JuraszekL

Thank you for your reply. Unfortunately, I don't have that much time to delve into it at the moment (I thought it would be easier to explain). I will come back to this topic as soon as possible.

Hello Community! I am struggling with assigning numbers to I2C buses in my BPi, doing the same(?) thing in two different ways i am getting two different results. By default, there is only /dev/i2c-0 node available, AFAIK because HDMI uses this bus. 1. Using build-in overlay for i2c0 bus (overlays=i2c0 in /boot/armbianEnv.txt) enables another i2c bus. In this case, /dev/i2c-0 is the bus connected to pins 3 and 5 at 40-pin header. The other bus (enabled by default) becomes /dev/i2c-1. It doesn't matter how many times i reset my board, assignment doesn't change. 2. The second way is to create my own overlay by cloning this code and compiling it with armbian-add-ovelray command. It also enables another i2c bus. However, in this case the buses are swapped, /dev/i2c-0 doesn't change, the newly created bus is /dev/i2c-1 and works fine with sensors connected to pins 3 and 5. This enumeration also doesn't change after reboot. Can someone tell me why does it happens? Does the cod for build-in overlay differ from the shared one? Please, be patient for newbie user Here is the version: cat /etc/armbian-release # PLEASE DO NOT EDIT THIS FILE BOARD=bananapim2zero BOARD_NAME="Banana Pi M2 Zero" BOARDFAMILY=sun8i BUILD_REPOSITORY_URL=https://github.com/armbian/build BUILD_REPOSITORY_COMMIT=7184c5aa8 LINUXFAMILY=sunxi ARCH=arm BOOT_SOC= IMAGE_TYPE=stable BOARD_TYPE=csc INITRD_ARCH=arm KERNEL_IMAGE_TYPE=zImage KERNEL_TARGET=legacy,current,edge KERNEL_TEST_TARGET=current FORCE_BOOTSCRIPT_UPDATE= FORCE_UBOOT_UPDATE= OVERLAY_DIR="/boot/dtb/allwinner/overlay" VENDOR="Armbian" VENDORDOCS="https://docs.armbian.com" VENDORURL="https://www.armbian.com/" VENDORSUPPORT="https://forum.armbian.com" VENDORBUGS="https://www.armbian.com/bugs" BOOTSCRIPT_FORCE_UPDATE="no" BOOTSCRIPT_DST="boot.cmd" VERSION=25.2.2 REVISION=25.2.2 BRANCH=current