First init.

DINOCOOL_RLY_MK2/DINOCOOL_RLY_MK2.ino

@@ -0,0 +1,190 @@
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SH110X.h>
+#include <OneWire.h>
+#include <DallasTemperature.h>
+#include <avr/wdt.h>
+
+#define i2c_Address 0x3C // Change this if your OLED has a different I2C address
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+#define OLED_RESET -1
+#define ONE_WIRE_BUS1 2 // D2 pin for the first DS18B20 sensor
+#define ONE_WIRE_BUS2 7 // D7 pin for the second DS18B20 sensor
+#define FAN1_PIN 3      // D3 pin for FAN1
+#define FAN2_PIN 4      // D4 pin for FAN2
+#define OVERRIDE_FAN1_PIN 5 // D5 pin for overriding FAN1 (pulled to ground to activate)
+#define OVERRIDE_FAN2_PIN 6 // D6 pin for overriding FAN2 (pulled to ground to activate)
+
+// 21 characters wide
+// 6 down (plus half)
+
+Adafruit_SH1106G display = Adafruit_SH1106G(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
+OneWire oneWire1(ONE_WIRE_BUS1);
+OneWire oneWire2(ONE_WIRE_BUS2);
+DallasTemperature sensors1(&oneWire1);
+DallasTemperature sensors2(&oneWire2);
+
+bool fan1Active = false;
+bool fan2Active = false;
+
+void enableWatchdog() {
+  cli();
+  wdt_reset();
+  MCUSR = WDRF;
+  WDTCSR |= (1 << WDCE) | (1 << WDE);
+  WDTCSR = (1 << WDIE) | (1 << WDP3) | (1 << WDP0); // Interrupt every 8 seconds
+  sei();
+}
+
+void setup() {
+  Serial.begin(9600);
+
+  pinMode(FAN1_PIN, OUTPUT);
+  pinMode(FAN2_PIN, OUTPUT);
+  pinMode(OVERRIDE_FAN1_PIN, INPUT_PULLUP);
+  pinMode(OVERRIDE_FAN2_PIN, INPUT_PULLUP);
+
+  if (!display.begin(i2c_Address)) {
+    Serial.println(F("SH110X allocation failed"));
+    for (;;);
+  }
+
+  sensors1.begin(); // Initialize the first DS18B20 sensor
+  sensors2.begin(); // Initialize the second DS18B20 sensor
+
+  enableWatchdog(); // Enable watchdog timer
+
+  display.display();
+  delay(2000);
+  display.clearDisplay();
+}
+
+void loop() {
+  wdt_reset(); // Reset watchdog timer
+
+  display.clearDisplay();
+
+  // Set text size and color
+  display.setTextSize(1);
+  display.setTextColor(SH110X_WHITE);
+
+  // Read temperatures from both DS18B20 sensors
+  sensors1.requestTemperatures();
+  sensors2.requestTemperatures();
+  
+  float temperatureC1 = sensors1.getTempCByIndex(0);
+  float temperatureC2 = sensors2.getTempCByIndex(0);
+
+  // Validate temperature readings
+  if (isValidTemperature(temperatureC1)) {
+    // Display temperatures on the screen in Celsius with one decimal place
+    display.setCursor(0, 0);
+    display.print("TempClt1: ");
+    display.print(temperatureC1, 1);
+    display.print(" C");
+  } else {
+    display.setCursor(0, 0);
+    display.print("TempClt1: Invalid");
+  }
+
+  if (isValidTemperature(temperatureC2)) {
+    display.setCursor(0, 10);
+    display.print("TempClt2: ");
+    display.print(temperatureC2, 1);
+    display.print(" C");
+  } else {
+    display.setCursor(0, 10);
+    display.print("TempClt2: Invalid");
+  }
+
+  // Check for override inputs
+  bool overrideFan1 = digitalRead(OVERRIDE_FAN1_PIN) == LOW; // Pulled to ground to activate (active LOW)
+  bool overrideFan2 = digitalRead(OVERRIDE_FAN2_PIN) == LOW; // Pulled to ground to activate (active LOW)
+
+  // Control FANs based on override inputs and temperature thresholds
+  if (overrideFan2) {
+    digitalWrite(FAN1_PIN, HIGH); // Turn ON FAN1
+    digitalWrite(FAN2_PIN, HIGH); // Turn ON FAN2
+    fan1Active = true;
+    fan2Active = true;
+  } else if (overrideFan1) {
+    digitalWrite(FAN1_PIN, HIGH); // Turn ON FAN1
+    fan1Active = true;
+    fan2Active = false; // Deactivate FAN2 if FAN1 override is active
+  } else {
+    // Control FANs based on average temperature threshold
+    float averageTemperature = getAverageTemperature(temperatureC1, temperatureC2);
+
+    if (isValidTemperature(averageTemperature)) {
+      display.setCursor(0, 20);
+      display.print("Temp avg: ");
+      display.print(averageTemperature, 1);
+      display.print(" C");
+
+      if (averageTemperature >= 99.0 && !fan1Active) {
+        digitalWrite(FAN1_PIN, HIGH); // Turn ON FAN1
+        fan1Active = true;
+      }
+
+      if (averageTemperature >= 106.0 && !fan2Active) {
+        digitalWrite(FAN2_PIN, HIGH); // Turn ON FAN2
+        fan2Active = true;
+      }
+
+      if (averageTemperature <= 95.0) {
+        digitalWrite(FAN1_PIN, LOW); // Turn OFF FAN1
+        fan1Active = false;
+      }
+
+      if (averageTemperature <= 99.0) {
+        digitalWrite(FAN2_PIN, LOW); // Turn OFF FAN2
+        fan2Active = false;
+      }
+    } else {
+      display.setCursor(0, 20);
+      display.print("Temp avg: Invalid");
+    }
+  }
+
+  // Display FAN status
+  display.setCursor(0, 30);
+  display.print("FAN1: ");
+  display.print(fan1Active || overrideFan1 ? "ON" : "OFF");
+
+  display.setCursor(64, 30);
+  display.print("FAN2: ");
+  display.print(fan2Active || overrideFan2 ? "ON" : "OFF");
+
+  display.setCursor(45, 55);
+  display.print("PRNDL21");
+
+  // Update the display
+  display.display();
+
+  // Delay for a while
+  delay(2000);
+}
+
+float getAverageTemperature(float temp1, float temp2) {
+  // Calculate average temperature
+  if (isValidTemperature(temp1) && isValidTemperature(temp2)) {
+    return (temp1 + temp2) / 2.0;
+  } else if (isValidTemperature(temp1)) {
+    return temp1;
+  } else if (isValidTemperature(temp2)) {
+    return temp2;
+  } else {
+    return -127.0; // Invalid temperature
+  }
+}
+
+bool isValidTemperature(float temp) {
+  // Check if temperature is within a reasonable range
+  return temp > -100.0 && temp < 150.0;
+}
+
+ISR(WDT_vect) {
+  // Watchdog Timer interrupt service routine
+  // You can add additional handling here if needed
+}