Temp based status leds not working (esp8266)

ESPHome
1

Hi. I am using an ESP8266 with temp sensor and two status leds (green & red). Green is active below 8 degrees, and red is active and flashing above 8 degrees.

I have the following code:

sensor:
  - platform: dallas
    address: ***
    name: "unit_2"
    unit_of_measurement: "°C"
    on_value_range:
        - above: 8
          then:
            - light.turn_on: 
                id: "red_led_light_unit_2"
            - switch.turn_off: "green_led_switch_unit_2"
        - below: 8
          then:
            - light.turn_off:   
                id: "red_led_light_unit_2"
            - switch.turn_on: "green_led_switch_unit_2"

Sometimes it switches to the green led when below the threshold, and sometimes it doesn’t.

When I heat the probe by holding it in my hand and then placing it in cold water it always switches correctly.
However, when allowed to cool in a fridge, it fails to switch every now and again. I can see that the temperature in the fridge is indeed correct as I have a second probe showing the same temperature. The only difference then is the speed at which the probe cools down.

Any ideas as to what could be causing it?

2

You have update_interval: added to dallas: for example, 10s.
The default value for resetting Dallas values is I guess 60s
You have a Dallas resistor between data and + 4k7 ?
I would not give the value 8 for both states because it is calculated inclusive and automation sometimes probably does not know what to do if the values are the same

1 Like
3

Yes. I have the dallas, but with 1s update interval. Could that cause it?

What would happen if the limits are different? If I set for example above 8 but below 7. Then it would be one degree grey zone?

4

Ok interval I would raise higher. If that doesn’t help, I would put temperatures above 8.1 and below 8, for example

5

The gray zone will always be here. If you extend the interval, the temperature will drop or rise before the new data is read and that time is a gray zone

6

Ah ok, perhaps the solution is that simple. I’ll try it later today.

EDIT: The decrease update frequency seems to have done the trick. Marke the solution, thanks.