// Define the pins for the button, LED, temperature sensor, and buzzer
const int ledPin = 12; 
const int TempPin = A1; // detect the temperature of the plant


int sensorValue; // raw analog data
int sensorMV; //corresponding voltage
float tempCent; // degrees Celsius


void setup() {
  // this is for the temp part
  pinMode(ledPin, OUTPUT); // green led
  pinMode(TempPin, INPUT); // temp sensor
  Serial.begin(9600); // Initialize the serial communication for debugging
}


void loop() {
  // read the temp
  sensorValue = analogRead(TempPin);
  sensorMV = map(sensorValue, 0, 1023, 0, 4999);
  tempCent = (sensorMV - 500) / 10.0;
  Serial.print("Temperature:");
  Serial.print(tempCent);
  Serial.println(" deg C"); //show as Celsius
  // check if the temp is above the fire threshold


if (tempCent >= 25) {
  digitalWrite(ledPin, HIGH); // when temp >=25, turn on the green light, the plant need to cold down
} else {
  digitalWrite(ledPin, LOW); // temp is ok
 }
    delay(1000);
}
#include <CapacitiveSensor.h>
const int buzzer = 8; // 
const int led = 7; // detect the temperature of the plant


// Set the Send Pin & Receive Pin.
CapacitiveSensor cs_12_3 = CapacitiveSensor(2, 4);
int pos = 0;
void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  // turn off auto calibrate on channel
  cs_12_3.set_CS_AutocaL_Millis(0xFFFFFFFF);
}
void loop() {
  // Set the sensitivity of the sensors.
  long touch1 = cs_12_3.capacitiveSensor(300);
Serial.print(touch1);
Serial.print("\n"); // Add a newline character at the end of the print statement
delay(2000);
  // When we touch the sensor, the buzzer will produce a tone.
  if (touch1 > 300) {
    tone(buzzer, 400);
  } else {
    // When we don't touch it, no tone is produced.
    noTone(buzzer);
  }
  if (touch1 >= 200 && pos == 0) {
    digitalWrite(led, HIGH);
    pos = 1;
    delay(100);
  } else if (touch1 >= 200 && pos == 1) {
    digitalWrite(led, LOW);
    pos = 0;
    delay(100);
  }
  delay(10);
}
const int dry = 579; // value for dry sensor
const int wet = 324; // value for wet sensor
void setup() {
  Serial.begin(9600);
  pinMode(A0, INPUT); // Configure A0 pin as input
}
void loop() {
  int sensorVal = analogRead(A0);
  // Check if sensorVal is within the valid range
  if (sensorVal >= wet && sensorVal <= dry) {
    int percentageHumidity = map(sensorVal, dry, wet, 0, 100);
    Serial.print(percentageHumidity);
  } else {
    // Sensor value is outside the valid range, set humidity to 0
    Serial.print(0);
  }
  Serial.println(“%”);
  delay(100);
}