RTC stop working with button cell

[Shadowboxer]

can you test with our arduino source code of DS1307? do you write your own arduino code or config by ESPHome?
if want have good RTC, suggest chose KC868-A6v3 , new V3 board use by DS3231 RTC chip, not use DS1307 again.

I do write most of my own arduino code and I tried your source code for DS1307 too without any success. I don't use ESPHome.

So I flashed one of the boards with micropython this morning and for some reason I can set the time correctly and the get time function works as expected too. If I can get a few more micropython functions up & running is it OK to post them on the forum?