#define POTENTIOMETER_PIN 36  // ESP32 pin GPIO36 (ADC0) connected to Potentiometer pin
#define RELAY_PIN         22  // ESP32 pin GPIO27 connected to Relay's pin
#define ANALOG_THRESHOLD  1000

void setup() {
  pinMode(RELAY_PIN, OUTPUT); // set ESP32 pin to output mode
}

void loop() {
  int analogValue = analogRead(POTENTIOMETER_PIN); // read the input on analog pin

  if (analogValue > ANALOG_THRESHOLD)
    digitalWrite(RELAY_PIN, HIGH); // turn on Relay
  else
    digitalWrite(RELAY_PIN, LOW);  // turn off Relay
}