Some timetunings

firmware/weckkubator/weckkubator.ino

@@ -16,17 +16,16 @@ DallasTemperature sensors(&oneWire);  // declare sensors
 double pidset, watertemp, output;
 
 // PID adjustment
-double Kp=2, Ki=5, Kd=1;
+double Kp=500, Ki=10, Kd=0;
 PID myPID(&watertemp, &output, &pidset, Kp, Ki, Kd, DIRECT);
 int WindowSize = 5000;
 unsigned long windowStartTime;
 
 // Temp adjustment
-int tempset;
+float tempset;
 int poti;
 
 // time
-int onesecond = 1000;
 unsigned long previousMillis;
 
 
@@ -67,7 +66,26 @@ void setup() {
   lcd.print("Weckkubator 0.0.1");
   delay(3000);
   lcd.clear();
-  
+
+  // Setup LCD
+  // Output temperatureset
+  lcd.setCursor(0, 1);
+  lcd.print("set:    ");
+  lcd.print(pidset);
+  lcd.write((byte)0);
+
+  // Output watertemp
+  lcd.setCursor(0, 2);
+  lcd.print("temp:   ");
+  lcd.print(watertemp);
+  lcd.write((byte)0);
+  lcd.print("C");
+
+  // output PID
+  lcd.setCursor (0, 3);
+  lcd.print("output: ");
+  lcd.print(output);
+
 }
 
 void loop() {
@@ -77,11 +95,13 @@ void loop() {
 
   // update LCD
   unsigned long currentMillis = millis();
-  if (currentMillis - previousMillis >= onesecond) {
+  if (currentMillis - previousMillis >= 250) {
     settemp();
     readtemp();
     lcdoutput();
+    previousMillis = currentMillis;
   }
+  
 }
 
 //------------------------------------------
@@ -89,10 +109,7 @@ void loop() {
 void pid() {
 
   myPID.Compute();
-
+  
-  /************************************************
-   * turn the output pin on/off based on pid output
-   ************************************************/
   if (millis() - windowStartTime > WindowSize)
   { //time to shift the Relay Window
     windowStartTime += WindowSize;
@@ -117,23 +134,20 @@ void readtemp() {
 // LCD output
 void lcdoutput() {
   // Output temperatureset
-  lcd.setCursor(0, 1);
+  lcd.setCursor(8, 1);
-  lcd.print("set: ");
+  lcd.print(pidset);
-  lcd.print(tempset);
   lcd.write((byte)0);
   lcd.print("C");
 
   // Output watertemp
-  lcd.setCursor(0, 2);
+  lcd.setCursor(8, 2);
-  lcd.print("temp: ");
   lcd.print(watertemp);
   lcd.write((byte)0);
   lcd.print("C");
   lcd.print("   ");
 
   // output PID
-  lcd.setCursor (0, 3);
+  lcd.setCursor (8, 3);
-  lcd.print("output: ");
   lcd.print(output);
   lcd.print("   ");
 
@@ -144,6 +158,15 @@ void lcdoutput() {
 // Read Poti
 void settemp() {
   poti = analogRead(A3);
-  tempset = (18+(poti*0.07));  // range between 18°C and 18+1024*0,07 (~89°C)
+  tempset = (20+(poti*0.04));
-  pidset = tempset;
+
+  if (tempset <= 50) {
+    pidset = tempset;
+  }
+
+  if (tempset >= 51) {
+    pidset = (tempset+30);
+  }
+
+  
 }