unfortunately these batteries do not allow me to measure the voltage and understand the state of charge, I should measure the current.
I was thinking of verifying the time spent in each operational phase (wake, connection, transmission) and adding the consumptions or an average of the consumptions ...

That is an interesting battery, exactly delivering the absolute maximal rating input voltage to the ESP32
Yes it is !
If you look it’s datasheet you will see the behaviour and as I have understand, it give 3.6V until the end of his life.
so I can't rely on the remaining mV, but I have to ...

Actual voltage is 3528 mV. But is a particular battery, you don’t see a realistic voltage decrease, you read a voltage around 3.6V until battery id near the end, after that the voltage drop down ( you have some oscillation of reading).
I’m also trying to discover a system to control the state of ...

Hi,
I've got an esp32 module soldered on my pcb, with a minimal circuit and with 2 transistor for auto reset .
I'm under Arduino .
The sketch put esp32 in deep sleep and there's a wake with 2 ext interrupt + timer wake every minutes.
I'm trying to measure the power consumption and also if I'm ...