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HR202 Hygristor Humidity Sensor Module
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Price: US$1.15   Submit a wholesale Inquiry

1 detect the humidity of environment
2 adjustable sensitivity (blue digital chart potentiometer adjustment)
4 working voltage 3.3V-5V
5 output forms: analog voltage output; digital output (0 and 1)
6 provided with fixing bolt holes, easy to install
7 PCB size: 3cm * 1.6cm
8 the power indicator light (red) and digital output switch indicating lamp (green)
9 comparator LM393 chip, stable work

Instructions for use
1 humidity sensitive resistor module is most sensitive to the environment humidity, generally used to detect the humidity of environment.
2 module in the environmental humidity is not up to the preset threshold, DO port output high level, when the environment humidity exceeds the preset threshold, the D0 output module
3 small board digital output D0 can be directly connected with the MCU, the MCU to detect high level, thereby detecting the humidity of the environment change
4 small board digital output DO can directly drive the relay module, which can be composed of a humidity control switch
5 small board analog output can be connected to AO and AD module, through AD conversion, can obtain more accurate numerical environment humidity

Test instructions
51 development board and the humidity sensitive resistor module test
Wiring instructions
Module VCC development board VCC
Module GND development board GND
Connect the VCC and GND, module power indicator exhibit of lanterns lit
The module is placed on the desktop, the adjusting plate blue potentiometer, until the board switch indicator light, and then a slight callback, let the switch lights out, think of ways to make the environment humidity increases, the module switch indicating lamp will be bright. If the environmental humidity is reduced, switch indicator light will back off of the state. This phenomenon indicates that, the environmental humidity can trigger module, so that the switch indicator lights.

The data attached 51 program, high level to detect humidity sensitive resistor module of digital interface D0
Module VCC development board VCC
Module GND development board GND
Module D0 development board P0.1
Microcontroller: STC89C52
The serial port to send data baud rate: 9600
Phenomenon: the environmental humidity exceeds a set threshold, serial send 01, at the same time switch indicator light
The humidity of the environment does not exceed a set threshold, the serial port does not send data, at the same time switch indicator is off

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