Unable to read modbus registers after updating to version >= 1.0

[PostICT]

Issue related to

modbus over tcp Home Assistant Add-On

Describe the issue/bug

A clear and concise description of what the bug is.

Expected behavior A clear and concise description of what you expected to happen.

V5_SEQ_NO_MISMATCH and V5_MISMATCH:
Resulting in:
12:26:01] INFO ############################################################
[12:26:01] INFO No response on the Modbus interface solarman-tcp://192.ip.ip.69:8899: TimeoutError, see https://kellerza.github.io/sunsynk/guide/fault-finding
[12:26:01] INFO ############################################################

factory reset of the Eth Dongle is not solving the issue.

Your environment

• Home Assistant version: 2026.8.x
• Addon:
  • Name: sunsynk-multi
  • Version: > 1.0.0
• Inverter:
  • Make: Deye
  • Model: 6k-SG04LP3-EU
  • Firmware: MAIN 2005-1151-1807 HMI: 1001-C04D
• Adaptor details: Deye Eth dongle

Your configuration

Paste your add-on YAML between the two lines below (replace the placeholder line). Keep the
first line (three backticks and yaml) and the last line (three backticks only) so GitHub formats
it as a code block.

INVERTERS:
  - SERIAL_NR: '2validSerial8'
    HA_PREFIX: SS-dev
    MODBUS_ID: 1
    DONGLE_SERIAL_NUMBER: '2valid serial8'
    PORT: solarman-tcp://192.validIP.69:8899
SENSOR_DEFINITIONS: three-phase
SENSORS:
  - energy_management
  - power_flow_card
  - pv2_power
SENSORS_FIRST_INVERTER:
  - settings
MANUFACTURER: Deye
READ_ALLOW_GAP: 2
READ_SENSORS_BATCH_SIZE: 20
READ_MESSAGE_SPACING: 0.05
READ_ATTEMPTS: 5
TIMEOUT: 10
STALE_INVERTER_AFTER_SECONDS: 120
STALE_INVERTER_SKIP_SECONDS: 600
SCHEDULES:
  - KEY: W
    READ_EVERY: 5
    REPORT_EVERY: 60
    CHANGE_ANY: false
    CHANGE_BY: 80
    CHANGE_PERCENT: 0
NUMBER_ENTITY_MODE: auto
PROG_TIME_INTERVAL: '15'
DEBUG: 1
MQTT_HOST: core-mosquitto
MQTT_PORT: 1883
MQTT_USERNAME: hass
MQTT_PASSWORD: valid_passw

Logs

Same idea for logs: paste between the fences (replace the placeholder). Use the most recent lines
that show the error.

