Invalid response received from slave 1, address: 1588, .... (count does not match)

System Health details

System Information

version	core-2025.6.1
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
user	root
virtualenv	false
python_version	3.13.3
os_name	Linux
os_version	6.12.23-haos
arch	aarch64
timezone	Europe/Amsterdam
config_dir	/config

Home Assistant Community Store

GitHub API	ok
GitHub Content	ok
GitHub Web	ok
HACS Data	ok
GitHub API Calls Remaining	5000
Installed Version	2.0.5
Stage	running
Available Repositories	2022
Downloaded Repositories	7

Solcast Solar

can_reach_server	ok

Home Assistant Cloud

logged_in	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 15.2
update_channel	stable
supervisor_version	supervisor-2025.05.5
agent_version	1.7.2
docker_version	28.0.4
disk_total	916.9 GB
disk_used	28.4 GB
healthy	true
supported	true
host_connectivity	true
supervisor_connectivity	true
ntp_synchronized	true
virtualization
board	odroid-m1
supervisor_api	ok
version_api	ok
installed_addons	Advanced SSH & Web Terminal (20.0.2), File editor (5.8.0), UniFi Network Application (4.1.0), WireGuard (0.11.0), AdGuard Home (5.2.10), Samba share (12.5.1), MariaDB (2.7.2), Glances (0.21.1), Mosquitto broker (6.5.1), Music Assistant Server (2.5.4), Squeezelite (0.0.21), phpMyAdmin (0.11.1)

Dashboards

dashboards	4
resources	2
views	12
mode	storage

Network Configuration

adapters	lo (disabled), end0 (enabled, default, auto), docker0 (disabled), hassio (disabled), vethb0b1a13 (disabled), vetha17cbdc (disabled), vethd6e45c9 (disabled), veth9e14190 (disabled), veth0c1141e (disabled), veth8866026 (disabled), veth1640f8c (disabled), veth8ac8b13 (disabled), vethdfee3f2 (disabled), veth7b068c9 (disabled), vethce47b24 (disabled), veth29c88c3 (disabled)
ipv4_addresses	lo (127.0.0.1/8), end0 (192.168.2.222/24), docker0 (172.30.232.1/23), hassio (172.30.32.1/23), vethb0b1a13 (), vetha17cbdc (), vethd6e45c9 (), veth9e14190 (), veth0c1141e (), veth8866026 (), veth1640f8c (), veth8ac8b13 (), vethdfee3f2 (), veth7b068c9 (), vethce47b24 (), veth29c88c3 ()
ipv6_addresses	lo (::1/128), end0 (fe80::65f9:9b71:4ca8:60a3/64), docker0 (fe80::6ce0:11ff:fe75:7090/64), hassio (fe80::c34:abff:feb1:1736/64), vethb0b1a13 (fe80::9cdf:29ff:feba:7463/64), vetha17cbdc (fe80::209c:72ff:fe43:672a/64), vethd6e45c9 (fe80::b4e6:d2ff:fed0:a329/64), veth9e14190 (fe80::90bf:7fff:fe24:198c/64), veth0c1141e (fe80::3041:2cff:feb2:4266/64), veth8866026 (fe80::e05b:1eff:fe2a:6a03/64), veth1640f8c (fe80::dc54:18ff:fe36:b90e/64), veth8ac8b13 (fe80::b0a8:9cff:fe8e:bca9/64), vethdfee3f2 (fe80::543f:82ff:fe0b:295d/64), veth7b068c9 (fe80::3417:eeff:fe79:a496/64), vethce47b24 (fe80::802f:aff:fe9c:e303/64), veth29c88c3 (fe80::7883:cff:fef2:8e94/64)
announce_addresses	192.168.2.222, fe80::65f9:9b71:4ca8:60a3

Recorder

oldest_recorder_run	March 17, 2025 at 14:54
current_recorder_run	June 14, 2025 at 16:38
database_engine	mysql
database_version	10.11.6

Checklist

• I have enabled debug logging for my installation.
• I have filled out the issue template to the best of my ability.
• This issue only contains 1 issue (if you have multiple issues, open one issue for each issue).
• This issue is not a duplicate issue of any previous issues..

Describe the issue

I get this error (and counting)

This error originated from a custom integration.

