Toscanaccio
January 3, 2025, 1:57pm
1
Hi,
I have a solar system consisting of an off-grid hybrid subsystem (MUST Pro 5Kw-220V) and an on-grid microinverter subsystem (Deye SUN-M220G4-EU-Q0). I intend to use a bidirectional energy meter to check the balance between the active energy supplied and the active energy injected. For this I have been testing the Eastron SDM230M meter successfully, except for one particular issue, which despite research, I have not been able to resolve. This refers to changing the holding register 463776 (modbus 0xF920) from the default mode 2 (total = import + export) to mode 3 (total = import - export). To do this, I need to write this holding register with two bytes (0x0003) and I don’t know how to do it, the ESPHome documentation on this is confusing to me, so I am asking the community for help. Thanks!
Karosm
January 3, 2025, 3:20pm
2
You could use modbus custom command:custom_command: [ 0x1, 0x10, 0xF920, 0x03]
number:
- platform: modbus_controller
modbus_controller_id: modbus_device
name: "Mode"
id: total_mode
register_type: holding
address: 0xF920
value_type: U_WORD
min_value: 2
max_value: 3
Toscanaccio
January 5, 2025, 3:32pm
3
I tried both proposed methods, but neither worked:
custom_command: [ 0x1, 0x10, 0xF9, 0x20, 0x03]
and
number:
platform: modbus_controller
I also tried:
custom_command: [ 0x1, 0x06, 0xF9, 0x20, 0x03]
without success. I checked with Open ModScan which confirmed the mode remained as 2.
Karosm
January 5, 2025, 3:52pm
4
Toscanaccio:
also tried:
custom_command: [ 0x1, 0x06, 0xF9, 0x20, 0x03]
Sorry for that, 0x06 is correct fc for single register.
So what are getting on runtime log ?
Toscanaccio
January 5, 2025, 9:19pm
5
I run this yaml:
esphome:
api:
ota:
platform: esphome
wifi:
time:
platform: homeassistant
logger:
uart:
id: uart_sdm
modbus:
id: mod_bus_sdm230
modbus_controller:
id: mod_cont_sdm230
number:
sensor:
platform: modbus_controller
In number: I set the value and in sensor: I read the value. When I set 3, the value read remains 2 and after a few seconds the value in number: automatically returns to 2.
[17:43:10][W][component:237]: Component modbus_controller took a long time for an operation (73 ms).
