@radhoo I received the A2 yesterday. It works great, and I’m glad to see that the temperature/pressure sensor is already installed. Thanks!

But that reminds me to install the BME on the Kit1, get back to trying to update the firmware and start adding features to it. So as a first step I tried to reproduce a working build. I started with the latest code from github, forked it, and wrote a Makefile to build it on Linux. I got a firmware built, flashed it, and it kindof works but some characters on the display are garbled, while others aren’t. It also doesn’t appear to have a functioning web server – it gets connected to the network but doesn’t respond when I try to connect from my browser. Today I fixed all the compiler warnings; that didn’t help. My fork is here https://github.com/ec1oud/uradmonitor_kit1

Any ideas? Has anyone managed to rebuild the firmware and start hacking yet?

Fortunately I downloaded the original firmware from the chip, so I can restore it and have it working again. That shows that there is no problem with the hardware or the fuses being set in prog.sh – it’s just a bug in the open-source version of the firmware, or that it compiles differently with my version of avr-gcc than it does with Radhoo’s version, or something like that.