Logger: custom_components.modbus_local_gateway.tcp_client
Source: custom_components/modbus_local_gateway/tcp_client.py:88
integration: Modbus Local Gateway (documentation, issues)
First occurred: 16:45:45 (46 occurrences)
Last logged: 17:21:50

Invalid response received from slave 1, address: 1588 (count does not match)
Invalid response received from slave 1, address: 2174 (count does not match)
Invalid response received from slave 1, address: 2413 (count does not match)
Invalid response received from slave 1, address: 2727 (count does not match)
Invalid response received from slave 1, address: 237 (count does not match)

Reproduction steps

I have these registers defined like this:

nibe_input_register_1588:
name: Used compressors cooling
address: 1588
size: 1
multiplier: 1
precision: 0
entity_category: diagnostic
entity_registry_enabled_default: True
nibe_input_register_2174:
name: Blocked compressors
address: 2174
size: 2
swap: word
multiplier: 1
precision: 0
entity_category: diagnostic
entity_registry_enabled_default: True
nibe_input_register_2413:
name: EEV Control Mode (EB101)
address: 2413
size: 1
multiplier: 1
precision: 0
entity_category: diagnostic
entity_registry_enabled_default: True
nibe_input_register_2727:
name: Current power
address: 2727
size: 2
swap: word
multiplier: 0.01
unit_of_measurement: "kW"
device_class: power
state_class: measurement
precision: 2
entity_category: diagnostic
entity_registry_enabled_default: True
nibe_holding_register_237:
name: Oper. mode
address: 237
size: 1
control: select
options:
0: “Auto"
1: "Manual"
2: "Additional heat only"
multiplier: 1
entity_category: config
entity_registry_enabled_default: True

As you can see these are quite different from size and number or select.

Debug logs

it is hard to get a small debug log. you will notice that the error message is cut off. this is a part with an example of registers that are not mentioned in the error message:



