Hi guys,
i have an ESP with a dth22 connected
- platform: dht
model: DHT22
pin: GPIO23
temperature:
name: ${name} "Temperature"
id: dht22_t1
humidity:
name: ${name} "Humidity"
id: dht22_h1
I also defined a home assistant based sensor
platform: homeassistant
name: "HA Temp"
id: "ha_t"
entity_id: sensor.ha_temp
I would like to set a thermostat component that is based on the Home assistant sensor (if available) but if it is not available it is based on the dht22 sensor
it’s possible?
how?
climate:
- platform: thermostat
id: "winter"
name: ${name} "winter"
sensor: IF AVAILABLE ha_t ELSE dht22_t1
default_target_temperature_low: 20.5 °C
heat_action:
- switch.turn_on: OU8
idle_action:
- switch.turn_off: OU8
nickrout
(Nick Rout)
August 21, 2020, 10:28pm
2
I think you’ll need a tempoate sensor https://next.esphome.io/components/sensor/template.html which contains the “if sensor a is available use its value, otherwise use that value”
Then use the template sensor in the climate component.
MattW2
(Matt W)
May 28, 2021, 3:29am
3
@blademckain , not sure if you found a solution but here is the yaml I am using to average 2 temperature sensors together. In your example where you want to use this as the input into a climate thermostat you would define your sensor as “demo_temperature_average”
sensor:
- platform: dht
pin: D1
model: DHT22
temperature:
id: "demo_temperature_1"
name: "Demo Temperature 1"
humidity:
id: "demo_humidity_1"
name: "Demo Humidity 1"
update_interval: 5s
- platform: dht
pin: D2
model: DHT22
temperature:
id: "demo_temperature_2"
name: "Demo Temperature 2"
humidity:
id: "demo_humidity_2"
name: "Demo Humidity 2"
update_interval: 5s
- platform: template
id: "demo_temperature_average"
name: "Demo Temperature Average"
unit_of_measurement: "°C"
accuracy_decimals: 1
lambda: |-
return (id(demo_temperature_1).state + id(demo_temperature_2).state)/2;
update_interval: 5s
1 Like
robi
(Robert)
March 23, 2022, 1:52pm
4
With protecttion against unavailable sensors:
lambda: |-
float sum = 0;
uint16_t cnt = 0;
if (!std::isnan(id(demo_temperature_1).state)) {
sum += id(demo_temperature_1).state;
cnt += 1;
}
if (!std::isnan(id(demo_temperature_2).state)) {
sum += id(demo_temperature_2).state;
cnt += 1;
}
if (cnt == 0) {
return NAN;
} else {
return (sum / cnt);
}
4 Likes
Just wondering if I wanted to use 3 temps would it be like this:
lambda: |-
float sum = 0;
uint16_t cnt = 0;
if (!std::isnan(id(demo_temperature_1).state)) {
sum += id(demo_temperature_1).state;
cnt += 1;
}
if (!std::isnan(id(demo_temperature_2).state)) {
sum += id(demo_temperature_2).state;
cnt += 1;
}
if (!std::isnan(id(demo_temperature_3).state)) {
sum += id(demo_temperature_3).state;
cnt += 1;
}
if (cnt == 0) {
return NAN;
} else {
return (sum / cnt);
}