Schneider Electric CCTFR6700 16A Relay - external temperature sensor

Hardware
1

I am trying to integrate a Schneider Electric 16A Relay into my HA setup. The device is correctly recognized as “Schneider Electric CCTFR6700 85cffffe smartenergy thermostat” and I can turn it ON and OFF. However the “local temperature” reading is always -327.7 degrees. The device supports an external temperature sensor - but no details are provided as to the type to use. Anyone know what external temperature sensors are compatible with the CCTFR67000?
Thanks in advance.

2

Probably a DS18b20

3

thanks for the suggestion, but not sure - the pinout only includes two wires and it appears to be more an analog “resistor” type sensor. I could connect the earth - but there is no indication as to which would be DATA and which would be the 5V line. I’ll check the voltage on the two “sensor” pins and see what voltage, if any, there is.

4

maybe a 10k thermositor then? Do you need the on board temp? Simple thermostat lets you use an external temp sensor.

5

The Schneider Electric 16A relay is part of a heating system and in addition to ON/OFF allows a signal to be sent to an electrical heater using a third “control” wire. These heaters are common in France. However to use the “control” functionality, I need to know the temperature in the room. I can achieve this with an external temperature sensor - but then I need a temperature sensor in every room where I want to use the CCTFR6700 - while the device includes connector pins for an “external temperature sensor” and the device can report “local temperature”. Simple analogue temperature sensors are not expensive - but I have no idea which type to use :frowning:

6

According to this it averages the two temps so if one is -300 it will probably do you no good anyway. It also seems to be discontinued. Still no spec on what type of sensor it used.

The EER57200 is a surface mount temperature sensor for use with Wiser
Programmable Communicating Thermostats, models EER56000 and
EER56100. The sensor can be:
•Connected to a Wiser thermostat to monitor the temperature of a remote
location
•Combined with an onboard temperature sensor to average the
temperature of two locations
•Used to monitor the outdoor temperature
The remote temperature sensor is required for Wiser thermostats used in dual
fuel heat pump installations

https://download.schneider-electric.com/files?p_enDocType=Instruction+sheet&p_File_Name=S1B35793.pdf&p_Doc_Ref=S1B35793

e.
Which intergration did you use? Is it through homekit? Is there a homekit code on it? Maybe you’ll get the correct temp :man_shrugging:

7

Looks promising - pity they don’t give some details on the actual sensor itself. The CCTFR6700 can be bought as part of a kit that includes an external temperature sensor - all connected to the Schneider “Wiser” hub - which then manages the 16A Relay “control” wire. I’m trying to bypass that and use the CCTRF6700 to provide the temperature directly. I think the -327 degrees is because no sensor is connected.

8

Hey @ChaletBenadam I also bought the CCTRF6700, I’m trying to bind an external temperature sensor through zigbee using the bind feature of zigbee2mqtt, but wasn’t able to do so. Did you manage to have a working setup ? Recommendations from a fellow french tinkerer would be greatly appreciated :slight_smile:

1 Like
9

This one took me a bit of fiddling but I have it mostly working. For the CCTFR6700 to function properly, it needs to get some feedback from a temperature sensor. This can be done by sending it a payload via an MQTT automation. According to this: Schneider Electric CCTFR6700 control via MQTT | Zigbee2MQTT (and the documentation for the device) it needs a temperature update at least every 10 minutes. So I created a small automation to send the thermostat a the payload every 5 minutes:

alias: Update Heater Local Temps - Kitchen
description: >-
  Send temp readings from temp sensor in kitchen to the schneider heater
  controller
trigger:
  - platform: time_pattern
    minutes: /5
condition: []
action:
  - service: mqtt.publish
    data:
      topic: zigbee2mqtt/sensor_id_here/set
      payload: >-
        {"temperature_measured_value": {{
        states('sensor.my_temperature_sensor') }} }
mode: single

This will also change the light on the device from red/flashing red to green (when heating) and off when OK but not heating.

1 Like
10

Thank you I made 4 Wiser CCTFR6700 working with 4 Aqara WSDCGQ11LM sensors to command my heaters in pilot mode.

11

Hello Kerin,

I would be very interested to learn more about your set up. I want to do a similar thing but use the Aquara occupancy sensor to turn the radiators on and off. Any pointers would be most welcome.

Vous pouvez répondre en français si vous préférez

12

I hope this topic is not dead.
It’s not clear to me where the contrôler id goes.
Thanks.