Just in case anyone wants a test board based on the little white ESP-120 Module, here's some ideas... (KiCad)

The board can be used for testing and programming the ESP-201 module... It's pretty much the same as a board I found when googling but aimed at testing inertia sensor using the ADC... All files available on request...

The unit is powered by USB and contains a Buzzer, RGB Led and a Piezo sensor...

The USB circuitry (CH340B) is under the ESP201 (little white board module).

Note my design for the sensor, it's a standard inexpensive piezo disk modified to greatly enhance it's performance when used as a sensor... the design can out perform sensors costing many tens of dollars...

I managed to replaced a $34 sensor with a $2 sensor and small weight connected to a piece of wire soldered to the disk... Additionally, if the weight is resting lightly on a surface (such as a window or door frame), vibration is transmitted directly again greatly improving detection...

Updated version:

includes on-board SD reader, USB to Serial CH340B, AtMega328, Inertia sensor for AD testing etc... Will probably redo this for through-hole as it's easier to build... I've yet to test it so don't be surprised if I screw up and I have still to add the TFT for debug...

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