I use a small DS3231. It’s very small and works great.
2 Likes
Same here. I also soldered the wires directly onto the Pico. It works perfectly.
Apparently the battery was dead (0.9v). Made it so I never have to worry about RTC batteries again.
Ideally I should’ve gotten battery power from C102 near the AXP chip, but that looked risky…
Also: if anyone has problems with their keyboard not showing up after the mod, check picocalc_keyboard.ino: wait a bit before initializing i2c by prokrypt · Pull Request #18 · clockworkpi/PicoCalc · GitHub and try the keyboard firmware I compiled.
3 Likes