Description
The problem
I am not sure when it started, but the past few updates have not cleared this up:
My SIMCOM_SIM800C GSM modem does not initialize anymore. I have not tested the SIM card in another device since it is the older, larger variety. If none of my pasted error logs are of any help here, I can reach out to my carrier.
What version of Home Assistant Core has the issue?
core-2025.4.4
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
SMS notifications via GSM-modem
Link to integration documentation on our website
https://www.home-assistant.io/integrations/sms
Diagnostics information
home-assistant_sms_2025-05-05T01-34-39.835Z.log
Example YAML snippet
Anything in the logs that might be useful for us?
Logger: homeassistant.components.sms.gateway
Source: components/sms/gateway.py:205
integration: SMS notifications via GSM-modem (documentation, issues)
First occurred: 6:34:23 PM (6 occurrences)
Last logged: 6:37:09 PM
Failed to initialize, error ERR_DEVICEOPENERROR
Logger: homeassistant.config_entries
Source: config_entries.py:751
First occurred: 6:04:28 PM (1 occurrences)
Last logged: 6:04:28 PM
Error setting up entry 861937069674753 for sms
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/config_entries.py", line 751, in __async_setup_with_context
result = await component.async_setup_entry(hass, self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/sms/__init__.py", line 63, in async_setup_entry
gateway = await create_sms_gateway(config, hass)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/sms/gateway.py", line 203, in create_sms_gateway
await gateway.init_async()
File "/usr/src/homeassistant/homeassistant/components/sms/gateway.py", line 31, in init_async
await self._worker.init_async()
File "/usr/local/lib/python3.13/site-packages/gammu/asyncworker.py", line 85, in init_async
await self._init_future
asyncio.exceptions.CancelledError: Global task timeoutAdditional information
No response