new time management

src/main.cpp

@@ -4,11 +4,15 @@
 #include "Arduino.h"
 
 #define MINVOLTAGE 2.5
-#define OHM 4.7
+#define OHM 4.9
+
+#define INTERVALTIME 5 // refresh interval in secs
 
 #define MEASUREPIN A3
 #define MOSFETPIN A2
 
+unsigned long oldtime = -1;
+
 void setup() {
     Serial.begin(9600);
     pinMode(LED_BUILTIN, OUTPUT);
@@ -16,9 +20,11 @@ void setup() {
     pinMode(MEASUREPIN, INPUT_PULLUP);
 
     digitalWrite(MOSFETPIN, LOW);
+
+    oldtime = micros();
 }
 
-int i = 0;
+unsigned int time = 0;
 double all = 0;
 
 void loop() {
@@ -28,24 +34,24 @@ void loop() {
         digitalWrite(MOSFETPIN, HIGH);
         double current = voltage / OHM;
         double watt = current * voltage;
-        double amphours = current / 360; // every 10secs is a measurement point...
+        double amphours = current / (3600.0 / INTERVALTIME); // every 10secs is a measurement point...
         all += amphours;
-        Serial.print(all * 1000, 5);
+        Serial.print(all * 1000.0, 5);
         Serial.print("mA/h already captured after - ");
-        Serial.print(i * 10);
+        Serial.print(time * INTERVALTIME);
         Serial.println("s");
 
         Serial.print("Watts: ");
         Serial.println(watt);
         Serial.print("Current: ");
         Serial.println(current);
-        i++;
+        time++;
     } else if (voltage <= MINVOLTAGE) {
         digitalWrite(MOSFETPIN, LOW);
         Serial.print("FINISHED voltage below minvoltage - ");
         Serial.print(all * 1000, 5);
         Serial.print("mA/h in - ");
-        Serial.print(i * 10);
+        Serial.print(time * INTERVALTIME);
         Serial.println("s");
         Serial.println("please restart the print");
         delay(999999999);
@@ -55,5 +61,7 @@ void loop() {
     Serial.print("Voltage: ");
     Serial.println(voltage);
 
-    delay(10000);
+    int delaytime = INTERVALTIME * 1000 - ((micros() - oldtime) / 1000);
+    oldtime = micros();
+    delay(delaytime);
 }