trigger for dog barking, the flow rate sensor et cetera.

It is otherwise an WeMOS ESP-8266.

What is crazy is that the board thinks of everything and has bidirectional zeners on power and optical inputs so its really for light-industrial applications. That is, includes Transient Voltage Suppressors.

AND! One of the terminals is a regulated 5V output! Just exactly enough for the sound level detection for the dog barking.

Loving it!