2025-06-14 16:45:45.007 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_115): 115, count: 1
2025-06-14 16:45:45.007 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 115
2025-06-14 16:45:45.017 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_116): 116, count: 1
2025-06-14 16:45:45.017 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 116
2025-06-14 16:45:45.026 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_134): 134, count: 1
2025-06-14 16:45:45.026 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 134
2025-06-14 16:45:45.036 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_135): 135, count: 1
2025-06-14 16:45:45.037 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 135
2025-06-14 16:45:45.045 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_136): 136, count: 1
2025-06-14 16:45:45.046 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 136
2025-06-14 16:45:45.058 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_141): 141, count: 1
2025-06-14 16:45:45.058 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 141
2025-06-14 16:45:45.066 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_160): 160, count: 1
2025-06-14 16:45:45.067 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 160
2025-06-14 16:45:45.075 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_267): 267, count: 2
2025-06-14 16:45:45.075 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 2 registers/coils from address 267
2025-06-14 16:45:45.085 ERROR (MainThread) [custom_components.modbus_local_gateway.tcp_client] Invalid response received from slave 1, address: 267 (count does not match)
2025-06-14 16:45:45.085 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Error reading nibe_input_register_267
2025-06-14 16:45:45.088 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_279): 279, count: 2
2025-06-14 16:45:45.088 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 2 registers/coils from address 279
2025-06-14 16:45:45.095 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_294): 294, count: 1
2025-06-14 16:45:45.096 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 294
2025-06-14 16:45:45.105 ERROR (MainThread) [custom_components.modbus_local_gateway.tcp_client] Invalid response received from slave 1, address: 294 (count does not match)
2025-06-14 16:45:45.105 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Error reading nibe_input_register_294
2025-06-14 16:45:45.106 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_295): 295, count: 1
2025-06-14 16:45:45.106 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 295
2025-06-14 16:45:45.117 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_296): 296, count: 1
2025-06-14 16:45:45.118 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 296
2025-06-14 16:45:45.125 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_297): 297, count: 1
2025-06-14 16:45:45.125 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 297
2025-06-14 16:45:45.131 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_298): 298, count: 1
2025-06-14 16:45:45.132 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 298
2025-06-14 16:45:45.140 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_299): 299, count: 1
2025-06-14 16:45:45.140 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 299
2025-06-14 16:45:45.148 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_300): 300, count: 1
2025-06-14 16:45:45.149 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 300
2025-06-14 16:45:45.157 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_301): 301, count: 1
2025-06-14 16:45:45.157 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 301
2025-06-14 16:45:45.216 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_303): 303, count: 1
2025-06-14 16:45:45.216 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 303
2025-06-14 16:45:45.224 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_304): 304, count: 1
2025-06-14 16:45:45.224 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 304
2025-06-14 16:45:45.232 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_305): 305, count: 1
2025-06-14 16:45:45.232 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 305
2025-06-14 16:45:45.241 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_306): 306, count: 1
2025-06-14 16:45:45.241 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 306
2025-06-14 16:45:45.249 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_307): 307, count: 1
2025-06-14 16:45:45.249 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 307
2025-06-14 16:45:45.259 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_308): 308, count: 1
2025-06-14 16:45:45.259 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 308
2025-06-14 16:45:45.267 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_309): 309, count: 1
2025-06-14 16:45:45.267 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 309
2025-06-14 16:45:45.277 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_311): 311, count: 1
2025-06-14 16:45:45.277 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 311
2025-06-14 16:45:45.285 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_312): 312, count: 1
2025-06-14 16:45:45.285 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 312
2025-06-14 16:45:45.293 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_313): 313, count: 1
2025-06-14 16:45:45.293 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 313
2025-06-14 16:45:45.301 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_315): 315, count: 1
2025-06-14 16:45:45.301 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 315
2025-06-14 16:45:45.309 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_317): 317, count: 1
2025-06-14 16:45:45.309 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 317
2025-06-14 16:45:45.325 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_321): 321, count: 1
2025-06-14 16:45:45.325 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 321
2025-06-14 16:45:45.333 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_337): 337, count: 1
2025-06-14 16:45:45.333 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 337
2025-06-14 16:45:45.341 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_338): 338, count: 2
2025-06-14 16:45:45.342 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 2 registers/coils from address 338
2025-06-14 16:45:45.349 ERROR (MainThread) [custom_components.modbus_local_gateway.tcp_client] Invalid response received from slave 1, address: 338 (count does not match)
2025-06-14 16:45:45.349 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Error reading nibe_input_register_338
2025-06-14 16:45:45.349 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_358): 358, count: 1
2025-06-14 16:45:45.350 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 358
2025-06-14 16:45:45.359 ERROR (MainThread) [custom_components.modbus_local_gateway.tcp_client] Invalid response received from slave 1, address: 358 (count does not match)
2025-06-14 16:45:45.359 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Error reading nibe_input_register_358
2025-06-14 16:45:45.359 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_359): 359, count: 1
2025-06-14 16:45:45.359 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 359
2025-06-14 16:45:45.367 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_374): 374, count: 1
2025-06-14 16:45:45.367 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 374
2025-06-14 16:45:45.375 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_385): 385, count: 1
2025-06-14 16:45:45.375 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 385
2025-06-14 16:45:45.387 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_386): 386, count: 1
2025-06-14 16:45:45.388 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 386
2025-06-14 16:45:45.393 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_387): 387, count: 1
2025-06-14 16:45:45.393 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 387
2025-06-14 16:45:45.400 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_388): 388, count: 1
2025-06-14 16:45:45.400 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 388
2025-06-14 16:45:45.408 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_389): 389, count: 1
2025-06-14 16:45:45.408 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 389
