How to send meter readings from homeassistant to cFos Wallbox? #89

Activity

1. dylan09 commented on Jun 29, 2025

   

   dylan09

   on Jun 29, 2025

   Last edited by dylan09

   More actions

   I am sending my meter values via HTTP POST request using Node-Red. Should also be possible directly from HA.

   http://CFOS-IP/cnf?cmd=set_ajax_meter&dev_id=M4
   

   Take a look at the cFos documentation.

   As I integrated my wallbox in HA Modbus integration inside cfos Wallbox wasn't working well. So I am stuck with HTTP requests.
2. 98jan commented on Oct 18, 2025

   

   98jan

   on Oct 18, 2025

   More actions

   Hi @wmader23,

   I am already using the REST endpoints of the cfos wallbox, which you could also reuse. This calls every 15 seconds (is the same interval as for modbus) the endpoint of the cfos wallbox and updates the meter values.

   # Configure RESTful Command
   rest_command:
     send_wallbox_meter_data:
       # dev_id can differ
       url: http://<ip>/cnf?cmd=set_ajax_meter&dev_id=M4
       method: post
       username: <username>
       password: <password>>
       content_type: application/json
       # don't verify ssl as it's selfsigned
       verify_ssl: false
       # right now I am calculating the export/import of energy and sending to the wallbox, can also be splitted in different calls. You could just adapt this script.
       payload: '{ "power_w": {% if states("sensor.solax_grid_import") | float(default=0.0) - states("sensor.solax_battery_power_charge") | float(default=0.0) > 0 %} {{ states("sensor.solax_grid_import") | float(default=0.0) - states("sensor.solax_battery_power_charge") | float(default=0.0) }} {% else %} {{ states("sensor.solax_grid_export") | float(default=0.0) | multiply(-1) }} {% endif %} }'
       # '{ "power_w": {{ states("sensor.solax_grid_export") | float(default=0.0) | multiply(-1) }} }'
       #payload: '{ "export_wh": {{ states("sensor.solax_grid_export") }}, "current": [{{ states("sensor.solax_inverter_current_l1") | float(default=0.0) | multiply(1000)}}, {{ states("sensor.solax_inverter_current_l2") | float(default=0.0) | multiply(1000)}}, {{states("sensor.solax_inverter_current_l3") | float(default=0.0) | multiply(1000)}}]}'
   
   automation:
     - alias: "Send Data to Wallbox"
       trigger:
         platform: time_pattern
         seconds: "/15"
       action:
         service: rest_command.send_wallbox_meter_data
   ```
3. wmader23 commented on Dec 17, 2025

   

   wmader23

   on Dec 17, 2025

   Author

   More actions

   Hei, thank your for the code snipped!
4. Thinky-123 commented on Feb 23, 2026

   

   Thinky-123

   on Feb 23, 2026

   More actions

   Hi,

   thanks for building the homeassistant integration.
   There is an action powerbrain.set_meter. Testing is possible under Developer Tools > Actions
   Parameters are also listed there, but I think it doesn't work anymore. My cFos Power Brain only reacts to"power**_w**" instead of "power". Parameter seems to be changed in year 2023 by cfos.
   @mb-software Can you update the code?
5. guibrazlima commented on Mar 14, 2026

   

   guibrazlima

   on Mar 14, 2026

   More actions

   The set_meter service does exactly this. PR #92 adds proper documentation in the README.

   Example — send readings from a HA sensor to cFos HTTP input meter M1:

   service: powerbrain.set_meter
   data:
     dev_id: M1
     power: "{{ states('sensor.battery_power') | int }}"
     import_energy: "{{ states('sensor.battery_import_energy') | float }}"
     export_energy: "{{ states('sensor.battery_export_energy') | float }}"
     current_l1: "{{ states('sensor.battery_current_l1') | float }}"
     voltage_l1: 230

   Make sure the meter in cFos is set to type HTTP Input.
6. Thinky-123 commented on Mar 20, 2026

   

   Thinky-123

   on Mar 20, 2026

   Last edited by Thinky-123

   More actions

   @guibrazlima Thanks for your help and creating the fork!
   set_meter is still not working in all because the paramater needs to be "power_w" instead of "power_va" or "power". It is also mentioned in the documentation: https://www.cfos-emobility.de/en/cfos-power-brain/http-api.htm

   dev_id: M4
   power: "{{ states('sensor.smart_meter_aktuelle_gesamtwirkleistung') | int }}"
   import_energy: "{{ states('sensor.smart_meter_positive_gesamtwirkenergie') | float }}"
   export_energy: "{{ states('sensor.smart_meter_negative_gesamtwirkenergie') | float }}"
   
   

   results in:

   

   But...

   http://192.168.178.11/cnf?cmd=set_ajax_meter&dev_id=M4&power_w=1234&import_wh=1000&export_wh=50
   

   works as expected:
   

   In init.py Line 76 needs to be changed into:

                       data["power_w"] = call.data.get("power")
   

   Tested and it works: