More Raspberry Pi stuff is always nice! Just a quick suggestion, though. Link to your previous post when you mention it in your first sentence using markdown code as follows:

[In my previous post,](https://peakd.com/hive-163521/@robingreig/raspberry-pi-home-automation)

It will look like this: In my previous post,

That way, people will be able to more easily follow the process from start to finish!