I want to add more temperature sensors (and some other things, but stick to it now) to my existing system using a PiHome gw. I thought I will use My Slim 2AA Battery Node for that. So I downloaded the files from openhardware.io My kicad (version 8.0.7+dfsg-2~bpo12+1) cannot open the project, as there is no .kicad_pro file. Before I start recreating it from the PDF and gerber files, is there a way to load it into kicad anyway?
I plan to get assembled boards from pcbgogo (I am told many times not to touch a soldering iron, and I have to admit they were right). Where can I find a good description of that workflow with kicad?
Am I right in my hypothesis that to actually make a temperature sensor out of this board, I need to solder a temperature sensor to some of the legs, and add the right code to the sketch? Where can I find a description of it (which sensor to use on which legs, what to add to the sketch)?
It was maybe 20 years ago I have last programmed an atmel processor, and I am afraid of the steep lelearning curve. Even computers have changed a lot since, my laptop have no paralell or serial port. I do have an USB-serial converter. How could I bootstrap the system most easily with minimal hardware for the programmer? I am on Linux, so an example avrdude command line with the description of hardware (or a link to a howto) would help.
Thanks for the help.