RPi.GPIO does not work within pyscript

[Jelle7]

I am trying to do a complex automation in HA, running on a raspberry pi 4 as HA OS. The automation involves running a python script which imports the RPI.GPIO package to control a RF module on the PI which has HA installed.

For some reason, importing the package and running it is no problem but it does not seem to actually send stuff to my RPI GPIO pins. I know there is a GPIO package for 455Mhz on HACS but it sends a number while I need to send something in binary. See my script below:

import time
import sys
import RPi.GPIO as GPIO
command = {
    'up': '1101101010010011111',
    'down': '1101101010010011000',
    'stop': '1101101010010011101'
}
short_delay = 0.00035
long_delay = 0.00070
extended_delay = 0.015212

NUM_ATTEMPTS = 15
TRANSMIT_PIN = 23

@state_trigger("input_select.shutter_state")
def shutter_action(trigger_type=None, var_name=None, value=None):
    move_shutter(value)

@service
def move_shutter(action):
    '''Transmit a chosen code string using the GPIO transmitter'''
    code = command.get(action)
    log.info(f"Action: {action}, Code: {code}")
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(TRANSMIT_PIN, GPIO.OUT)
    for t in range(NUM_ATTEMPTS):
        for i in code:
            if i == '1':
                GPIO.output(TRANSMIT_PIN, 0)
                time.sleep(long_delay)
                GPIO.output(TRANSMIT_PIN, 1)
                time.sleep(short_delay)
            elif i == '0':
                GPIO.output(TRANSMIT_PIN, 0)
                time.sleep(short_delay)
                GPIO.output(TRANSMIT_PIN, 1)
                time.sleep(long_delay)
            else:
                continue
        GPIO.output(TRANSMIT_PIN, 0)
        time.sleep(extended_delay)
    GPIO.cleanup()

[craigbarratt]

First, you shouldn't use time.sleep() in pyscript since it will block HA's main event loop. You should use task.sleep() instead.

I'm not familiar with RPiGPIO. You might try putting the body of move_shutter into a new function with a @pyscript_executor decorator. That will make it compiled python code and it will be run in a separate task. In that case, it's ok to use time.sleep(). You will have to remove any pyscript-specific functions like log.info().

[alexwhittemore]

AFAIK, if you're using HaOS, this python will be executed inside a container that doesn't have access to host resources such as the filesystem RPI.GPIO uses. Also, I believe HaOS uses a custom linux distribution that isn't raspberry pi OS and isn't necessarily compatible in any particular way, so I wouldn't be surprised if RPI.GPIO simply doesn't and can't work in that context.

I'd love to know if I'm very wrong about any of that, but do you know for sure that this setup SHOULD work? My guess is you probably need to wipe your pi, install raspberry pi OS, then install home assistant on top of that without HaOS or containerization.

[Jelle7]

@alexwhittemore I think your assumptions are quite right. It runs in a container and does not have access to the underlying OS/hardware.

The way I am doing it now is through a secondary RPI and calling my rpi.gpio script with HA ssh command execution. Works perfectly but I do need 2 RPI's at this point which is a bit annoying.