2025-06-14 16:45:45.416 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_390): 390, count: 1
2025-06-14 16:45:45.416 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 390
2025-06-14 16:45:45.424 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_391): 391, count: 1
2025-06-14 16:45:45.425 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 391
2025-06-14 16:45:45.433 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_392): 392, count: 1
2025-06-14 16:45:45.433 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 392
2025-06-14 16:45:45.441 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_400): 400, count: 1
2025-06-14 16:45:45.442 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 400
2025-06-14 16:45:45.449 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_401): 401, count: 1
2025-06-14 16:45:45.450 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 401
2025-06-14 16:45:45.457 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_402): 402, count: 1
2025-06-14 16:45:45.457 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 402
2025-06-14 16:45:45.472 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_403): 403, count: 1
2025-06-14 16:45:45.473 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 403
2025-06-14 16:45:45.485 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_404): 404, count: 1
2025-06-14 16:45:45.485 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 404
2025-06-14 16:45:45.494 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_405): 405, count: 1
2025-06-14 16:45:45.494 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 405
2025-06-14 16:45:45.502 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_406): 406, count: 1
2025-06-14 16:45:45.503 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 406
2025-06-14 16:45:45.513 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_407): 407, count: 1
2025-06-14 16:45:45.513 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 407
2025-06-14 16:45:45.532 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_408): 408, count: 1
2025-06-14 16:45:45.532 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 408
2025-06-14 16:45:45.546 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_409): 409, count: 1
2025-06-14 16:45:45.546 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 409
2025-06-14 16:45:45.555 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_410): 410, count: 1
2025-06-14 16:45:45.555 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 410
2025-06-14 16:45:45.572 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_411): 411, count: 1
2025-06-14 16:45:45.573 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 411
2025-06-14 16:45:45.586 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_412): 412, count: 1
2025-06-14 16:45:45.586 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 412
2025-06-14 16:45:45.593 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_413): 413, count: 1
2025-06-14 16:45:45.593 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 413
2025-06-14 16:45:45.601 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_414): 414, count: 1
2025-06-14 16:45:45.602 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 414
2025-06-14 16:45:45.627 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_415): 415, count: 1
2025-06-14 16:45:45.627 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 415
2025-06-14 16:45:45.637 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_416): 416, count: 1
2025-06-14 16:45:45.637 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 416
2025-06-14 16:45:45.647 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_417): 417, count: 1
2025-06-14 16:45:45.648 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 417
2025-06-14 16:45:45.678 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_418): 418, count: 1
2025-06-14 16:45:45.678 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 418
2025-06-14 16:45:45.690 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_419): 419, count: 1
2025-06-14 16:45:45.690 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 419
2025-06-14 16:45:45.722 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_420): 420, count: 1
2025-06-14 16:45:45.722 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 420
2025-06-14 16:45:45.743 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_421): 421, count: 1
2025-06-14 16:45:45.743 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 421
2025-06-14 16:45:45.754 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_422): 422, count: 1
2025-06-14 16:45:45.754 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 422
2025-06-14 16:45:45.775 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_423): 423, count: 1
2025-06-14 16:45:45.775 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 423
2025-06-14 16:45:45.793 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_424): 424, count: 1
2025-06-14 16:45:45.793 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 424
2025-06-14 16:45:45.804 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_550): 550, count: 1
2025-06-14 16:45:45.804 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 550
2025-06-14 16:45:45.814 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_551): 551, count: 1
2025-06-14 16:45:45.815 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 551
2025-06-14 16:45:45.829 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_552): 552, count: 1
2025-06-14 16:45:45.829 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 552
2025-06-14 16:45:45.840 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_553): 553, count: 1
2025-06-14 16:45:45.840 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 553
2025-06-14 16:45:45.849 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_554): 554, count: 1
2025-06-14 16:45:45.849 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 554
2025-06-14 16:45:45.864 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_555): 555, count: 1
2025-06-14 16:45:45.864 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 555
2025-06-14 16:45:45.872 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_556): 556, count: 1
2025-06-14 16:45:45.873 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 556
2025-06-14 16:45:45.881 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_557): 557, count: 1
2025-06-14 16:45:45.881 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 557
2025-06-14 16:45:45.894 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_579): 579, count: 1
2025-06-14 16:45:45.895 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 579
2025-06-14 16:45:45.904 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_581): 581, count: 1
2025-06-14 16:45:45.904 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 581
2025-06-14 16:45:45.914 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_582): 582, count: 1
2025-06-14 16:45:45.914 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 582
2025-06-14 16:45:45.925 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_590): 590, count: 1
2025-06-14 16:45:45.925 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 590
2025-06-14 16:45:45.934 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_591): 591, count: 1
2025-06-14 16:45:45.935 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 591
2025-06-14 16:45:45.945 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_592): 592, count: 1
2025-06-14 16:45:45.945 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 592
2025-06-14 16:45:45.956 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_593): 593, count: 1
2025-06-14 16:45:45.956 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 593
2025-06-14 16:45:45.966 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_683): 683, count: 1
2025-06-14 16:45:45.966 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 683
2025-06-14 16:45:45.980 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_684): 684, count: 1
2025-06-14 16:45:45.980 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 684
2025-06-14 16:45:45.995 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Reading slave: 1, register/coil (nibe_input_register_685): 685, count: 1
2025-06-14 16:45:45.996 DEBUG (MainThread) [custom_components.modbus_local_gateway.tcp_client] Trying to read 1 registers/coils from address 685

