Orange Pi Zero2 - I2C does not work after Ubuntu 20.04.3 LTS

TedNukem · Published in 2022-11-29 23:34:49

This post was finally edited by TedNukem at 2022-11-29 23:37

Hello!

This is my first topic. Sorry if I'm writing in the wrong place or I haven't been able to find a similar topic!

No matter Ubuntu or Debian, no matter which version, after Ubuntu 20.04.3 LTS, I2C does not work.
The i2cdetect command does not detect my device ( I2C Display ).
All newer versions of Ubuntu and Debian:

root@OPZ2-NEW:~# ls /dev/*i2c*
/dev/i2c-0 /dev/i2c-1

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root@OPZ2-NEW:~# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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root@OPZ2-NEW:~# i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: 30 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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Here's how it works properly on Ubuntu 20.04.3 LTS:

root@OPZ2-OLD:~# ls /dev/*i2c*
/dev/i2c-3 /dev/i2c-5

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root@OPZ2-OLD:~# i2cdetect -y 3
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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root@OPZ2-OLD:~# i2cdetect -y 5
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

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Here the display address is visible which is 3C and I can send any commands without errors.

Thank you for your attention!

stallion · Published in 2023-3-31 02:29:41

same problem here after moving from buster to bullseye: Orangepizero2_3.0.6_debian_bullseye_desktop_xfce_linux5.16.17.img , i2c 0 and 1 instead of i2c 3 and 5, anyone can help ?

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