6. Troubleshooting¶

6.1. Raspberry Pi Camera Module¶

Sometimes enabling the Raspberry Pi Camera Module in raspi-config doesn’t completely load the kernel drivers for it. If you don’t see /dev/video0 on your system, or controller.py complains about not finding it, then do the following:

Enable the kernel module for your current session:
```
pi@raspberry:~$ sudo modprobe bcm2835-vl42
```
Tell the operating system to load the kernel module at boot going forward:
```
pi@raspberry:~$ sudo cat 'bcm2835-vl42' >> /etc/modules
```

Now you should see /dev/video0 if you do ls /dev/video*