Grove RTC + OLED Display problem

Hi there,

I’m using an Arduino Uno, Grove base shield, Grove rtc, Grove 4-Channel Relay, Grove OLED Display.

  1. Problem:
    When I run the Grove RTC with a battery in it, it doesn’t work anymore. With no battery it works just fine. any suggestion?

  2. Problem:
    When I use 3 I2C devices (rtc + relay + OLED Display) the rtc stops working.


Hi nickklock

Could you provide your code and connection?
I guess the Arduino Uno does not have enough memory to support 3 I2C devices.

Best regards