Diagnostics dump

No response

While scrolling through today’s list of sensor values I noticed that sensor.nibe_compressor_size_eb101 occasionally changes from 12 to 17. That would mean that my heat pump suddenly increased from its 12 kW to 17 kW. That would be magic 😊. But it has probably something to do with the interpretation of the values coming back from the system. The current read amount of registers is the default 8.

[timlaing]

@Doorshifter - I'll take a look at this later this week

I did some more investigating.

This Nibe document states their S-series systems, like the one I use, can handle a maximum of 100 registers per second and 20 registers per query.

It also shows a list of (not all very current) register defs, but suitable for testing. You will notice: registers are not same size and not consecutive. This is probably why the current register grouping makes mistakes and I get random flip-flopping graphs.

Taking this a step further I came up with this workflow in an attempt to resolve this facet (but it isn't perfect yet and certainly not tested extensively).

Starting points:

Simplified Startup: No complex config trail and error
Specific Adaptation: Learns device quirks
Self-Healing: Recovers from config errors
Plug-and-Play: Zero configuration needed

The adaptive system essentially "discovers" the optimal grouping matrix through runtime experience rather than predicting it upfront. This is particularly interesting for devices where register behavior can vary by model and firmware. Which I have seen happing for Nibe at least.

Grouping Logic

Initial grouping by scan_interval and address proximity
Respects Nibe's (or any other brand) 20-register limit
Handles variable register sizes

In overview:

• Adaptive Engine Handles Optimization
• Merges groups with similar poll timing
• Splits groups causing errors
• Adjusts scan intervals dynamically (repeating the 100 registers/sec)

Below some code amendments/idea's that might (haven't tested)...

• Automatically splits groups causing "count mismatch" errors
• Merges groups when stable
• Adjusts polling intervals based on load
• Nibe-Compatible (but could be any other device brand of course):
• Strict 20-register limit (which could also be a config item)
• Proper handling of Nibe-specific swapping
• Respects 100 registers/second limit (which could also be a config item)
• Zero Configuration:
• No need for manual grouping parameters
• Automatically adapts to your register map
• Efficient:
• Minimizes requests while respecting device limits
• Groups by temporal proximity to reduce redundant reads

init.py

import asyncio
import logging
import time
import struct
from datetime import timedelta
from homeassistant.core import HomeAssistant
from homeassistant.helpers.update_coordinator import DataUpdateCoordinator

_LOGGER = logging.getLogger(name)

class ModbusEntity:
def init(self, config):
self.name = config["name"]
self.address = config["address"]
self.size = config.get("size", 1)
self.signed = config.get("signed", False)
self.swap = config.get("swap", None)
self.control = config.get("control", "sensor")
self.scan_interval = config.get("scan_interval", 30)
self.multiplier = config.get("multiplier", 1.0)
self.precision = config.get("precision", None)
self.unit = config.get("unit_of_measurement")
self.device_class = config.get("device_class")
self.state_class = config.get("state_class")
self.entity_category = config.get("entity_category")
self.min = config.get("min")
self.max = config.get("max")

def value_to_registers(self, value):
    """Convert a value to raw registers for writing"""
    # Apply reverse multiplier
    raw_value = value / self.multiplier
    
    # Handle precision
    if self.precision == 0:
        raw_value = int(raw_value)
    
    # Convert to bytes
    if self.size == 1:
        if self.signed:
            data = struct.pack('>h', int(raw_value))
        else:
            data = struct.pack('>H', int(raw_value))
    elif self.size == 2:
        if self.signed:
            data = struct.pack('>i', int(raw_value))
        else:
            data = struct.pack('>I', int(raw_value))
    else:
        _LOGGER.error("Unsupported size for writing")
        return []
    
