Digital Temperature And Relative Humidity Sensor Module DHT-11 KY-013
Digital Temperature And Relative Humidity Sensor Module DHT-11 KY-013
Digital Temperature And Relative Humidity Sensor Module DHT-11 KY-013
Digital Temperature And Relative Humidity Sensor Module DHT-11 KY-013

Digital Temperature And Relative Humidity Sensor Module DHT-11 KY-015

Sensors
DET565
Part.No: KY-015
€3.00
In Stock
Immediate Dispatch
KY-015 DHT-11 Digital Temperature & Humidity Sensor Module — 3-pin single-bus output, 3.3–5.5V supply, measures 0–50°C and 20–90%RH. Ready to use with Arduino, ESP32, and Raspberry Pi projects.

 

The KY-015 DHT-11 is a compact, low-cost digital temperature and humidity sensor module designed for easy integration into maker and engineering projects. Using a factory-calibrated sensing element and a single-wire digital output, the KY-015 eliminates the need for ADC circuitry and delivers ready-to-read data with minimal wiring. The 3-pin module format (VCC, DATA, GND) makes it a plug-and-play choice for Arduino, ESP32, and Raspberry Pi boards operating on 3.3 V or 5 V.

Κύρια Χαρακτηριστικά / Key Features

  • Single-Bus Digital Output: Communicates over one data line → no extra components or ADC needed
  • Wide Supply Voltage: 3.3 V to 5.5 V DC → works natively with both 5 V Arduino and 3.3 V ESP32/Raspberry Pi
  • Humidity Range 20–90 %RH: ±5 %RH accuracy → suitable for indoor air-quality and climate monitoring
  • Temperature Range 0–50 °C: ±2 °C accuracy → reliable for room-temperature applications
  • 1-Unit Resolution: 1 %RH / 1 °C → sufficient for typical environmental sensing
  • Fast Response: <5 seconds → near real-time readings for automation systems
  • Full-Scale Factory Calibration: Calibration coefficients stored in sensor OTP memory → no user calibration required
  • Low Power Consumption: Suitable for battery-assisted or always-on IoT nodes

Pinout & Wiring

PinSymbolDescription
1VCC (S)Power supply 3.3–5.5 V DC
2DATASingle-wire digital data output (connect to any GPIO)
3GND (–)Ground

Wiring note: Connect VCC to your board's 3.3 V or 5 V rail, GND to ground, and DATA to any free digital GPIO pin. Use the DHT library (Arduino) or Adafruit_DHT / dht (MicroPython) — no pull-up resistor is required as the module PCB already includes it.

Compatibility

  • Arduino UNO / Nano / Mega (5 V): Direct connection to any digital pin; use DHT library.
  • ESP32 / ESP8266 (3.3 V): 3.3 V VCC, connect DATA to any GPIO; use Adafruit DHT or ESPHome.
  • Raspberry Pi (3.3 V): Connect to any GPIO; use Adafruit_CircuitPython_DHT or pigpio library.

Typical Applications

  • Indoor climate monitoring: Log temperature and humidity in homes, offices, or greenhouses to trigger HVAC or ventilation systems.
  • Weather stations: Combine with a barometric sensor for a full DIY weather logger on Arduino or Raspberry Pi.
  • Smart agriculture: Monitor soil-adjacent air humidity to automate irrigation alerts.
  • IoT data dashboards: Stream readings via ESP32/ESP8266 to MQTT brokers, Home Assistant, or cloud platforms.
  • STEM education projects: Ideal first sensor for students learning about digital protocols and environmental data acquisition.

Technical Specifications

ParameterValue
InterfaceSingle-Wire Digital (1-Wire protocol)
Supply Voltage3.3 – 5.5 V DC
Temperature Range0 – 50 °C
Temperature Accuracy±2 °C
Temperature Resolution1 °C
Humidity Range20 – 90 %RH (with 0–50 °C compensation)
Humidity Accuracy±5 %RH
Humidity Resolution1 %RH
Response Time< 5 seconds
CalibrationFactory full-scale calibration (OTP stored)
MPNKY-015

FAQ

Q: Do I need an external pull-up resistor for the data line?
A: No. The KY-015 module PCB already includes the pull-up resistor on the DATA line, unlike bare DHT-11 sensors.

Q: Can I use more than one KY-015 on the same microcontroller?
A: Yes — because the protocol is single-wire (not shared bus), connect each module's DATA pin to a separate GPIO pin and instantiate a separate DHT object per sensor in your code.

Package contents: 1 × KY-015 DHT-11 sensor module

⚠ Note: The DHT-11 is designed for indoor, non-condensing environments. Do not expose the sensor to condensation, liquids, or temperatures outside the 0–50 °C range, as this will permanently damage the sensing element.
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