Add Moisture to TTN.js

AgroSense_Soil Moisture_Sensor_LoRaWAN/TTN.js

@@ -1,14 +1,30 @@
 function decodeUplink(input) {
+
+    // Optionally define max and min values for ADC
+    // Un-comment the variable value and change to suit your needs
+    var adcMax; //= 1500; // adcMax is "dry" soil
+    var adcMin; //= 1200; // adcMin is "wet" soil
 
+    // User defined number of decimal places as a variable
+    var decimalPlaces = 2;
+
+    // Variables calculated from device payload
     // var num = input.bytes[0] * 256 + input.bytes[1]
-    var bat = input.bytes[4] / 10.0
-    var adc = input.bytes[2] * 256 + input.bytes[3]
+    var Battery = (input.bytes[4] / 10.0).toFixed(decimalPlaces);
+    var ADC = input.bytes[2] * 256 + input.bytes[3];
+
+    // Prepare the data object
+    var data = {
+        Battery: Battery,
+        ADC: ADC
+    };
 
-    return {
-        data: {
-            field1: bat,
-            field2: adc,
-        },
+    // Only calculate and add Moisture if adcMax and adcMin are defined
+    if (adcMax !== undefined && adcMin !== undefined) {
+        var Moisture = ((Math.max(0, Math.min(100, ((adcMax - ADC) / (adcMax - adcMin)) * 100)))
+                        .toFixed(decimalPlaces));
+        data.Moisture = Moisture;
+    }
 
-    };
-}
+    return { data: data };
+}