Hygrometer: add DHT_I2C_NANO_BACKPACK resolution without test

Forkses · Feb 20, 2018 · 904b79d · 904b79d
1 parent 376184a
commit 904b79d
Showing 1 changed file with 15 additions and 1 deletion.
diff --git a/lib/hygrometer.js b/lib/hygrometer.js
@@ -96,8 +96,22 @@ var Controllers = {
       }
     },
     toRelativeHumidity: {
+      // DHT11
+      // Datasheet available at http://www.micropik.com/PDF/dht11.pdf
+      // From Table at page 4
+      // Typical resolution 1%RH
+      //
+      // DHT21
+      // Datasheet available at https://kropochev.com/downloads/humidity/AM2301.pdf
+      // From paragraph 5 at page 2
+      // Resolution 0.1%RH
+      //
+      // DHT22
+      // Datasheet available at https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf
+      // From paragraph 3 at page 2
+      // Resolution 0.1%RH
       value: function(raw) {
-        return raw / 100;
+        return toFixed(raw / 100, 1);
       }
     }
   },