I'm building a quick voltage monitoring system to keep track of the voltage in the supercaps over time.

I'll post more about it but in short here's the setup:

- Battery-powered ESP32 reading voltages from time to time

- Posting these values over Wifi to a flask server which adds this to a local database (a CSV file for now)

- Another flask page plots the value using bokeh

The most interesting thing I discovered is how crappy the ESP32 built-in ADCs are, just these the difference between the values coming from them and the ones coming from a ADS1115 module:

I know it's news to nobody but it cam as a shock nevertheless.

Now that I have new test boards with some issues with the photodiodes fixed (see here: https://x.com/AtelierLelu/status/1806791392288543119) I'll be able to do more tests.

I'm also revisiting the daytime detection mechanism using  low power voltage supervisors.