Hi, I have a DS1307 RTC and a OPT3001 Lux sensor on the same I2C bus.
I2C Pull-ups are 3K3 and pulled up to 5V. The problem is very often when I switch off my board and switch on again, I find the DS1307 back to initialised state (seconds showing 80) and date is 0-0-0. I tried many things, changing pull-up values, decoupling capacitors, staggering the RTC and Lux functions etc. But nothing is working. Can anyone advise ? Thank you! Royce Pereira.
