I2C-12 and I2C-13 are the DDC channels of the HDMI outputs -> not of interest to you.Hello! I am been trying to make a robot with Raspberry Pi 5 and been running into proplems with I2C detection. It worked before detecting a camera that was directly connected to Raspberry. But now when there is more added systems on a breadboard that should show up, do not. I do not know how to precisely describe the proplem so I will show some information when running certain commands.
i2cdetect -l
i2c-1 i2c Synopsys DesignWare I2C adapter I2C adapter
i2c-13 i2c 107d508200.i2c I2C adapter
i2c-14 i2c 107d508280.i2c I2C adapter
i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
i2cdetect -y 13
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: -- -- -- -- -- -- -- 37 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: 50 -- -- -- 54 -- -- -- -- -- -- -- -- -- -- --
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77
i2cdetect -y 14
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: -- -- -- -- -- -- -- -- 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77
pinctrl get 2-3
2: a3 pu | hi // GPIO2 = SDA1
3: a3 pu | hi // GPIO3 = SCL1
I am pretty new with working on Raspberry but the wiring should be right on the breadboard and I have enabled I2C from raspi-config. I have found similar cases but they have not been as helpful.
What do you add to the I2C interface? Add one sensor at a time in case you're dealing with breakout boards - especially those with pull-ups mounted.
Statistics: Posted by aBUGSworstnightmare — Tue Jul 29, 2025 1:38 pm