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

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Published in 2022-11-29 23:34:49 | Show all floors |Read mode
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:
  1. root@OPZ2-NEW:~# ls /dev/*i2c*
  2. /dev/i2c-0  /dev/i2c-1
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  1. root@OPZ2-NEW:~# i2cdetect -y 0
  2.      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
  3. 00:                         -- -- -- -- -- -- -- --
  4. 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  5. 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  6. 30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
  7. 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  8. 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  9. 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  10. 70: -- -- -- -- -- -- -- --
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  1. root@OPZ2-NEW:~# i2cdetect -y 1
  2.      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
  3. 00:                         -- -- -- -- -- -- -- --
  4. 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  5. 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  6. 30: 30 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  7. 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  8. 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  9. 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  10. 70: -- -- -- -- -- -- -- --
Copy code
Here's how it works properly on Ubuntu 20.04.3 LTS:
  1. root@OPZ2-OLD:~# ls /dev/*i2c*
  2. /dev/i2c-3  /dev/i2c-5
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  1. root@OPZ2-OLD:~# i2cdetect -y 3
  2.      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
  3. 00:          -- -- -- -- -- -- -- -- -- -- -- -- --
  4. 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  5. 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  6. 30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
  7. 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  8. 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  9. 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  10. 70: -- -- -- -- -- -- -- --
Copy code
  1. root@OPZ2-OLD:~# i2cdetect -y 5
  2.      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
  3. 00:          -- -- -- -- -- -- -- -- -- -- -- -- --
  4. 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  5. 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  6. 30: -- -- -- -- -- -- UU -- -- -- -- -- -- -- -- --
  7. 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  8. 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  9. 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  10. 70: -- -- -- -- -- -- -- --
Copy code
Here the display address is visible which is 3C and I can send any commands without errors.

Thank you for your attention!

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Published in 2023-3-31 02:29:41 | Show all floors
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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Published in 2023-8-7 11:41:39 | Show all floors
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