CRC validation failed: Sofar HYD-5000-EP

[Excalibur83]

Issue related to

Sunsynk / mbusd Home Assistant Add-On using solarman parameter (Sofar-solar inverter HYD-5000-EP with WifiStick)

Describe issue

IP static address, port 8899 (scanned and opened, ping from VM running HA returns ok)
After many attempts, changing "scheduled", "gap", "sensors"... console returns every time a CRC fault :
"

08:11:54 INFO Connecting to tcp://192.168.0.220:8899
08:11:54 INFO Reading startup sensors Rated power, Serial
08:11:54 ERROR Error retry attempt(0): CRC validation failed.
08:11:56 ERROR Error retry attempt(1): CRC validation failed.
08:11:58 ERROR Error retry attempt(2): CRC validation failed.
08:12:00 ERROR Error retry attempt(3): CRC validation failed.
08:12:02 ERROR Error retry attempt(4): CRC validation failed.
(...)
08:12:15 ERROR OSError reading 5 registers from 3: Failed to read register 3; timeout reading 2 registers from 16
"
.... and again and again till it restarts once or more

Environment

• Home Assistant version: 2024.3.3
• Addon:
  • Name: sunsynk-multi
  • Version: 202
• Inverter:
  • Make: Sofar Solar
  • Model: HYD-5000-EP
  • Firmware: v40022-00-021
• Adaptor details:
  • WifiStick LSW3
  • Firmware: LSW3_15_270A_1.68

You configuration

DRIVER: solarman
INVERTERS:
  - SERIAL_NR: SMxxxxxxxx3
    HA_PREFIX: SS
    MODBUS_ID: 1
    DONGLE_SERIAL_NUMBER: "123456789"
    PORT: tcp://192.168.0.220:8899
SENSOR_DEFINITIONS: single-phase
SENSORS:
  - battery_soc
  - Inverter power
  - Load power
  - PV1 power
  - PV1 voltage
  - PV2 power
  - PV2 voltage
  - Day Active Energy
  - Fault
  - Overall state
SENSORS_FIRST_INVERTER: []
MANUFACTURER: Sofar
READ_ALLOW_GAP: 2
READ_SENSORS_BATCH_SIZE: 5
SCHEDULES:
  - KEY: W
    READ_EVERY: 120
    REPORT_EVERY: 120
    CHANGE_ANY: false
    CHANGE_BY: 50
    CHANGE_PERCENT: false
NUMBER_ENTITY_MODE: auto
MQTT_HOST: core-mosquitto
MQTT_PORT: 1883
MQTT_USERNAME: mqtt-user
MQTT_PASSWORD: Mypassword
DEBUG_DEVICE: /dev/ttyS0
DEBUG: 0

Logs

08:26:04 WARNING Retrying individual sensors: ['serial', 'rated_power']
08:26:15 ERROR timeout reading 5 registers from 3 Serial
08:26:19 ERROR Error retry attempt(0): CRC validation failed.
08:26:21 ERROR Error retry attempt(1): CRC validation failed.
08:26:23 ERROR Error retry attempt(2): CRC validation failed.
08:26:25 ERROR Error retry attempt(3): CRC validation failed.
08:26:26 ERROR timeout reading 2 registers from 16 Rated power
08:26:26 CRITICAL Could not read sensors: ['Serial', 'Rated power']
08:26:26 INFO ############################################################
08:26:26 INFO No response on the Modbus interface tcp://192.168.0.220:8899, see https://kellerza.github.io/sunsynk/guide/fault-finding
08:26:26 INFO ############################################################
08:26:26 CRITICAL This Add-On will terminate in 30 seconds, use the Supervisor Watchdog to restart automatically.
08:26:56 ERROR Task was destroyed but it is pending!
task: <Task pending name='ConnKeeper' coro=<PySolarmanV5Async._conn_keeper() running at /usr/local/lib/python3.11/site-packages/pysolarmanv5/pysolarmanv5_async.py:139> wait_for=>
[08:26:56] INFO: Service restart after closing
08:26:57 INFO Loading configuration: /data/options.json
08:26:57 INFO sunsynk library version: 0.6.4
08:26:57 INFO Schedules:
+-----------+-----+------+--------+-----------+----------+------------+
| Key | src | Read | Report | Change by | Change % | Change any |
+-----------+-----+------+--------+-----------+----------+------------+
| date_time | | 60 | 60 | | | True |
| rw | | 5 | 300 | | | True |
| w | * | 120 | 120 | 50 | | |
| kwh | | 300 | 300 | | | |
| any_unit | | 15 | 300 | | | |
| no_unit | | 15 | 300 | | | True |
+-----------+-----+------+--------+-----------+----------+------------+
08:26:57 INFO Using Single phase sensor definitions.
08:26:57 INFO Added hidden sensors as other sensors depend on it: Rated power, Serial
08:26:57 INFO Connecting to tcp://192.168.0.220:8899
08:26:57 INFO Reading startup sensors Serial, Rated power
08:26:58 ERROR Error retry attempt(0): CRC validation failed.
08:27:00 ERROR Error retry attempt(1): CRC validation failed.
08:27:02 ERROR Error retry attempt(2): CRC validation failed.
08:27:04 ERROR Error retry attempt(3): CRC validation failed.
08:27:06 ERROR Error retry attempt(4): CRC validation failed.
08:27:08 ERROR Error retry attempt(0): CRC validation failed.
08:27:10 ERROR Error retry attempt(1): CRC validation failed.
08:27:12 ERROR Error retry attempt(2): CRC validation failed.
08:27:14 ERROR Error retry attempt(3): CRC validation failed.
08:27:16 ERROR Error retry attempt(4): CRC validation failed.
08:27:18 ERROR OSError reading 5 registers from 3: Failed to read register 3; OSError reading 2 registers from 16: Failed to read register 16

[kellerza]

Not sure this Sofar is supported via the pysolarmanv5 library if I understand this workaround correctly - jmccrohan/pysolarmanv5#18

[Excalibur83]

Hi, thanks for answered.
That's the point. Reading some information, many issues come with Sofar Inverter. It doesn't even works with solarman add-on...
Concerning CRC, and after reading parts of your code, you call data sensor by number from 1 to XXX. Bus address iaw sofar's datasheet , are something like 0x02%%. Do you think this is the reason ?

[kellerza]

0x02 seems like 2 in hex. No idea what they meant with the %%

[kellerza]

Their workaround was to use a cabled solution on the RS232 port (RS485 will likely also work)

So doubt its the registers that is the problem

[Excalibur83]

Hi,
% came from me. Meanings number of your choice.
Addresses start from 0x200 to 0x245 in hex (see attached)
I will try with RS485, but there some issues also.
Whatever be proud of your add-on, Solarman's one doesn't work neither.
You can close that topic if you want. Thanks.
SOFARSOLAR ModBus-RTU Communication Protocol.pdf

[kellerza]

@Excalibur83 did you get RS485 to work?

[Excalibur83]

Hi, not yet, lack of time.