WARNING:root:Failed to scrape inverter, sleeping until next scan

[shannonpasto]

Hi.

I've started seeing the following error after upgrading the repo.

INFO:root:Loaded config sungrow-sg5kd
INFO:root:Creating SungrowModbusTcpClient
INFO:root:Connecting
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 40441)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 48495)
INFO:root:Connected
INFO:root:No MQTT configuration detected
INFO:root:No Prometheus configuration detected
INFO:root:No InfluxDB configuration detected
INFO:root:Configured PVOutput Client
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 59731)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 44457)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 33161)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 60073)
DEBUG:pymodbus.transaction:Current transaction state - IDLE
DEBUG:pymodbus.transaction:Running transaction 1
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 43245)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 46709)
DEBUG:pymodbus.transaction:SEND: 0x0 0x1 0x0 0x0 0x0 0x6 0x1 0x4 0x13 0x88 0x0 0x64
DEBUG:pymodbus.client.sync:New Transaction state 'SENDING'
DEBUG:pymodbus.transaction:Changing transaction state from 'SENDING' to 'WAITING FOR REPLY'
DEBUG:pymodbus.transaction:Transaction failed. ([Errno 104] Connection reset by peer)
DEBUG:pymodbus.framer.socket_framer:Processing:
DEBUG:pymodbus.transaction:Getting transaction 1
DEBUG:pymodbus.transaction:Changing transaction state from 'PROCESSING REPLY' to 'TRANSACTION_COMPLETE'
WARNING:root:Modbus connection failed
WARNING:root:Failed to scrape inverter, sleeping until next scan
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 48387)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 36045)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 50981)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 36889)
DEBUG:pymodbus.transaction:Current transaction state - TRANSACTION_COMPLETE
DEBUG:pymodbus.transaction:Running transaction 2
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 58809)
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('172.16.100.1', 55761)
DEBUG:pymodbus.transaction:SEND: 0x0 0x2 0x0 0x0 0x0 0x6 0x1 0x4 0x13 0x88 0x0 0x64
DEBUG:pymodbus.client.sync:New Transaction state 'SENDING'
DEBUG:pymodbus.transaction:Changing transaction state from 'SENDING' to 'WAITING FOR REPLY'
DEBUG:pymodbus.transaction:Changing transaction state from 'WAITING FOR REPLY' to 'PROCESSING REPLY'
DEBUG:pymodbus.transaction:RECV: 0x0
DEBUG:pymodbus.framer.socket_framer:Processing: 0x0
DEBUG:pymodbus.factory:Factory Response[0]
ERROR:pymodbus.factory:Unable to decode response Modbus Error: Unknown response 0
ERROR:pymodbus.transaction:Modbus Error: [Input/Output] Unable to decode request
Traceback (most recent call last):
File "/usr/local/.venv/lib/python3.11/site-packages/pymodbus/transaction.py", line 208, in execute
self.client.framer.processIncomingPacket(response,
File "/usr/local/.venv/lib/python3.11/site-packages/pymodbus/framer/socket_framer.py", line 165, in processIncomingPacket
self._process(callback, error=True)
File "/usr/local/.venv/lib/python3.11/site-packages/pymodbus/framer/socket_framer.py", line 175, in _process
raise ModbusIOException("Unable to decode request")
pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] Unable to decode request
WARNING:root:Modbus connection failed
WARNING:root:Failed to scrape inverter, sleeping until next scan
^CTraceback (most recent call last):
File "/root/solariot/./solariot.py", line 612, in
time.sleep(config.scan_interval)

I can confirm that the inverter is available...

root@debone:~/solariot# telnet 172.16.100.77 502
Trying 172.16.100.77...
Connected to 172.16.100.77.
Escape character is '^]'.

I suspect this has something to do with the version of SungrowModbusTcpClient but I am unable to downgrade due to issues with pycrypto.

I'm running this on Debian 12

Any ideas what might be causing this?

Thanks

[michael-robbins]

Sorry been ages since I've checked this repo, but what model do you have, does it always happen or just sometimes?

If you're running this in docker you can clone the repo, tweak the versions then:

docker build -t myimage:latest .
docker run -it --rm --name solariot -v myconfig.py:/config/myconfig.py myimage:latest

Something like the above, and that'll let you quickly iterate on versions/code/etc to try debug.

I've got that inverter model (based on the sg5kd in the logs) as well and can't recall many issues, is your scan interval really low? (like 1-5 seconds), could you back it off to like 30s/etc?