139 lines
3.1 KiB
C++
139 lines
3.1 KiB
C++
/* References:
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* https://lastminuteengineers.com/multiple-ds18b20-arduino-tutorial/
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*/
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#include "ArduinoJson.h"
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#include <OneWire.h>
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#include <DallasTemperature.h>
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#include <LiquidCrystal_I2C.h>
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LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows
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// Data wire is conntec to the Arduino digital pin 4
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#define ONE_WIRE_BUS 2
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#define MOSFET1 3
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#define MOSFET2 4
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// Setup a oneWire instance to communicate with any OneWire devices
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OneWire oneWire(ONE_WIRE_BUS);
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// Pass our oneWire reference to Dallas Temperature sensor
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DallasTemperature sensors(&oneWire);
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DeviceAddress Thermometer;
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int deviceCount = 0;
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int analogPin = 2;
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int data = 0;
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char userInput;
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char* commandVer;
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// temperature values in °C
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float tempSensor1;
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float tempSensor2;
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// HighTemp - when to turn on the power
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float HTemp1 = 12.0;
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float HTemp2 = 16.0;
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// LowTemp - when to turn of the power
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float LTemp1 = 10.0;
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float LTemp2 = 14.0;
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bool fetState1;
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bool fetState2;
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uint8_t addrSensor1[8] = { 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD1, 0xB1, 0x75 };
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uint8_t addrSensor2[8] = { 0x28, 0xFF, 0x64, 0x1F, 0x79, 0xD7, 0xDA, 0x9A };
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void setup() {
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lcd.init(); // initialize the lcd
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lcd.backlight();
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lcd.clear(); // clear display
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lcd.setCursor(0, 0); // move cursor to (0, 0)
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lcd.print("*fridge control*"); // print message at (0, 0)
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lcd.setCursor(0, 1); // move cursor to (0, 0)
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lcd.print(" by DeltaLima");
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delay(1500);
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// display default values
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print("1: H");
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lcd.print(HTemp1);
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lcd.print(" L");
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lcd.print(LTemp1);
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lcd.setCursor(0, 1);
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lcd.print("2: H");
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lcd.print(HTemp2);
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lcd.print(" L");
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lcd.print(LTemp2);
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delay(3500);
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// init MOSFET Pins
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pinMode(MOSFET1, OUTPUT);
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pinMode(MOSFET2, OUTPUT);
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Serial.begin(9600);
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sensors.begin();
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}
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void loop() {
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// get sensor values
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sensors.requestTemperatures();
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tempSensor1 = sensors.getTempC(addrSensor1);
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tempSensor2 = sensors.getTempC(addrSensor2);
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if(tempSensor1 > HTemp1) {
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digitalWrite(MOSFET1, HIGH);
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fetState1 = 1;
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} else if(tempSensor1 < LTemp1) {
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digitalWrite(MOSFET1, LOW);
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fetState1 = 0;
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}
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if(tempSensor2 > HTemp2) {
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digitalWrite(MOSFET2, HIGH);
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fetState2 = 1;
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} else if(tempSensor1 < LTemp1) {
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digitalWrite(MOSFET2, LOW);
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fetState2 = 0;
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}
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// LCD Display
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print("1: ");
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lcd.print(tempSensor1);
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lcd.print(" ");
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lcd.print((char)223);
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lcd.print("C");
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lcd.setCursor(14,0);
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lcd.print("|");
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lcd.print(fetState1);
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lcd.setCursor(0, 1);
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lcd.print("2: ");
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lcd.print(tempSensor2);
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lcd.print(" ");
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lcd.print((char)223);
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lcd.print("C");
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lcd.setCursor(14,1);
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lcd.print("|");
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lcd.print(fetState2);
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// JSON
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StaticJsonDocument<96> jsonOut;
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//jsonOut["sensor"] = "1";
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jsonOut["1"]["temp"] = tempSensor1;
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jsonOut["1"]["state"] = fetState1;
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//jsonOut["sensor"] = "2";
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jsonOut["2"]["temp"] = tempSensor2;
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jsonOut["2"]["state"] = fetState2;
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serializeJson(jsonOut, Serial);
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Serial.println();
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delay(5000);
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}
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