Some improvements...

- Update circuitdiagramm to v1.x
- Improve code to ship v1.1.0

firmware/weckkubator/weckkubator.ino

@@ -1,12 +1,13 @@
 /* Weckkubator - Weck(topf)-(In)kubator
  * 
- * Version 0.1.0
+ * Version 1.1.0
  * 
  * Fliegerjohn - 06.05.2024
+ * 
+ * Have fun!
  */
 
 
-
 #include <Wire.h>  // Support for I2C --> LCD
 #include <LiquidCrystal_I2C.h>  // Support for PCF8574 --> LCD
 #include <OneWire.h>  // 1-Wiresupport for DS18B20
@@ -14,8 +15,8 @@
 #include <PID_v1.h>  // PID-Controller
 
 #define ONE_WIRE_BUS 10  // Enable 1-Wirebus on digital 10 (PB2 - Pin16)
-#define fan 8
-#define wecktopf 9
+#define fan 8 // Fan for cooling the Triac
+#define wecktopf 9  // Triac for wecktopf
 
 LiquidCrystal_I2C lcd(0x3F,20,4);  // declare LCD
 OneWire oneWire(ONE_WIRE_BUS);  // declare 1-Wirebus
@@ -33,6 +34,8 @@ unsigned long windowStartTime;
 // Temp adjustment
 float tempset;
 int poti;
+int potiold;
+int poticlean;
 
 // time
 unsigned long previousMillis;
@@ -73,7 +76,7 @@ void setup() {
   myPID.SetMode(AUTOMATIC);  //turn on the PID
   
   // Greetings
-  lcd.print("Weckkubator 0.1.0");
+  lcd.print("Weckkubator 1.1.0");
   delay(3000);
 
 
@@ -84,14 +87,16 @@ void setup() {
 
 void loop() {
 
+  // read temp
+  readtemp();
+  
   // run pid
   pid();
   
-  // update LCD
+  // update LCD all 250ms
   unsigned long currentMillis = millis();
   if (currentMillis - previousMillis >= 250) {
     settemp();
-    readtemp();
     lcdoutput();
     previousMillis = currentMillis;
   }
@@ -102,6 +107,7 @@ void loop() {
     else digitalWrite(fan, LOW);
     previousMillisFan = currentMillis;
   }
+  
 }
 
 //------------------------------------------
@@ -128,13 +134,14 @@ void readtemp() {
   sensors.requestTemperatures();
   watertemp = sensors.getTempCByIndex(0);
 
-  if (watertemp == -127.00) missingsensor();
+  if (watertemp == -127.00) missingsensor(); // print error if temp -127 (sensor not detected)
   
 }
 
 //------------------------------------------
 // LCD output
 void lcdoutput() {
+  
   // Output temperatureset
   lcd.setCursor(8, 1);
   lcd.print(pidset);
@@ -157,11 +164,15 @@ void lcdoutput() {
 
 
 //------------------------------------------
-// Read Poti
+// Read Poti and calculate the settemp
 void settemp() {
-  poti = analogRead(A3);
-  tempset = (20+(poti*0.04));
   
+  poti = analogRead(A3);
+  poticlean = ((potiold+poti)/2); // Make average with last value so the tempset will not jump to much
+  tempset = (20+(poticlean*0.04));
+  potiold = poti;
+
+  // jump to 80 degrees if tempset above 51 degrees. 
   if (tempset <= 50) {
     pidset = tempset;
   }
@@ -175,22 +186,28 @@ void settemp() {
 //------------------------------------------
 // Missing Sensor
 void missingsensor() {
-  // turn of all output
+  
+  // turn of all output to stop heating
   digitalWrite(wecktopf, LOW);
   digitalWrite(fan, LOW);
 
   // Clear LCD
-    lcd.clear();
+  lcd.clear();
     
+  // keep in loop until it reads a valid temp  
   do {
+    // print errormessage
     lcd.setCursor(0, 0);
     lcd.print("Error:");
     lcd.setCursor(0, 1);
     lcd.print("Missing Sensor");
+    // read sensor
     sensors.requestTemperatures();
     watertemp = sensors.getTempCByIndex(0);
+    
     } while (watertemp == -127.00);
 
+  // set back the display
   setupdisplay();
 }