remote_rpi_gpio broken pipe after remote machine rebooted or temporarily disconnected

[scarre]

The problem

remote_rpi_gpio is working fine until the remote machine is temporarily unavailable/disconnected from the network or rebooted.
Trying to interact with the remote gpio (e.g. switch on/off) results in error: Failed to call service switch/turn_on (/turn_off) [Errno 32] Broken pipe.
Functional connection to remote machine can only be recovered by restarting Home Assistant core.
Already reported as #45770 and closed, but apparently not solved.
#45770

What version of Home Assistant Core has the issue?

core-2021.12.9

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

remote_rpi_gpio

Link to integration documentation on our website

https://www.home-assistant.io/integrations/remote_rpi_gpio/

Example YAML snippet

switch:
  - platform: remote_rpi_gpio
    host: 192.168.xxx.xxx
    invert_logic: true
    ports:
      17: relay1
      18: relay2
      26: relay3

Anything in the logs that might be useful for us?

Logger: homeassistant.components.websocket_api.http.connection
Source: components/remote_rpi_gpio/__init__.py:54
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 14:29:54 (1 occurrences)
Last logged: 14:29:54

[2779057864] [Errno 32] Broken pipe
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 185, in handle_call_service
    await hass.services.async_call(
  File "/usr/src/homeassistant/homeassistant/core.py", line 1495, in async_call
    task.result()
  File "/usr/src/homeassistant/homeassistant/core.py", line 1530, in _execute_service
    await handler.job.target(service_call)
  File "/usr/src/homeassistant/homeassistant/helpers/entity_component.py", line 209, in handle_service
    await self.hass.helpers.service.entity_service_call(
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 663, in entity_service_call
    future.result()  # pop exception if have
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 896, in async_request_call
    await coro
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 700, in _handle_entity_call
    await result
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 948, in async_turn_on
    await self.hass.async_add_executor_job(ft.partial(self.turn_on, **kwargs))
  File "/usr/local/lib/python3.9/concurrent/futures/thread.py", line 52, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/components/remote_rpi_gpio/switch.py", line 73, in turn_on
    remote_rpi_gpio.write_output(self._switch, 1)
  File "/usr/src/homeassistant/homeassistant/components/remote_rpi_gpio/__init__.py", line 54, in write_output
    switch.on()
  File "/usr/local/lib/python3.9/site-packages/gpiozero/output_devices.py", line 229, in on
    self._write(True)
  File "/usr/local/lib/python3.9/site-packages/gpiozero/output_devices.py", line 106, in _write
    self.pin.state = self._value_to_state(value)
  File "/usr/local/lib/python3.9/site-packages/gpiozero/pins/__init__.py", line 305, in <lambda>
    lambda self, value: self._set_state(value),
  File "/usr/local/lib/python3.9/site-packages/gpiozero/pins/pigpio.py", line 267, in _set_state
    elif self.function == 'input':
  File "/usr/local/lib/python3.9/site-packages/gpiozero/pins/__init__.py", line 283, in <lambda>
    lambda self: self._get_function(),
  File "/usr/local/lib/python3.9/site-packages/gpiozero/pins/pigpio.py", line 240, in _get_function
    return self.GPIO_FUNCTION_NAMES[self.factory.connection.get_mode(self.number)]
  File "/usr/local/lib/python3.9/site-packages/pigpio.py", line 1402, in get_mode
    return _u2i(_pigpio_command(self.sl, _PI_CMD_MODEG, gpio, 0))
  File "/usr/local/lib/python3.9/site-packages/pigpio.py", line 1025, in _pigpio_command
    sl.s.send(struct.pack('IIII', cmd, p1, p2, 0))
BrokenPipeError: [Errno 32] Broken pipe

Additional information

It would probably be good to try recovering the connection ( at least a few times - 2 or 3) after a broken pipe error ,before abandoning. I think that trying to recover upon error is better than continuously monitoring the connection: it is less "invasive" and not so costly.
There are many situations where a remote machine can be temporarily disconnected from the network or rebooted, and it shouldn't require a reboot of the core to recover.
With other integrations (e.g. deconz with a remote hub), temporarily disconnecting the remote hub or rebooting it will not affect home assistant core. I understand that accessing a deconz remote hub via a web service is not exactly comparable to maintaining a TCP connection with a remote rapsberry pi; however not trying to re-establish a TCP connection when we know it is broken seems a bit "incomplete".

[probot-home-assistant]

remote_rpi_gpio documentation
remote_rpi_gpio source
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[Electronlibre2012]

Hello,

i got the same problem and see your post...thanks...

just reboot of the core is ok but your comment is great, its bad to have to reboot the Core to have the pipe alive again...

[ne0c0de]

hey guys @scarre @Electronlibre2012 how did (actually where) you setup this:

Environment = GPIOZERO_PIN_FACTORY=pigpio PIGPIO_ADDR=YOUR_RPi_IP_ADDRESS

I still couldn't find any usefull information about where to setup environment variables in home assistant

[ne0c0de]

i just ssh ed to HA and just run the export command and now it's stored in env variables,

reboot the host but still can't access the remote raspberry's gpio ports even it's configured and allowed to HA IP,

is there any magic that I should do?

[Electronlibre2012]

hello @ne0c0de ,

that was never clear for me but it works great for a while, this is what i do :

1-intall SSH & Web Terminal Addon
2-in "init_commands:" i have put

• pip3 install virtualenv
• virtualenv -p python3 env
• source env/bin/activate
• pip3 install gpiozero pigpio
• GPIOZERO_PIN_FACTORY=pigpio PIGPIO_ADDR=192.168.1.xxx
  it works...dont know exactly if its the good way to make it work...never found someone to help and give a step by step guide...i have just follow the instructions of the docs...but i am not an expert...like sometimes dont know exactly what i am doing...but it works... ;)

[github-actions]

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates.
Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍
This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.

[bergerb-com]

Same problem here. It also does that, when the GPIO is taken over by a local script.
And from what I can see, it looks like the CPU Usage is also at 100%, when that happens.

[zi3lo]

I can confirm. Problem persist, even after update to 2022.5.5. Remote gpio works with my rpi until restart this remote host. Then I have 'broken pipe' and connection doesn't resume. I have to restart home assistant to resume connection.

[benkibejs]

I was thinking of just modifying the code for https://github.com/home-assistant/core/blob/dev/homeassistant/components/remote_rpi_gpio/switch.py to restart the connection if it is broken when you do turn_on or turn_off

[meldarionqeusse]

same problem using rpiw as a binary sensor. It should at least let you know if the remote raspberry pi becomes unavailable.

[sIush]

same problem with remote GPIO as switch. If a raspberry pi reboots whole pipeline breaks. So far unusable. I was also not able to add multiple remote GPIO from different pi's.

also discussed here

[cescobaz]

I tried to solve the issue by adding a try ... except ..., the re-connection works, but the CPU load doesn't fix. So I reproduce the CPU bug with the underline lib pigpio for python, then I opened an issue joan2937/pigpio#563