Template: MQ-135 Gas Sensor Arduino Guide
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Revision as of 08:24, 8 October 2021 by Waveshare-eng11 (talk | contribs) (Created page with "The examples provided are based on the Arduino UNO, if you need to use other Arduino boards, please check if the board is compatible with the UNO. ==Hardware connection== Fi...")
The examples provided are based on the Arduino UNO, if you need to use other Arduino boards, please check if the board is compatible with the UNO.
Hardware connection
MQ135 | Arduino | Description |
---|---|---|
VCC | 5V | Power input |
GND | GND | Ground |
AOUT | A0 | Analog data output |
DOUT | D2 | Digital data output |
Examples
- Please download and install Arduino IDE to your PC.
- Download the demo codes, unzip and find the Arduino examples
- Open the Gas_Sensor.ino file by the Arduino IDE
- Build and upload the codes to the UNO board
- After uploading, you can open the Serial Monitor of IDE and check the data
Expected result
- The sensor needs to preheat for about a minute to heat the internal sensitive materials of the sensor.
- Out the sensor inside the device containing sensitive gas, and the indicator on the module lights up. The indicator goes off when the sensor is removed from the device.