KY-013 analog temperature (NTC) with ESP32

Supply 3.3-5 V Bus ANALOG Measures temperature

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
S	Analog output	D34	To an ADC1 pin (GPIO 32 to 39). On many boards the reading falls as it gets warmer
VCC	Power	3V3	Middle pin. Use 3V3 so the output stays in the ADC range
GND	Ground	GND	Marked - on the board

Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.

void setup() { Serial.begin(115200); }

void loop() {
  int mv = analogReadMilliVolts(34);  // S on GPIO 34
  Serial.println(mv);
  delay(200);
}

Joy-IT KY-013 datasheet, 10 kΩ NTC thermistor in a divider with a 10 kΩ resistor; pins S, +, -

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.