Nested 'if' conditions in ESPhome action?

ESPHome
1

Hi guys. I’ve spent an hour or so searching for an example or clue on how one creates an ESPhome ‘if’ condition statement that contains a second ‘if’ condition inside it, and found nothing obvious.

Has anyone done it and got an example ?
I’ve tried hacking at my code but get validation errors of one type or another.
In my action code a want to check a binary sensor (switch) on the ESP32 is true/on, and check a LED on another gpio for state false/off before moving a servo. Can paste code, but there must be a nested ‘if condition’ around someplace ?

2

Sorted it myself with when I found the right info.
I need to stop thinking in C++ nesting terms and switch to HA YAML coding (I find this flipping between coding styles very hard to do (C, C++, JSON, YAML, etc)).
I remember when it was just assembler (and machine code) !

For anyone else, this was what I couldn’t find earlier, just did not fluke the right google string till late last night. The states to be checked are stacked (not nested) under the and: modifier.

ESPhome and/or/not conditions

    on_press:
      then:
        if:
          condition:
            and:
              - binary_sensor.is_on: esp32_local_switch
              - light.is_off: ha_remote_blocking
          then:
            - output.turn_on: yellow_led
#            - output.turn_on: esp32_blue_led
            - output.set_level:
                id: gpio_21_servo
                level: 100.0% # 100% = 2mS as set by 'max_power'
            - delay: 700ms    
            - output.set_level:
                id: gpio_21_servo
                level: 0.0%  # 0% = 1mS as set by 'min_power'
          else:
            - output.turn_on: yellow_led
7 Likes
3

Thanks for the share as I had given up on that in the past not having found the right way :wink:

4

Google can be very cruel when you don’t know enough to ask the right question (search)…

5

FORTH - the power and speed of assembly in a structured language. sigh

6

And what if we would like:

  • if value is in range a-b: then: switch.toggle: relay1
  • if value is in range d-e: then: switch.toggle: relay2
  • if value is in range g-h: then: switch.toggle: relay3
    ?
7
8

@nickrout of course I were there. But there is no 3 ranges example. And simple using it 3 times

    on_value_range:
      above: 5
      below: 10
      then:
        - switch.turn_on: relay_1
    on_value_range:
      above: 25
      below: 30
      then:
        - switch.turn_on: relay_2
    on_value_range:
      above: 45
      below: 50
      then:
        - switch.turn_on: relay_3

do not works.

9

“Do not works” is not much of an error report.

10

I understand, sorry but ESPhome is not saying too much, just:
duplicate key: "on_value_range"
And is indicating the line with second on_value_range

11

Does this work ?

 on_value_range:
   - above: 5
     below: 10
     then:
       - switch.turn_on: relay_1
   - above: 25
     below: 30
     then:
       - switch.turn_on: relay_2
   - above: 45
     below: 50
     then:
       - switch.turn_on: relay_3

based on the docs:

sensor:
  - platform: dht
    humidity:
      name: "Living Room Humidity"
      on_value_range:
        - above: 65.0
          then:
            - switch.turn_on: dehumidifier1
        - below: 50.0
          then:
            - switch.turn_off: dehumidifier1
    temperature:
      name: "Living Room Temperature"
12

Nope. Doesn’t work. The error is
duplicate key: "above"

EDIT:
for others: dashes! sorry. with dashes before above it works.

13

OK, worth a try. Maybe try a lambda ?

14

This should be a feature request, it would be very useful. For now, a lambda should work nicely.

1 Like
15

This is exactly the problem I’ve been trying to solve for the last few hours, but I have 8 ‘if’ conditions.

I have no clue where to start with the Lambda solution. Could someone point me in the right direction please?

I have a wind vane that outputs between 0V and 2.0V for 360’ of wind direction.

I just want to generate text for each 1/8 of the compass. N, NE, W etc.

I have a longwinded clunky solution using 8 switches but am not happy with the room it takes up.

16

This sounds like a ‘case’ statement in Arduino coding. A port of that concept would be good.
A lot of us have trouble with the lambda syntax…
https://www.arduino.cc/en/Reference.SwitchCase

17

I use something similar, maybe something like this ?

make sure you set the voltage sensor to the id below

text_sensor:
  - platform: template
    name: "Wind Direction"
    lambda: !lambda |-
      if (id(voltage).state)>=0.000 and (id(voltage).state)<0.250 {
        return N;
      if (id(voltage).state)>=0.250 and (id(voltage).state)<0.500 {
        return NE;
      if (id(voltage).state)>=0.500 and (id(voltage).state)<0.750 {
        return E;
      if (id(voltage).state)>=0.750 and (id(voltage).state)<1.000 {
        return SE;
      if (id(voltage).state)>=1.000 and (id(voltage).state)<1.250 {
        return S;
      if (id(voltage).state)>=1.250 and (id(voltage).state)<1.500 {
        return SW;
      if (id(voltage).state)>=1.500 and (id(voltage).state)<1.750 {
        return W;
      if (id(voltage).state)>=1.750 and (id(voltage).state)<=2.000 {
        return NW;
      } else {
        return NaN;
      }
    update_interval: 60s
1 Like
18

Excellent! Thank you. I’ll give that a try tonight.

EDIT: Couldn’t wait so gave it a try. I’m getting this compilation error:

src/main.cpp: In lambda function:
src/main.cpp:322:33: error: expected primary-expression before '>=' token
       if (wind_direction->state)>=0.000 and (wind_direction->state)<0.250 {
                                 ^
src/main.cpp:322:75: error: expected ';' before '{' token
       if (wind_direction->state)>=0.000 and (wind_direction->state)<0.250 {
                                                                           ^
src/main.cpp:349:1: error: expected '}' at end of input
 }
 ^
src/main.cpp:349:1: warning: no return statement in function returning non-void [-Wreturn-type]
src/main.cpp: In function 'void setup()':
src/main.cpp:349:1: error: expected ')' at end of input

What am I missing after the (wind_direction->state)?

19

Closer, closer;) And how it should be to have switch.turn_on as a result of condition?

BTW I made suggested feature reqest.

20

Whoops

text_sensor:
  - platform: template
    name: "Wind Direction"
    lambda: !lambda |-
      if (id(wind_direction).state)>=0.000 and (id(wind_direction).state)<0.250 {
        return {"N"};
      }
      if (id(wind_direction).state)>=0.250 and (id(wind_direction).state)<0.500 {
        return {"NE"};
      }
      if (id(wind_direction).state)>=0.500 and (id(wind_direction).state)<0.750 {
        return {"E"};
      }
      if (id(wind_direction).state)>=0.750 and (id(wind_direction).state)<1.000 {
        return {"SE"};
      }
      if (id(wind_direction).state)>=1.000 and (id(wind_direction).state)<1.250 {
        return {"S"};
      }
      if (id(wind_direction).state)>=1.250 and (id(wind_direction).state)<1.500 {
        return {"SW"};
      }
      if (id(wind_direction).state)>=1.500 and (id(wind_direction).state)<1.750 {
        return {"W"};
      }
      if (id(wind_direction).state)>=1.750 and (id(wind_direction).state)<=2.000 {
        return {"NW"};
      } else {
        return {"NaN"};
      }
    update_interval: 60s