Logical AND syntax in lambda

ESPHome
1

Hiya

I’m playing with an e-ink display attached a nodeMCU running latest ESPehome. In the display component I have :

lambda: |-
      if (id(conditionswd).state == "overcast clouds") {
      it.print(25, 0, id(conditions), "\U000F0590");}

Where conditionswd is previously defined from the open weather provider ie :

- platform: homeassistant
    name: forecast
    id: conditionswd
    entity_id: sensor.openweathermap_weather
    internal: true

That works just fine, but what I really want is to display a different glyph during day or night. I have defined the sun component :

sun:
  latitude: 48.8584
  longitude: 2.2945

and therefore I wanted to achieve something like this :

if ((id(conditionswd).state == "clear sky") && (sun.is_below_horizon == True)){
      it.print(25, 0, id(conditions), "\U000F0594");}

but the syntax checker during compilation (The yaml validator says its fine) complains about sun.is_below_horizon

Any suggestions on the correct syntax ? Thanks

2

Hi

I think sun.is_below_horizon can only be called in the automation framework and is not available in a template. Maybe someone with better C++ skills knows.

But you could get the elevation. So if that is below 0 it should be night.

sensor:
  - platform: sun
    id: elev
    name: Sun Elevation
    type: elevation

Use this statement in your lambda. (id(elev).state <0) for thing during the night.

Maybe a solution.

/Mattias

3

Thanks for your reply, still not working :frowning:

src/main.cpp: In lambda function:
src/main.cpp:591:50: error: expected identifier before '(' token
       if (conditionswd->state == "clear sky") && (elev->state < 0) {

If I remove the parenthesis around it, I get a slightly different error :

src/main.cpp: In lambda function:
src/main.cpp:591:54: error: expected ';' before '->' token
       if (conditionswd->state == "clear sky") && elev->state < 0 {
                                                      ^
src/main.cpp:591:47: warning: statement has no effect [-Wunused-value]
       if (conditionswd->state == "clear sky") && elev->state < 0 {
4

Hi

I looks like you missing a left parenthesis. The the whole statement after if should be in a parenthesis.

Like this:

if ((id(conditionswd).state == "clear sky") && (id(elev).state <0)){
      it.print(25, 0, id(conditions), "\U000F0594");}

/Mattias

1 Like
5

sweet! That compiled, I now have :slight_smile:

if ((id(conditionswd).state == "clear sky") && (id(elev).state <0))  {
      it.print(25, 0, id(conditions), "\U000F0594");}
      
      if ((id(conditionswd).state == "clear sky") && (id(elev).state >0))  {
      it.print(25, 0, id(conditions), "\U000F0599");}

I need it to stop raining to prove it really works :laughing: