Nice project. Even though some items are in a language I do not understand, the sketch provided me with a better understanding of the MySensors work. Thank you for making the connection of what I know and what I was having trouble understanding.
@DeepCore That is a need looking design. Did you consider using an alternative power supply other than usb? My Pi can't handle a lot of usb devices power wise, so I'm using a powered usb hub. But the wife doesn't like it, it's messy xd
The output of the display could also be sent over serial, but the whole idea is you can walk around with the doctor and improve your results as you go.
@pbw a gateway's function is to act as a gateway between the nodes and a controller. I don't think you will have all of the needed memory available to add logic to the gateway and you will make your solution very static.
You can implemented your own lightway controller, just have a look at the Serial API. But controllers like Domoticz are lightweight and the already over a browser based interface. And most of them are easy to setup creating a much more versatile and dynamic solution.
@Kokosnoot good solution. I remember the discussion in the early days of MySensors. I've powered the radio's for most of my sensors from the 3.3v regulator on the arduino board and for me that works perfect. But for my latest designs I decided to add a separate ams regulator for my radio's like the guys suggested in the beginning. Because you basically want the on board regulator to power the mcu only.