    # Split into registers
    registers = []
    for i in range(0, len(data), 2):
        registers.append(int.from_bytes(data[i:i+2], 'big'))
    
    # Apply swapping for writing
    if self.swap == "word" and self.size > 1:
        registers = list(reversed(registers))
    elif self.swap == "byte":
        registers = [(reg >> 8) | ((reg & 0xFF) << 8) for reg in registers]
    
    return registers

class GroupManager:
def init(self, max_registers=20):
self.max_registers = max_registers
self.groups = []
self.group_health = {}

def initial_grouping(self, entities):
    """Simple temporal + spatial initial grouping"""
    # Filter out write-only entities
    readable_entities = [e for e in entities if e.control != "write_only"]
    
    # Sort by scan interval and address
    readable_entities.sort(key=lambda x: (x.scan_interval, x.address))
    
    groups = []
    current_group = []
    current_end = -1
    current_interval = None
    
    for entity in readable_entities:
        # Calculate required space
        entity_end = entity.address + entity.size - 1
        space_needed = entity.size
        
        # Calculate gap if not first entity
        if current_group:
            gap = entity.address - current_end - 1
            space_needed += max(0, gap)
        
        # Check available space
        if current_group:
            start_addr = min(e.address for e in current_group)
            current_span = current_end - start_addr + 1
            space_available = self.max_registers - current_span
        else:
            space_available = self.max_registers
        
        # Temporal compatibility
        interval_ok = (
            not current_interval or 
            abs(entity.scan_interval - current_interval) <= 0.5 * min(entity.scan_interval, current_interval)
        )
        
        if current_group and interval_ok and space_needed <= space_available:
            current_group.append(entity)
            current_end = max(current_end, entity_end)
        else:
            if current_group:
                groups.append(current_group)
            current_group = [entity]
            current_end = entity_end
            current_interval = entity.scan_interval
    
    if current_group:
        groups.append(current_group)
    
    # Create group objects
    self.groups = []
    for i, group_entities in enumerate(groups):
        group_id = f"group_{i}"
        self.groups.append({
            'id': group_id,
            'entities': group_entities,
            'last_read': 0,
            'current_interval': min(e.scan_interval for e in group_entities),
            'base_interval': min(e.scan_interval for e in group_entities),
            'error_count': 0
        })
        self.group_health[group_id] = {'errors': 0, 'successes': 0}
    
    return self.groups

def get_groups_to_poll(self):
    now = time.time()
    return [g for g in self.groups if now - g['last_read'] >= g['current_interval']]

def handle_success(self, group_id, register_count, exec_time):
    """Update group state after successful read"""
    group = next(g for g in self.groups if g['id'] == group_id)
    group['last_read'] = time.time()
    group['error_count'] = 0
    
    # Update health stats
    health = self.group_health[group_id]
    health['successes'] += 1
    
    # Calculate efficiency
    efficiency = register_count / max(0.01, exec_time)
    if efficiency > 80:  # More than 80 registers/second throughput
        # Speed up by 10% but don't exceed base interval
        new_interval = max(
            group['base_interval'],
            group['current_interval'] * 0.9
        )
        group['current_interval'] = new_interval

def handle_error(self, group_id, error_type):
    """Handle read error and determine recovery action"""
    group = next(g for g in self.groups if g['id'] == group_id)
    group['error_count'] += 1
    
    # Update health stats
    health = self.group_health[group_id]
    health['errors'] += 1
    
    if "count mismatch" in error_type:
        return self.split_group(group_id)
    elif "timeout" in error_type or "overload" in error_type:
        # Slow down by 50%
        group['current_interval'] = min(300, group['current_interval'] * 1.5)
        return "SLOW_DOWN"
    return "RETRY"

def split_group(self, group_id):
    """Split a group into smaller subgroups"""
    group = next(g for g in self.groups if g['id'] == group_id)
    entities = group['entities']
    
    # Can't split groups with 1 entity
    if len(entities) <= 1:
        group['current_interval'] *= 1.5  # Just slow down
        return "SLOW_DOWN"
    
    # Sort by address and split
    entities.sort(key=lambda x: x.address)
    mid = len(entities) // 2
    subgroups = [entities[:mid], entities[mid:]]
    
    # Remove original group
    self.groups = [g for g in self.groups if g['id'] != group_id]
    del self.group_health[group_id]
    
