Introduction

PM 2.5 sensor is a professional sensor for detecting PM2.5 and PM10. It is used for testing the air quality. It has good consistency and high accuracy,which can be accurate to a single unit of digit.

Shipping List

1 x Octopus PM2.5 PM10 Detector Sensor Module   

Hardware

Features

• Accuracy：Laser detection, stable and consistent.
• Fast Response: Less than 10 seconds’ response to the occasion change.
• Easy to Integrate：Serial port output, with a built-in fan.
• High resolution：Enable to recognise particles with diameters smaller to 0.3um.
• Working Voltage???V
• Max Working Current???00mA
• Sleep Current???mA
• Working Temperature???20-50???/li>
• Data Output Time??? second
• Serial Port Data Sending Frequency:1 time per second
• Relative Tolerance???0%
• Product Dimension???1x70x23mm

Application

• Available to be applied to PM2.5 detectors, air purifiers, filtering systems, etc..

Pins Instruction

Dimension:

Data Output

Read by PWM

Read by Serial Port

  Serial Port Protocol:96008N1.(Speed Ratio 9600, 8 bits, no parity, 1 stop bit) Serial Port Report Time: 1+0.5 second Data Frame???0 byte）：header+command+data(6 byte)+checksum+tail 0 header AA 1 command C0 2 data 1 PM2.5 lower byte 3 data 2 PM2.5 high byte 4 data 3 PM10 lower byte 5 data 4 PM10 high byte 6 data 5 0(retain) 7 data 6 0(retain) 8 checksum checksum 9 tail AB Checksum：Sum from data 1 to data 6. PM2.5 data content: PM2.5(ug/m3) = ((PM2.5 high byte x 256) + PM2.5 lower byte)/10 PM10 data content：PM10(ug/m3) = ((PM10 high byte x 256) + PM10 lower byte )/10    

Example

Arduino

Circuit Connection

Connect PM2.5 GVS to A0 on the Arduino UNO, and connect PM10 GVS to A1 on the Arduino UNO.

Code

 #define pm25Pin 14 #define pm10Pin 15 void setup() { pinMode(pm25Pin, INPUT); pinMode(pm10Pin, INPUT); Serial.begin(9600); } void loop() { Serial.print("PM2.5 = "); Serial.println(pulseIn(pm25Pin, HIGH, 1500000) / 1000 - 2); Serial.print("PM10 = "); Serial.println(pulseIn(pm10Pin, HIGH, 1500000) / 1000 - 2); } 

Micro:bit

Circuit Connection

Connect PM2.5 GVS to P15 on the micro:bit breakout board, and connect PM10 GVS to P16.

Code

For the whole code, see this link: https://makecode.microbit.org/_83oYC4DcVc5z Or you can click Downloadin the page below to download all example code.  

Other

Relative Accessary

Freaduino UNO Rev2.2 MB_EFUNO

BBC Micro:bit Board for Coding & Programming

ElecFreaks Micro:bit Breakout Board ( Octopus:bit)