firmware/weckkubator/weckkubator.ino

@@ -2,67 +2,28 @@
 #include <LiquidCrystal_I2C.h>  // Support for PCF8574 --> LCD
 #include <OneWire.h>  // 1-Wiresupport for DS18B20
 #include <DallasTemperature.h>  // Easy reading of DS18B20
-#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
 
 LiquidCrystal_I2C lcd(0x3F,20,4);  // declare LCD
 OneWire oneWire(ONE_WIRE_BUS);  // declare 1-Wirebus
 DallasTemperature sensors(&oneWire);  // declare sensors 
 
-// Define variables PID is connected to
-double pidset, watertemp, output;
-
-// PID adjustment
-double Kp=2, Ki=5, Kd=1;
-PID myPID(&watertemp, &output, &pidset, Kp, Ki, Kd, DIRECT);
-int WindowSize = 5000;
-unsigned long windowStartTime;
-
-// Temp adjustment
-int tempset;
+float tempset;
+float watertemp;
 int poti;
 
-// time
-int onesecond = 1000;
-unsigned long previousMillis;
-
-
-// °C for LCD
-byte customChar[8] = {
-  0b01110,
-  0b01010,
-  0b01010,
-  0b01110,
-  0b00000,
-  0b00000,
-  0b00000,
-  0b00000
-};
-
 void setup() {
-  
   // Setup GPIO
-  pinMode(wecktopf, OUTPUT);  // Output "Wecktopf"
-  pinMode(fan, OUTPUT);  // Fan
-  
+  pinMode(9, OUTPUT);  // Output "Wecktopf"
+  pinMode(8, OUTPUT);  // Fan
   // Setup sensors
   sensors.begin();
-  
   // Setup I2C-LCD
   lcd.init();
   lcd.backlight();
   lcd.clear();
-  lcd.createChar(0, customChar);
   lcd.setCursor(1, 0);
-  
-  // Setup PID
-  windowStartTime = millis();
-  myPID.SetOutputLimits(0, WindowSize);  //tell the PID to range between 0 and the full window size
-  myPID.SetMode(AUTOMATIC);  //turn the PID on
-  
   // Greetings
   lcd.print("Weckkubator 0.0.1");
   delay(3000);
@@ -71,34 +32,23 @@ void setup() {
 }
 
 void loop() {
+  //
+  settemp();
+  readtemp();
+  lcdoutput();
+
+  delay(100);
+  
+  if (tempset >= watertemp) {
+    digitalWrite(9, HIGH);
 
-  // run pid
-  pid();
     
-  // update LCD
-  unsigned long currentMillis = millis();
-  if (currentMillis - previousMillis >= onesecond) {
-    settemp();
-    readtemp();
-    lcdoutput();
   }
-}
+  else {
+    digitalWrite(9, LOW);
 
-//------------------------------------------
-// PID-Controller
-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;
   }
-  if (output < millis() - windowStartTime) digitalWrite(wecktopf, LOW);
-  else digitalWrite(wecktopf, HIGH);
+  
 }
 
 //------------------------------------------
@@ -118,32 +68,18 @@ void readtemp() {
 void lcdoutput() {
   // Output temperatureset
   lcd.setCursor(0, 1);
-  lcd.print("set: ");
+  lcd.print("s:");
   lcd.print(tempset);
-  lcd.write((byte)0);
-  lcd.print("C");
 
   // Output watertemp
-  lcd.setCursor(0, 2);
-  lcd.print("temp: ");
+  lcd.setCursor(9, 1);
+  lcd.print("t:");
   lcd.print(watertemp);
-  lcd.write((byte)0);
-  lcd.print("C");
-  lcd.print("   ");
-
-  // output PID
-  lcd.setCursor (0, 3);
-  lcd.print("output: ");
-  lcd.print(output);
-  lcd.print("   ");
-
 }
 
-
 //------------------------------------------
 // Read Poti
 void settemp() {
   poti = analogRead(A3);
-  tempset = (18+(poti*0.07));  // range between 18°C and 18+1024*0,07 (~89°C)
-  pidset = tempset;
+  tempset = (poti*0.1);
 }