    # Add new groups
    for i, subgroup in enumerate(subgroups):
        new_id = f"{group_id}_split{i}"
        self.groups.append({
            'id': new_id,
            'entities': subgroup,
            'last_read': time.time(),
            'current_interval': group['current_interval'] * 1.2,
            'base_interval': min(e.scan_interval for e in subgroup),
            'error_count': 0
        })
        self.group_health[new_id] = {'errors': 0, 'successes': 0}
    
    return "SPLIT_GROUP"

def optimize_groups(self):
    """Periodically merge compatible groups"""
    # Sort groups by current interval and min address
    sorted_groups = sorted(self.groups, key=lambda g: (
        g['current_interval'], 
        min(e.address for e in g['entities'])
    ))
    
    merged_groups = []
    i = 0
    while i < len(sorted_groups) - 1:
        g1 = sorted_groups[i]
        g2 = sorted_groups[i+1]
        
        # Check compatibility
        interval_ratio = max(g1['current_interval'], g2['current_interval']) / min(g1['current_interval'], g2['current_interval'])
        g1_end = max(e.address + e.size for e in g1['entities'])
        g2_start = min(e.address for e in g2['entities'])
        gap = g2_start - g1_end
        
        total_size = (
            g1_end - min(e.address for e in g1['entities']) + 
            max(e.address + e.size for e in g2['entities']) - g2_start
        )
        
        if (interval_ratio < 1.2 and  # <20% interval difference
            gap <= 10 and  # Small address gap
            total_size <= self.max_registers):
            
            # Merge groups
            merged_id = f"merged_{g1['id']}_{g2['id']}"
            merged_group = {
                'id': merged_id,
                'entities': g1['entities'] + g2['entities'],
                'current_interval': min(g1['current_interval'], g2['current_interval']),
                'base_interval': min(g1['base_interval'], g2['base_interval']),
                'last_read': time.time(),
                'error_count': 0
            }
            merged_groups.append(merged_group)
            
            # Update health
            self.group_health[merged_id] = {
                'errors': self.group_health[g1['id']]['errors'] + self.group_health[g2['id']]['errors'],
                'successes': self.group_health[g1['id']]['successes'] + self.group_health[g2['id']]['successes']
            }
            del self.group_health[g1['id']]
            del self.group_health[g2['id']]
            
            i += 2  # Skip next group
        else:
            i += 1
    
    # Update groups list if we merged anything
    if merged_groups:
        self.groups = [g for g in sorted_groups if g['id'] not in [g1['id'], g2['id']]] + merged_groups

def convert_value(registers, entity):
"""Convert raw registers to value with Nibe-specific handling"""
# Convert registers to byte string
byte_string = b''.join(reg.to_bytes(2, 'big') for reg in registers)

# Apply swapping if needed
if entity.swap == "word" and entity.size > 1:
    # Word swapping: reverse order of 16-bit words
    words = [byte_string[i:i+2] for i in range(0, len(byte_string), 2)]
    swapped_bytes = b''.join(reversed(words))
elif entity.swap == "byte":
    # Byte swapping within words
    swapped_bytes = b''
    for i in range(0, len(byte_string), 2):
        swapped_bytes += bytes([byte_string[i+1], byte_string[i]])
else:
    swapped_bytes = byte_string

# Determine value based on size and signed
value = 0
if entity.size == 1:
    if entity.signed:
        value = struct.unpack('>h', swapped_bytes[:2])[0]
    else:
        value = struct.unpack('>H', swapped_bytes[:2])[0]
elif entity.size == 2:
    if entity.signed:
        value = struct.unpack('>i', swapped_bytes)[0]
    else:
        value = struct.unpack('>I', swapped_bytes)[0]
elif entity.size == 4:
    # Special handling for Nibe 64-bit values
    if len(swapped_bytes) == 8:
        value = struct.unpack('>d', swapped_bytes)[0]
    else:
        _LOGGER.warning("Invalid size for 64-bit value")
        value = 0
else:
    value = registers[0]  # Fallback to first register

