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9535 – DHT11 Temperature-Humidity Sensor/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

Calibrated digital temperature and humidity sensor (DHT11) with a single-wire interface. Suitable for ambient monitoring; includes setup guides for Raspberry Pi Pico, STM32, and Arduino UNO.

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Technical overview

  • Sensor: DHT11
  • Operating voltage: 3.3 V to 5.5 V
  • Temperature resolution: 1 °C; accuracy: ±2 °C; range: 0 °C to 50 °C
  • Humidity resolution: 1 %RH; accuracy: ±5 %RH (0–50 °C); range: 20 %RH to 90 %RH (at 25 °C)
  • Recommended storage: 10 °C to 40 °C, humidity ≤ 60 %RH
  • Fixed hole size: 2.0 mm
  • Pinout: DOUT (digital output), GND, VCC
  • Raspberry Pi Pico: VCC to 3.3 V, GND to ground, DOUT to GP15
  • STM32 (example based on STM32F103RB): VCC to 3.3 V, GND to ground, DOUT to PA0
  • Arduino UNO: VCC to 5 V, GND to ground, DOUT to D2

Commands and examples – verify before use:  

sudo apt-get install p7zip-full
cd ~
sudo wget https://files.waveshare.com/upload/4/4a/Temperature-Humidity-Sensor-code.7z
7z x Temperature-Humidity-Sensor-code.7z -o./Temperature-Humidity-Sensor-code
cd ~/Temperature-Humidity-Sensor-code/Pico/c/build
export PICO_SDK_PATH=../../pico-sdk
cmake ..
make -j9
cp main.uf2 /media/pi/RPI-RP2/
sudo apt upgrade thonny

Notes and version constraints

  • The STM32 examples are based on the STM32F103RBT6 and STM32H743; other STM32 boards require adjusting the hardware connection and porting the code.
  • The Arduino example is written specifically for the Arduino UNO; other boards may need modified connections.
  • Thonny must be up to date (v3.3.3 under Windows), as older versions lack Pico support.
  • The Pico SDK path may differ from the default; the export command must be adjusted accordingly.
  • The commands listed assume the specific directory structure and firmware described in the source; deviations require manual verification.

Source and revision record

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