The multifunctional dust sensor module is an environmental monitoring product equipped with a variety of high-performance sensors, with functions such as temperature and humidity detection, VOC, CO2, PM2.5, etc. Communication protocol of SUCH dust sensor module is standard MODBUSRTU, with stable performance, meeting the application needs of smart home, smart agriculture and other fields.
Feature
- 5V DC power supply.
- Digital signal output (RS485/UART).
- Quick response, strong anti-interference ability.
- Highly integrated, multi-signal data acquisition.
- Strictly calibrated and tested for stable performance.
Dimension (Unit:mm)

Wiring

The figure above shows the pin definition of the dust sensor module. U5, U6, U7, and U8 are interfaces for the temperature and humidity sensor, CO2 sensor, PM2.5 sensor, and VOC sensor, respectively. The installation locations are in the four blue boxes in the figure above, where the solid line box refers to the installation on the front of the circuit board, and the dotted line box refers to the installation on the back of the circuit board. P2 and P3 are external interfaces, used for communication and host power supply, respectively. P5 is a 3PIN jumper cap interface for RS-485 long-distance communication.
Pin |
Function |
Pin1-RS485B |
R485 communication B terminal |
Pin2-RS485A |
R485 communication A terminal |
Pin3-5V |
DC power supply |
Pin4-GND |
Ground wire |
Pin5-RS485B/TX |
RS-485 communication B terminal/UART communication transmitting terminal |
Pin6-RS485A/RX |
RS-485 communication A terminal/UART communication receiving terminal |
Pin7-5V |
DC power supply |
Pin8-GND |
Ground wire |
Pin9-120Ω |
Jumper cap short-circuit Pin9, Pin10: Parallel access to 120Ω Jumper cap short-circuit Pin10, Pin11: Cancel access to 120Ω |
Pin10-RS485A |
Pin11 |