push

ARDUINO TEMPERATURE CODE

+#include <SPI.h>
+#include <WiFiNINA.h>
+#include <ThingSpeak.h>
+#include <math.h>
+
+// Internet capability
+WiFiClient client;
+char ssid[] = "VM0729577";
+char pass[] = "fch2sfdgCrS9";
+int status = WL_IDLE_STATUS;
+
+// ThingSpeak connectivity
+unsigned long channelNo = 2401967;
+const char * writeAPI = "Y4XA01Y4PZSJXXJB";
+
+// Definitions
+const int B = 4275;             // B value of the thermistor
+const int R0 = 100000;          // R0 = 100k resistance
+const int pinTempSensor = A0;   // Sensor connected at A0
+const int buzzerPin = 4;        // Buzzer pin 
+const int ledPin = 3;           // LED pin
+
+// Debug for Serial
+#if defined(ARDUINO_ARCH_AVR)
+#define debug  Serial
+#elif defined(ARDUINO_ARCH_SAMD) ||  defined(ARDUINO_ARCH_SAM)
+#define debug  SerialUSB
+#else
+#define debug  Serial
+#endif
+
+// Buzzer sound
+#define TONE_1 100
+
+void setup()
+{
+    Serial.begin(9600);
+    WiFi.begin(ssid, pass);
+    ThingSpeak.begin(client);
+}
+
+void loop()
+{
+    int a = analogRead(pinTempSensor);
+    float R = 1023.0 / a - 1.0;
+    R = R0 * R;
+
+    // Kelvin to Celsius
+    // Due to undervolting of 5V pin (4.95V), actual temperature is
+    // 5 degrees Celsius higher than normal, so a calibration
+    // of -5 was made
+    float temp = 1.0 / (log(R / R0) / B + 1 / 293.15) - 273.15;
+
+    Serial.println(F("TEMPERATURE "));
+    Serial.println(temp);
+    delay(3000);
+
+    // main device function
+    if (temp > 24 || temp < 15)
+    {
+      // 2 quick flashes and beeps every 3 seconds
+      digitalWrite(ledPin, HIGH);
+      digitalWrite(buzzerPin, HIGH);
+      tone(buzzerPin, TONE_1);
+      delay(100);
+
+      noTone(buzzerPin);
+      digitalWrite(ledPin, LOW);
+      digitalWrite(buzzerPin, LOW);
+      delay(100);
+
+      digitalWrite(ledPin, HIGH);
+      digitalWrite(buzzerPin, HIGH);
+      tone(buzzerPin, TONE_1);
+      delay(100);
+
+      noTone(buzzerPin);
+      digitalWrite(ledPin, LOW);
+      digitalWrite(buzzerPin, LOW);
+      delay(3000);
+    }
+    // LED will flash but no sound when under comfort level
+    else if (temp < 19)
+    {
+      digitalWrite(ledPin, LOW);
+      delay(100);
+      digitalWrite(ledPin, HIGH);
+      delay(100);
+
+      digitalWrite(ledPin, LOW);
+      delay(100);
+      digitalWrite(ledPin, HIGH);
+      delay(100);
+
+      digitalWrite(ledPin, LOW);
+      delay(100);
+      digitalWrite(ledPin, HIGH);
+      delay(3000);
+    }
+    // LED will stay on when idle
+    else
+    {
+      digitalWrite(ledPin, HIGH);
+    }
+
+    ThingSpeak.setField(1,temp);
+    ThingSpeak.writeFields(channelNo, writeAPI);
+}