You're welcome! You might also be interested in MicroPython (if you write python) which runs pretty solid on esp32 and has a lot of batteries included. You can almost forget you're running on a micro.
This is a link to the exact one I bought since you asked: https://www.ebay.com.au/itm/283082902927 (not actually branded TTGO, it's a clone)
Why you might like it:
- it has an OLED screen on the board for debugging and status output
- it has a battery holder and charging circuitry for an 18650 on the back of the board for portable powering/"UPS"
- it breaks out all the GPIO lines onto pins
Why you might not like it:
- like many esp32 dev boards it's slightly too fat to go straight into a standard breadboard. You have to join two breadboards to get access to both rows of pins.
[0] https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-sou...