12:25:57] INFO: Starting the Sunsynk add-on
[12:25:58] INFO    Loading config: /data/options.json
[12:25:58] INFO    sunsynk library - commit 246721b - last stable version 1.2.0
[12:25:58] DEBUG   Sunsynk: Sunsynk(unit=SolarmanUnit(port='solarman-tcp://192.ip.ip.69:8899', dongle_serial_number=serialmasked, server_id=1, timeout=3), state=InverterState(values={}, registers={}, onchange=None, history=defaultdict(<class 'list'>, {}), historynn=defaultdict(<class 'list'>, {})), port='solarman-tcp://192.ip.ip.69:8899', baudrate=9600, timeout=3, read_attempts=3, read_sensors_batch_size=20, allow_gap=2, timeouts=0) - inv:InverterOptions(port='solarman-tcp://192.1ip.ip.69:8899', driver='', modbus_id=1, ha_prefix='ss_dev', serial_nr='masked', dongle_serial_number=masked)
[12:25:58] INFO    Schedules:
+-----------+-----+------+--------+-----------+----------+------------+
|    Key    | src | Read | Report | Change by | Change % | Change any |
+-----------+-----+------+--------+-----------+----------+------------+
| date_time |     |  60  |   60   |           |          |    True    |
|     rw    |     |  5   |  300   |           |          |    True    |
|    enum   |     |  5   |  300   |           |          |    True    |
|     w     |  *  |  5   |   60   |    80.0   |          |            |
|    kwh    |     | 300  |  300   |           |          |            |
|  any_unit |     |  15  |  300   |           |          |            |
|  no_unit  |     |  15  |  300   |           |          |    True    |
+-----------+-----+------+--------+-----------+----------+------------+
[12:25:58] INFO    Importing sensor definitions three-phase (view the source online: https://github.com/kellerza/sunsynk/tree/main/src/sunsynk/definitions/three_phase_lv.py )
[12:25:58] DEBUG   Schedule w used for Rated power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for PV2 power (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Total Battery Charge (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Total Battery Discharge (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Total Grid Export (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Total Grid Import (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Total PV Energy (reason: Unit)
[12:25:58] DEBUG   Schedule w used for AUX power (reason: Unit)
[12:25:58] DEBUG   Schedule any_unit used for Battery current (reason: Any unit)
[12:25:58] DEBUG   Schedule w used for Battery power (reason: Unit)
[12:25:58] DEBUG   Schedule any_unit used for Battery SOC (reason: Any unit)
[12:25:58] DEBUG   Schedule any_unit used for Battery voltage (reason: Any unit)
[12:25:58] DEBUG   Schedule kwh used for Day Battery Charge (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Day Battery discharge (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Day Grid Export (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Day Grid Import (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Day Load Energy (reason: Unit)
[12:25:58] DEBUG   Schedule kwh used for Day PV Energy (reason: Unit)
[12:25:58] DEBUG   Schedule no_unit used for Grid Connected (reason: No unit)
[12:25:58] DEBUG   Schedule w used for Grid CT power (reason: Unit)
[12:25:58] DEBUG   Schedule any_unit used for Grid frequency (reason: Any unit)
[12:25:58] DEBUG   Schedule w used for Grid L1 power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for Grid L2 power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for Grid L3 power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for Grid power (reason: Unit)
[12:25:58] DEBUG   Schedule any_unit used for Grid current (reason: Any unit)
[12:25:58] DEBUG   Schedule w used for Inverter power (reason: Unit)
[12:25:58] DEBUG   Schedule any_unit used for Load frequency (reason: Any unit)
[12:25:58] DEBUG   Schedule w used for Load power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for Load L1 power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for Load L2 power (reason: Unit)
[12:25:58] DEBUG   Schedule w used for Load L3 power (reason: Unit)
[12:25:58] DEBUG   Schedule any_unit used for Load L1 voltage (reason: Any unit)
[12:25:58] DEBUG   Schedule any_unit used for Load L2 voltage (reason: Any unit)
[12:25:58] DEBUG   Schedule any_unit used for Load L3 voltage (reason: Any unit)
[12:25:58] DEBUG   Schedule no_unit used for Overall state (reason: No unit)
[12:25:58] DEBUG   Schedule rw used for Priority Load (reason: RWSensor)
[12:25:58] DEBUG   Schedule w used for PV power (reason: Unit)
[12:25:58] DEBUG   Schedule rw used for Use Timer (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Export Limit power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Grid Charge enabled (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Load Limit (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog1 Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog1 charge (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog1 power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog1 Time (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog2 Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog2 charge (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog2 power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog2 Time (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog3 Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog3 charge (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog3 power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog3 Time (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog4 Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog4 charge (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog4 power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog4 Time (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog5 Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog5 charge (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog5 power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog5 Time (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog6 Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog6 charge (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog6 power (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Prog6 Time (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Solar Export (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Battery Low Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Battery Restart Capacity (reason: RWSensor)
[12:25:58] DEBUG   Schedule rw used for Battery Shutdown Capacity (reason: RWSensor)
[12:25:58] INFO    Added hidden sensors as other sensors depend on it: Rated power, Battery Low Capacity, Battery Restart Capacity, Battery Shutdown Capacity
[12:25:58] INFO    Connecting to solarman-tcp://192.ip.ip.69:8899
[12:25:58] DEBUG   <asyncio.TransportSocket fd=6, family=2, type=1, proto=6, laddr=('172.ip.ip.5', 55858), raddr=('192.ip.ip.69', 8899)> connected to 192.ip.ip.69:8899: (<_SelectorSocketTransport fd=6 read=polling write=<idle, bufsize=0>>, <asyncio.streams.StreamReaderProtocol object at 0x7f2c0ca596a0>)
[12:25:58] INFO    Reading inverter identity (registers 0-7)
[12:25:58] DEBUG   [2106314218] SENT: a5 17 00 10 45 24 00 ea cd 8b 7d 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 03 00 00 00 08 44 0c ad 15
[12:25:59] DEBUG   [2106314218] V5_SEQ_NO_MISMATCH: a5 17 00 10 45 03 00 ea 02
[12:26:01] DEBUG   [2106314218] V5_MISMATCH: 7a ea 00 00 00 f9 01 03 f6 04 c4 14 ab 00 2f 00 00 ff bb ff 62 02 62 00 00 00 00 00 00 00 00 00 07 09 1e 09 2e 08 f5 00 00 00 00 00 00 00 7c ff 32 ff f4 ff a2 00 00 13 8c 00 45 00 98 00 26 00 86 00 85 00 2b 00 03 00 02 00 00 00 05 00 00 00 00 00 03 00 02 00 00 00 05 00 00 09 26 09 32 09 05 ff c4 00 fa 00 00 ff 91 02 70 00 1e 02 1f 02 1f 13 8c 00 00 00 0d 01 a2 00 12 01 c1 09 1f 09 2b 08 fe 00 00 00 00 00 00 ff 94 02 72 00 1e 02 24 02 24 13 8c ff ff 00 00 00 00 00 00 00 00 01 1d 01 21 00 9a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 95 01 90 00 00 00 00 09 4d 00 11 09 45 00 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff ff ff 00 00 00 00 00 00 00 00 00 00
[12:26:01] INFO    ############################################################
[12:26:01] INFO    No response on the Modbus interface solarman-tcp://192.ip.ip.69:8899: TimeoutError, see https://kellerza.github.io/sunsynk/guide/fault-finding
[12:26:01] INFO    ############################################################
[12:26:01] CRITICAL This Add-On will terminate in 30 seconds, use the Supervisor Watchdog to restart automatically.
[12:26:01] DEBUG   Close <_UnixSelectorEventLoop running=False closed=False debug=True>
[10:26:01] WARNING: Addon resource not ready 2

[kellerza]

The only difference with solarman is that there are no retries on startup. The driver is exactly the same.

This is being worked on in #687