Following up with the great interest of some of you, I have good news: the next revision of the Smart Plant is here, the V1R2!

In this small revision, from which I ordered a first batch of 30 units, the following minor issues were fixed:

1. The Battery Management system is now fully embedded in one board, allowing not just the charging of the battery and the 3.3V regulation with the minimum standby consumption (for the deep-sleep periods) but also monitoring the battery through the ADC port (GPIO35) of the ESP-32 and implementing diodes for protecting the charging from a solar panel and the USB-C port.
2. The light sensor on the SMD factor has been replaced with a 5mm LDR footprint through-hole (THT) solderable. However, I haven't tested all the light conditions with a standard 5-10k GL55 photoresistor, but since it is a THT component the option to replace it with a 5mm photodiode is still there.