Lilygo T-Display S3 on ESPHome?

nickrout · June 14, 2024, 5:03am

The trend arrows are unicode characters, but not every font has them. Finding a font that has all of them can be a bit tricky.

Starting point is here

github.com

nightscout/android-uploader/blob/37d1fe04eca2097c4bbf1e7cdb6580a5d32db1a3/core/src/main/java/com/nightscout/core/dexcom/TrendArrow.java#L12


      
          
          
          import com.nightscout.core.model.G4Trend;
          
          public enum TrendArrow {
              NONE,
              DOUBLE_UP("\u21C8", "DoubleUp"),
              SINGLE_UP("\u2191", "SingleUp"),
              UP_45("\u2197", "FortyFiveUp"),
              FLAT("\u2192", "Flat"),
              DOWN_45("\u2198", "FortyFiveDown"),
              SINGLE_DOWN("\u2193", "SingleDown"),
              DOUBLE_DOWN("\u21CA", "DoubleDown"),
              NOT_COMPUTABLE,
              OUT_OF_RANGE;
          
              private String arrowSymbol;
              private String trendName;
          
              TrendArrow(String arrowSymbol, String trendName) {
                  this.arrowSymbol = arrowSymbol;

All the Unicode details are there.

The nightscout API provides trend as one of the strings like “FortyFiveUp”.

So presently the state of my trend sensor is currently “Flat”. You can template to produce the required Unicode char \u2192.