Hello,
I have been desperately trying to install a device via Modbus for quite some time.
Currently, I am using two Modbus devices; one works without any issues. The second device is causing problems when writing to the registers.
More specifically:
In the configuration.yaml, I have added two sensors as an example, which can be read without any issues. This applies to all 30 or so sensors.
modbus:
- name: smartfox
type: tcp
host: 172.16.6.202
port: 502
timeout: 5
delay: 5
sensors:
- name: smartfox.boiler_mode
data_type: uint16
input_type: holding
slave: 1
address: 42206
scan_interval: 100
- name: smartfox.pt1000
unit_of_measurement: °C
data_type: int16
input_type: holding
slave: 1
address: 41038
scan_interval: 100
scale: 0.1
precision: 1
With the following code, I am now trying to use a custom card for writing:
type: custom:button-card
name: Boiler Off
icon: mdi:power
entity: sensor.smartfox_boiler_mode
tap_action:
action: call-service
service: modbus.write_register
service_data:
hub: smartfox
unit: 1
address: 42206
value: 0
state:
- value: '0'
icon: mdi:power
styles:
card:
- background-color: red
icon:
- color: white
Unfortunately, I always receive the following error message:
Logger: homeassistant.components.modbus.modbus
Quelle: components/modbus/modbus.py:331
Integration: Modbus (Dokumentation, Probleme)
Erstmals aufgetreten: 10:43:48 (6 Vorkommnisse)
Zuletzt protokolliert: 13:45:53
Pymodbus: smartfox: Error: device: 1 address: 42206 → Exception Response(144, 16, IllegalFunction)
The following entries are listed in the Modbus manuals of the manufacturer:
After trying everything, I quickly downloaded the Modbus Mechanic tool and tested the writing. With the settings as they appear in the Modbus table, along with an offset of -1, it works immediately without major changes.
Where am I missing something? Is there a specific parameter that ensures it works? I have now used register 42207 -1 offset → 42206 as an example for all write registers.
@brun059 You have quite a bit of experience with Smartfox. Have you managed to write to the registers? - maybe you can help me?