//Potentiometer is connected to GPIO 34 (Analog ADC1_CH6)
const int potPin = 34;
const int ldrPin = 39;
float potValue = 0;
int ldrValue = 0;
hw_timer_t *My_timer = NULL;

void IRAM_ATTR onTimer() {

  Serial.printf("0.00, 3.30, %d, %.2f\n", ldrValue, potValue);

}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  My_timer = timerBegin(0, 80, true);
  timerAttachInterrupt(My_timer, &onTimer, true);
  timerAlarmWrite(My_timer, 10000, true);
  timerAlarmEnable(My_timer);
}

void loop() {
  potValue = analogRead(potPin);
  ldrValue = analogRead(ldrPin);
}