Setup and Autostart in a Home Assistant Operating System Installation on RP4 that works for me

[egamper]

Prepare the Virtual Environment:

sudo mkdir /config/custom_components
sudo mkdir /config/custom_components/ca350

Copy config and script from GIT https://github.com/adorobis/hacomfoairmqtt/ to /config/custom_components/ca350
/config/custom_components/ca350/ca350.py
/config/custom_components/ca350/config.ini
Edit config.ini as needed

python3 -m venv /config/custom_components/ca350/python3venv
source /config/custom_components/ca350/python3venv/bin/activate
pip3 install paho-mqtt
pip3 install pyserial
deactivate

Create /config/custom_components/ca350/ca350runner.py:

import os
import time

pid = os.fork()

if pid > 0 :
    print("I am parent process:")
    print("Process ID:", os.getpid())
    print("Child's process ID:", pid)
  
else :
    print("\nI am child process:")
    print("Process ID:", os.getpid())
    print("Parent's process ID:", os.getppid())
    
    while True:
        print("Run ca350.py")
        os.system('source /config/custom_components/ca350/python3venv/bin/activate && python3 /config/custom_components/ca350/ca350.py')
        time.sleep(15)

Edit configuration.yaml:

shell_command:
  start_ca350: python3 /config/custom_components/ca350/ca350runner.py &

Create a HA Automation to start ca350runner.py 2 minutes after HA startup:

alias: Start Pyton3 Shell Command ca350 on HA Start
description: ""
trigger:
  - platform: homeassistant
    event: start
condition: []
action:
  - delay:
      hours: 0
      minutes: 2
      seconds: 0
      milliseconds: 0
  - service: shell_command.start_ca350
    data: {}
mode: single

[adorobis]

Many thanks for sharing that! Looks like a good candidate to start writing a wiki :)

[adorobis]

I've copied it now to a Wiki and added the FreeBSD from readme.
Many thanks!

[adorobis]

@egamper does this still work for you? I think that HA has a timeout now on shell_command of 60 seconds that cannot be changed.

[mannmawg]

@adorobis Thanks for your help!
@egamper I have the problem that shell_command stops after 60 seconds. See here

Thanks a lot
Marcus

[egamper]

Hi, it works for me. Maybe i have modified something.

My runner is now:

import os
pid = os.fork()

if pid > 0:
    print("parent")
else:
    print("child")
    os.system('source /config/custom_components/ca350/python3venv/bin/activate && python3 /config/custom_components/ca350/ca350git.py')

ca350git.py is @adorobis script. I have removed the loop since the github script i use is now more stable. Not sure if it is the last one.
I also have the "Error: Timed out running command: python3 /config/custom_components/ca350/ca350.py &, after: 60 seconds
" Error message but the child process continues to run.

[egamper]

Hi @adorobis @mannmawg , have you still problems?
I use the Generic x86-64 HA. Maybe the behavior its different on other Architectures.
I have a Serial to USB Device that does not work from Time to time. I need to power it off and on in order to make it work again. https://www.amazon.it/dp/B08L4ZFZMQ What device du you use?

[adorobis]

I have a serial port on my motherboard. The script runs on TrueNAS Core (based on FreeBSD). It is so stable that I have no willingness to try to move it anywhere else. It has never failed so far.

[Shady313FN]

Hi guys!

The script is amazing, thank you for the good work!

I have the same problem: I have a USB->Serial device which stops to work sometimes. If I run again the start script, the second instance starts to work again, but then I have two: a non-working one and a working one. I need to restart HA.

I'm running HAOS in Proxmox VM.

Have you found a solution? Or maybe could you share me a way to stop the existing non-working process or restart it from HA when it recognizes the data unavailable?

Thank you in advance!