142 lines
3.1 KiB
C++
142 lines
3.1 KiB
C++
#include <LiquidCrystal_I2C.h>
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#include <SoftwareSerial.h>
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//temp sensor
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#include <OneWire.h>
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#include <DallasTemperature.h>
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LiquidCrystal_I2C lcd(0x3F,20,4); //https://github.com/marcoschwartz/LiquidCrystal_I2C
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OneWire oneWire(4); //OneWire Library (with Tim Stud)
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DallasTemperature tsensor(&oneWire); //DallasTempratureSensor Library
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SoftwareSerial wlan(6, 5); //RX, TX
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long lastLCDupdate = millis();
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int temp = 0;
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byte cancelcause = 0; //why is the heater off? -> 0= None, 1 = canceled, 2= temp, 3=to long on
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long heating = -1;//millis() value when heater started
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char* status = "--------------------";
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void setup() {
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pinMode(2, OUTPUT);
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pinMode(3, INPUT_PULLUP);
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digitalWrite(2, LOW);
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lcd.init(); // initialize the lcd
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// Print a message to the LCD.
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lcd.backlight();
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lcd.setCursor(6,0);
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lcd.print("Autokocher");
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lcd.setCursor(3,1);
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lcd.print("Yannis Gerlach");
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delay(1000);
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tsensor.begin();
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wlan.begin(9600);
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updateLCD();
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}
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int getTemp() {
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tsensor.requestTemperatures();
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return (tsensor.getTempCByIndex(0)*100);
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}
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void updateLCD() {
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lcd.clear();
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lcd.clear();
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lcd.setCursor(0,0);
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lcd.print("Herd:");
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lcd.setCursor(15,0);
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lcd.print(heating > 0 ? "An" : "Aus");
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lcd.setCursor(0,1);
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lcd.print("Temp:");
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lcd.setCursor(15,1);
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lcd.print(temp);
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lcd.print("C");
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lcd.setCursor(0,2);
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if(cancelcause != 0) {
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lcd.print("Abbruch Grund:");
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lcd.setCursor(15,2);
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switch (cancelcause) {
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case 1: lcd.print("Abbr."); break;
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case 2: lcd.print("Temp"); break;
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case 3: lcd.print("Zeit"); break;
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default: lcd.print("undef.");
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}
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} else if(heating > 0) {
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lcd.print("An seit:");
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lcd.setCursor(15,2);
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lcd.print((millis()-heating)/1000);
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lcd.print("s");
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}
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lcd.setCursor(0,3);
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lcd.print(status);
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lastLCDupdate = millis();
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}
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void handleWLAN() {
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if(wlan.available()) {
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char first = wlan.read();
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if(first == 's') {
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//status update
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bool ava = true;
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for(unsigned char i = 0; i < 20; i++) {
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status[i] = ' ';
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if(wlan.available() && ava) {
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status[i] = wlan.read();
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if(status[i] == '\0') {
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ava = false;
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status[i] = ' ';
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}
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}
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}
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}
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}
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}
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bool presed = false;
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void loop() {
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delay(25);
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handleWLAN();
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temp = getTemp()/100;
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if((millis() - lastLCDupdate) > 500) {//reprint LCD every 2 seconds
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updateLCD();
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}
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if(digitalRead(3) == LOW) {
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if(!presed) {
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presed = true;
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//toggle
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if(heating > 0) {
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cancelcause = 1;
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}
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setheater(heating < 0);
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updateLCD();
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}
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} else {
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presed = false;
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}
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if(heating > 0 && temp > 97) {//stop
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setheater(false);
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cancelcause = 2;
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}
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if(heating > 0 && millis() - heating > 600000) {//longer on tha 10min
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cancelcause = 3;
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setheater(false);
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}
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}
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void setheater(bool on) {
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heating = on ? millis() : -1;
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if(on)
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cancelcause = 0;
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digitalWrite(2, on);
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digitalWrite(13, on);
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}
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