# Apply multiplier and precision
value *= entity.multiplier
if entity.precision is not None:
    value = round(value, entity.precision)

return value

class ModbusCoordinator(DataUpdateCoordinator):
def init(self, hass, tcp_client, group_manager):
super().init(
hass,
_LOGGER,
name="modbus_local_gateway",
update_interval=timedelta(seconds=1), # We control timing per group
)
self.tcp_client = tcp_client
self.group_manager = group_manager

async def _async_update_data(self):
    """Update all sensor groups"""
    groups_to_poll = self.group_manager.get_groups_to_poll()
    results = {}
    
    for group in groups_to_poll:
        # Calculate read range
        min_addr = min(e.address for e in group['entities'])
        max_addr = max(e.address + e.size for e in group['entities'])
        count = max_addr - min_addr
        
        try:
            start_time = time.time()
            response = await self.tcp_client.read_registers(
                slave=1,
                address=min_addr,
                count=count
            )
            exec_time = time.time() - start_time
            
            # Process response for each entity
            for entity in group['entities']:
                start_idx = entity.address - min_addr
                end_idx = start_idx + entity.size
                entity_data = response.registers[start_idx:end_idx]
                
                # Convert to proper value
                value = convert_value(entity_data, entity)
                results[entity.name] = value
            
            # Update group state
            self.group_manager.handle_success(group['id'], count, exec_time)
        except Exception as e:
            error_type = str(e)
            action = self.group_manager.handle_error(group['id'], error_type)
            _LOGGER.warning(
                "Group %s error: %s. Action: %s",
                group['id'], error_type, action
            )
    
    return results

async def async_optimize_periodically(self):
    """Run optimization every 5 minutes"""
    while True:
        await asyncio.sleep(300)  # 5 minutes
        self.group_manager.optimize_groups()

async def async_setup_entry(hass: HomeAssistant, entry, async_add_entities):
"""Set up the Modbus Local Gateway."""
config = entry.data
host = config["tcp_host"]
port = config["tcp_port"]
entities_config = config.get("sensors", [])

# Create entities
entities = [ModbusEntity(ec) for ec in entities_config]

# Create TCP client
tcp_client = ModbusTcpClient(host, port)
await tcp_client.connect()

# Create group manager
group_manager = GroupManager(max_registers=20)  # Nibe limit
group_manager.initial_grouping(entities)

# Create coordinator
coordinator = ModbusCoordinator(hass, tcp_client, group_manager)
await coordinator.async_config_entry_first_refresh()

# Create HA entities
async_add_entities([
    ModbusSensor(entity, coordinator) 
    for entity in entities 
    if entity.control in ["sensor", "number"]
])

# Register write service
async def write_register(call):
    entity_id = call.data["entity_id"]
    value = call.data["value"]
    entity = next(e for e in entities if e.name == entity_id)
    registers = entity.value_to_registers(value)
    await tcp_client.write_registers(1, entity.address, registers)

hass.services.async_register(DOMAIN, "write_register", write_register)

# Start optimizer
hass.async_create_task(coordinator.async_optimize_periodically())

return True

tcp_client.py

import asyncio
import logging
from pymodbus.client import AsyncModbusTcpClient

_LOGGER = logging.getLogger(name)

class ModbusTcpClient:
def init(self, host, port):
self.host = host
self.port = port
self.client = None

async def connect(self):
    self.client = AsyncModbusTcpClient(self.host, self.port)
    await self.client.connect()
    _LOGGER.info("Connected to %s:%s", self.host, self.port)
    
async def read_registers(self, slave, address, count):
    response = await self.client.read_holding_registers(address, count, slave=slave)
    if response.isError():
        raise Exception(f"Modbus error: {response}")
    return response
    
async def write_registers(self, slave, address, values):
    response = await self.client.write_registers(address, values, slave=slave)
    if response.isError():
        raise Exception(f"Write error: {response}")
    return response

I won't be able to test this for the coming days due to travel, but I am very interested in your view on this.

I tried to continue with this and it seems more complex than I thought it would be 😄

[timlaing]

Thank you for your input. When I get a few minutes this weekend I’ll see what I can do for you.

😊Gr. MOn 21 Jun 2025, at 18:29, Tim Laing ***@***.***> wrote:timlaing left a comment (timlaing/modbus_local_gateway#79) Thank you for your input. When I get a few minutes this weekend I’ll see what I can do for you. —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>