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edit README note on external temperature sensor

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README.md
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@ -388,9 +388,11 @@ climate:
It is possible to use an external temperature sensor to tell the heat pump what
the room temperature is, rather than relying on its internal temperature
sensor. You can do this by calling `set_remote_temperature(float temp)` on the
`mitsubishi_heatpump` object in a lambda. Note that you can call
`set_remote_temperature(0)` to switch back to the internal temperature sensor.
sensor. This is helpful if you want to make sure that a particular room, or part
of the room, reaches the desired temperature—rather than just the area near the
heat pump or the thermostat. You can do this by calling `set_remote_temperature(float temp)`
on the `mitsubishi_heatpump` object in a lambda. (If needed, you can call
`set_remote_temperature(0)` to switch back to the internal temperature sensor.)
There are several ways you could make use of this functionality. One is to use
a sensor automation:
@ -402,7 +404,7 @@ climate:
id: hp
sensor:
# You could use a Bluetooth temperature sensor
# You could use a Bluetooth temperature sensor as the source...
- platform: atc_mithermometer
mac_address: "XX:XX:XX:XX:XX:XX"
temperature:
@ -411,7 +413,7 @@ sensor:
then:
- lambda: 'id(hp).set_remote_temperature(x);'
# Or you could use a HomeAssistant sensor
# ...or you could use a Home Assistant sensor as the source
- platform: homeassistant
name: "Temperature Sensor From Home Assistant"
entity_id: sensor.temperature_sensor
@ -419,10 +421,17 @@ sensor:
then:
- lambda: 'id(hp).set_remote_temperature(x);'
```
One issue that you might have here is that, after some amount of time with no update from the
external temperature sensor, the heat pump will revert back to its internal temperature.
You can prevent this by [adding a `heartbeat` filter](https://github.com/geoffdavis/esphome-mitsubishiheatpump/issues/31#issuecomment-1207115352)
to the sensor, which will keep reminding the heat pump of the external sensor value.
Alternatively you could define a
Also, if your external sensor is in Fahrenheit, you will have to [convert the value to Celsius](https://github.com/geoffdavis/esphome-mitsubishiheatpump/issues/31#issuecomment-1207115352).
Alternatively, you could define a
[service](https://www.esphome.io/components/api.html#user-defined-services)
that HomeAssistant can call:
that Home Assistant can call:
```yaml
api: