Access RPI GPIO

[Phil]

What is the best way to access the GPIO's in a plugin? 

How to we allow access without sudo?

[Teppo Kurki]

I think this is not really a plugin specific issue - googling for GPIO access without sudo brings some hits, including using pigpio.

On Fri, Mar 25, 2022 at 9:04 AM Phil <phil...@gmail.com> wrote:

What is the best way to access the GPIO's in a plugin? 

How to we allow access without sudo?

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[Susanne Coates]

I don't know if this would help you or not but I wrote a signal K plugin that lets you control LEDs (or relays) connected to the RPI's GPIO ports. You can download it here: https://github.com/susannecoates/signalk-scans-switch.
Susanne

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[Susanne Coates]

Oh, and the plugin uses the onoff library which can be installed using:
npm install onoff

[Phil begg]

Hey Susanne, Teppo

Thanks for think link - I was searching the App Store for something to related to GPIO but I probably should have looked a bit harder. 

I ended up getting a fix for this in the last couple of days. I think I had some strange permissions set up on my Pi and could not get access to the GPIO pins at all. 

Added my user to the gpio group and i2c group and it’s now all working!

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