Building on Rasberry Pi

[bitpow]

Hi,
I have built c-periphery, lua and lua-periphery on Rasberry Pi OS.

When I try to control the led, using the example in the lua-periphery README, I get the following error message:

Opening LED: opening 'brightness': No such file or directory [errno 2]

Additionally, when I try the GPIO example from the same README, I get the following error:

c-periphery library built without character device GPIO support.

I have built basically everything from scratch on the Rasberry Pi itself.

Is there anything I'm missing, any sanity checks, or steps I can take to avoid these error messages?

Thanks.

[bitpow]

was able to get it working using sudo luarocks install lua-periphery

However, I need to run lua with sudo in order to interface with the gpio. Wondering if there's any workarounds for that.