[BUG] ModBus Stop's working

[pchaves1]

Hello,

on the last 24 hours, my integration between HA and ModBus stopped 3 times. Never saw this problem before with other versions of HA. To recover I need to reload the integration on HA. Any advice?

Mandatory details

1. Integration Version: 2023.03.1
2. HA Version: 2023.3.4
3. Inverter Brand: Solax
4. Plugin Used: SolaX Inverter Modbus
5. First 6 digits of Serial: H4752M
6. Connection Method: ModBus TCP using WaveShare RS485 TO ETH (B)

Detailed Error Log

Logger: custom_components.solax_modbus Source: custom_components/solax_modbus/init.py:472 Integration: SolaX Inverter Modbus (documentation, issues) First occurred: 17:18:41 (17 occurrences) Last logged: 18:03:23

Something went wrong reading from modbus Traceback (most recent call last): File "/config/custom_components/solax_modbus/init.py", line 410, in read_modbus_data res = self.read_modbus_registers_all() File "/config/custom_components/solax_modbus/init.py", line 485, in read_modbus_registers_all res = res and self.read_modbus_block(block, 'holding') File "/config/custom_components/solax_modbus/init.py", line 472, in read_modbus_block val = decoder.decode_16bit_uint() File "/usr/local/lib/python3.10/site-packages/pymodbus/payload.py", line 389, in decode_16bit_uint return unpack(fstring, handle)[0] struct.error: unpack requires a buffer of 2 bytes

[wills106]

Does it indicate in your error log which register it failed on?

[pchaves1]

Yes,

Logger: custom_components.solax_modbus Source: custom_components/solax_modbus/init.py:427 Integration: SolaX Inverter Modbus (documentation, issues) First occurred: 18:41:06 (8 occurrences) Last logged: 18:41:06

SolaX: read failed at 0x10a: active_power_upper SolaX: read failed at 0x10c: active_power_lower SolaX: read failed at 0x10e: reactive_power_upper SolaX: read failed at 0x110: reactive_power_lower SolaX: read failed at 0x114: charge_discharge_power Traceback (most recent call last): File "/config/custom_components/solax_modbus/init.py", line 427, in treat_address elif descr.unit == REGISTER_S32: val = decoder.decode_32bit_int() File "/usr/local/lib/python3.10/site-packages/pymodbus/payload.py", line 429, in decode_32bit_int handle = self._unpack_words(fstring, handle) File "/usr/local/lib/python3.10/site-packages/pymodbus/payload.py", line 353, in _unpack_words handle = unpack(f"!{wc_value}H", handle) struct.error: unpack requires a buffer of 4 bytes

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Logger: custom_components.solax_modbus Source: custom_components/solax_modbus/init.py:424 Integration: SolaX Inverter Modbus (documentation, issues) First occurred: 18:41:06 (5 occurrences) Last logged: 18:41:06

SolaX: read failed at 0x131: external_generation SolaX: read failed at 0x132: external_generation_max_charge SolaX: read failed at 0x54: lock_state SolaX: read failed at 0xb8: meter_1_communication_state SolaX: read failed at 0xb9: meter_2_communication_state Traceback (most recent call last): File "/config/custom_components/solax_modbus/init.py", line 424, in treat_address if descr.unit == REGISTER_U16: val = decoder.decode_16bit_uint() File "/usr/local/lib/python3.10/site-packages/pymodbus/payload.py", line 389, in decode_16bit_uint return unpack(fstring, handle)[0] struct.error: unpack requires a buffer of 2 bytes

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Logger: custom_components.solax_modbus Source: custom_components/solax_modbus/init.py:426 Integration: SolaX Inverter Modbus (documentation, issues) First occurred: 18:41:06 (6 occurrences) Last logged: 18:41:06

SolaX: read failed at 0x9a: import_energy_today SolaX: read failed at 0xaa: meter_2_export_total SolaX: read failed at 0xac: meter_2_import_total SolaX: read failed at 0xae: meter_2_export_today SolaX: read failed at 0xb0: meter_2_import_today Traceback (most recent call last): File "/config/custom_components/solax_modbus/init.py", line 426, in treat_address elif descr.unit == REGISTER_U32: val = decoder.decode_32bit_uint() File "/usr/local/lib/python3.10/site-packages/pymodbus/payload.py", line 397, in decode_32bit_uint handle = self._unpack_words(fstring, handle) File "/usr/local/lib/python3.10/site-packages/pymodbus/payload.py", line 353, in _unpack_words handle = unpack(f"!{wc_value}H", handle) struct.error: unpack requires a buffer of 4 bytes

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Logger: custom_components.solax_modbus Source: custom_components/solax_modbus/init.py:270 Integration: SolaX Inverter Modbus (documentation, issues) First occurred: 18:43:21 (78 occurrences) Last logged: 18:44:06

SolaX: read failed at 0xac: meter_2_import_total SolaX: read failed at 0xae: meter_2_export_today SolaX: read failed at 0xb0: meter_2_import_today SolaX: read failed at 0xb8: meter_1_communication_state SolaX: read failed at 0xb9: meter_2_communication_state

[wills106]

Have you altered your Modbus Power Meter in the past couple of days? Do you have two Modbus Power Meters in your installation?

[pchaves1]

No, I did not. I only have one ModBus Power Meter. Now I'm wondering if this is not related with Tigo Optimizers. I did request Tigo Energy to add the TCP integration between my Tigo CCA and WaveShare RS485 TO ETH (B). Not sure if is related or not. I have changed the WaveShare RS485 TO ETH (B) IP address now. Let's see...

[pchaves1]

It seems the problem is on the Tigo dev team making test's for the integration (reading and sending data to the WaveShare RS485 TO ETH (B) gateway) and not on the SolaX Inverter Modbus plugin. Sorry for the time spend

[wills106]

So this issue can be closed down?

[pchaves1]

Yes please