Module Features

1. Adopting high-quality HR202 humidity sensor;

2. The comparator output has a clean signal, good waveform, and strong driving capability, exceeding 15mA.

3. Adjust the temperature detection threshold with a potentiometer

4. Working voltage 3.3V-5V

5. Output format: Digital switch output (0 and 1)

6. Equipped with fixed bolt holes for easy installation

7. Small PCB size: 3.2cm x 1.4cm

8. Using a wide voltage LM393 comparator

Wiring instructions (3-wire system)

1 VCC external 3.3V-5V

2 GND external GND

3 DO small board digital output interface (0 and 1)

Module usage instructions

1. The humidity sensor module is highly sensitive to environmental humidity and is generally used to detect the humidity of the surrounding environment;

2. By adjusting the potentiometer, the threshold for humidity detection (i.e. controlling the humidity value) can be changed. If it is necessary to control the environmental humidity to 60%, the module will turn on the green light and output a high level when the corresponding environmental humidity is adjusted. When the humidity is lower than this set value, the module will output a high level and the green light will not turn on;

3. The DO output terminal can be directly connected to the microcontroller to detect high and low levels, thereby detecting changes in environmental humidity;

4. The DO output terminal can directly drive the relay module of our store, which can form a humidity switch to control the relevant equipment to work in a suitable environment;

Wiring Method

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