korrekt calculation of amphours.

better output with more info

src/main.cpp

@@ -4,15 +4,18 @@
 #include "Arduino.h"
 
 #define MINVOLTAGE 2.5
-#define OHM 55
+#define OHM 4.7
+
+#define MEASUREPIN A3
+#define MOSFETPIN A2
 
 void setup() {
     Serial.begin(9600);
     pinMode(LED_BUILTIN, OUTPUT);
-    pinMode(8, OUTPUT);
-    pinMode(A0, INPUT);
+    pinMode(MOSFETPIN, OUTPUT);
+    pinMode(MEASUREPIN, INPUT_PULLUP);
 
-    digitalWrite(8, LOW);
+    digitalWrite(MOSFETPIN, LOW);
 }
 
 int i = 0;
@@ -20,25 +23,37 @@ double all = 0;
 
 void loop() {
     Serial.println();
-    double voltage = (float) (analogRead(A0)) / 1024 * 5;
-    if (voltage > MINVOLTAGE) {
-        digitalWrite(8, HIGH);
+    double voltage = (float) (analogRead(MEASUREPIN)) / 1024 * 5;
+    if (voltage > MINVOLTAGE && voltage < 4.5) {
+        digitalWrite(MOSFETPIN, HIGH);
         double current = voltage / OHM;
         double watt = current * voltage;
-        double amphours = watt / 360;
+        double amphours = current / 360; // every 10secs is a measurement point...
         all += amphours;
         Serial.print(all * 1000, 5);
         Serial.print("mA/h already captured after - ");
         Serial.print(i * 10);
         Serial.println("s");
+
+        Serial.print("Watts: ");
+        Serial.println(watt);
+        Serial.print("Current: ");
+        Serial.println(current);
         i++;
-    } else {
-        digitalWrite(8, LOW);
+    } else if (voltage <= MINVOLTAGE) {
+        digitalWrite(MOSFETPIN, LOW);
         Serial.print("FINISHED voltage below minvoltage - ");
-        Serial.print(all / 1000, 5);
+        Serial.print(all * 1000, 5);
         Serial.print("mA/h in - ");
         Serial.print(i * 10);
         Serial.println("s");
+        Serial.println("please restart the print");
+        delay(999999999);
+    } else if (voltage > 4.2) {
+        Serial.println("no battery connected!");
     }
+    Serial.print("Voltage: ");
+    Serial.println(voltage);
+
     delay(10000);
 }