Many thanks to my friend and colleague Dylan who was so kind to mill this printed circuit board, as he did for the transmitter earlier!
Bottom view before assembly
Top view after assembly. Note that on the ESP32-DevKitC V4 capacitor C15 was removed, as documented here.
Wires connected and operational. Note the processor board receives power from USB here, so J2 is not connected.
The box (open).
The box (closed).
