Rúben Ferreira

It started working after running the following commands: sudo modprobe rtc-ds1307 echo ds1307 0x68 | sudo tee /sys/class/i2c-adapter/i2c-7/new_device Thank you for help.

It already detected i2c-7. I think the problem was in the line "overlay_prefix=rockchip", it was commented in the file /boot/armbianEnv.txt. After that, the i2c-7 already detected, but the rtc module doesn't set datetime when the rock4cplus boots without Internet. Do you have any suggestion? Thank you for your help.

I changed the /boot/armbianEnv.txt with overlays=i2c1 i2c2 rk3399-i2c7 but it continues without detect i2c-7 or i2c-1.

Hello everyone, I’m trying also to connect the RTC ds1307 in RockPi4C+, but it isn’t detecting by I2C. Informations: RTC ds1307 used: https://www.seeedstudio.com/Pi-RTC-DS1307.html Armbian OS version: 25.2 Kernel version: 6.12.10-current-rockchip64 i2c-7 enabled on armbian-config (> System > Kernel > SY210 > rockchip-rk3399-i2c7) When I run the command: sudo i2cdetect -y 7 shows the error Error: Could not open file /dev/i2c-7' or /dev/i2c/7’: No such file or directory When I run the command: sudo i2cdetect -l shows: i2c-0 i2c rk3x-i2c I2C adapter i2c-3 i2c rk3x-i2c I2C adapter Is someone can help to solve this problem? Thanks