# VOXL2 I2C error

Source: https://forum.modalai.com/topic/3146/voxl2-i2c-error
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2024-02-25 23:41:24 UTC by czarsimon
Replies: 1 · Views: 706

## czarsimon · 2024-02-25 23:41:24 UTC

Hi, I'm using a brand new VOXL 2 flashed with 1.7.1 and I'm having issues using I2C on port number 5. I've been able to use it without problems in the past, but all of a sudden I'm not seeing any devices on it when running `i2cdetect -r -y 5` and I'm getting the following error messages in the kernel log; this is happening with any I2C device on the port:
```
[   14.043169] i2c_geni 990000.i2c: Bus arbitration lost, clock line undriveable
[   14.043364] i2c_geni 990000.i2c: Bus proto err, noisy/unepxected start/stop
[   14.043492] i2c_geni 990000.i2c: i2c error :-71
```

## Reply by Alex Kushleyev (ModalAI staff) · 2024-02-27 15:42:21 UTC

@czarsimon , can you please clarify where you have your device plugged in (based on the connector definitions here : https://docs.modalai.com/voxl2-connectors/)