David Königsmann

Are you able to uncomment line 5 in one of the units and look at the serial monitor? I suspect it will show that the units are not correctly waking...

You can think of SMD capacitors as normal ones. For our use case you only need to match the size (0805), capacity (22μF) and voltage (>=10V). C5 is a tiny...

> Hi Dave, i also wanted to use jclpcb and their soldering service. At the moment they are short of C2 and U4. Am I right I can replace C2...