USER MANUAL. Laser Particle Sensor Module PM fan series. Wuhan Cubic Optoelectronics Co.,Ltd. Ver.:

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1 USER MANUAL Laser Particle Sensor Module PM fan series ADD:Fenghuang No. 3 Road, Fenghuang Industrial Park, Eastlake Hi-tech Development Zone, Wuhan , China TEL: FAX: Ver.: Wuhan Cubic Optoelectronics Co.,Ltd info@gassensor.com.cn

2 1. Brief introduction PM2007 is one type of laser particle sensor module, which can measure the quantity of different particle size in indoor air and it can be converted to μg/m 3 according to the mathematical algorithm and output μg/m 3 directly. 2. Main features Smallest size of available measurement : 0.3μm Three types of optional signal output: UART-TTL(default); PWM (default); I 2 C (customized) Four types of optional measuring mode: single/continuous/timing/dynamic As excellent replacement of optimal dust sensor with level output 3. Application Air purifier; Air quality monitoring instrument; Fresh air system; Air conditioning system Consumer electronics relevant products. 4. Principle of particle measurement When sampling particles pass through light beam (laser), there will be light scattering phenomenon. And it will be converted into the electrical signal (pulse). The bigger particles will obtain stronger pulse single (peak value). Through peak value and pulse value can calculate quantity concentration of particles in each size. That is real-time data. 5. Specification Measurement range PM2.5/PM10 (μg/m3) (0.3μm to 10μm) Accuracy Respond time Working temperature Stable storage temperature Working humidity ±15% reading or ±15μg/m3 (choose bigger one) (@20 ) 6 seconds C C 0-95% RH non-condensing UART-TTL (0-3.3V interface) (default) Signal outputs (option ) Data bit: 8; Stop bit: 1; Check bit: null; Baud rate: 9600bps PWM (5.0V interface, 50% duty cycle corresponding 500μg/m3 (default) I 2 C(0-3.3V interface) (customized) 1

3 6. Dimension 6.1 Schematic diagram 6.2 I/O definitions 2

4 J4 CN1 No. Item Description No. Item Description V Power output (+3.3V/100mA) 1 GND Power input(ground terminal) 2 5V Power input (5V) 2 TX/P2 UART-TX output / PWM output 3 SCL I 2 C Clock (Reserved) 3 +5V Power input (5V) 4 SDA I 2 C Data (Reserved) 4 P1 PWM output 5 TEST For testing 5 RX UART-RX input 6 TX UART-TX output (0-3.3V) 7 RX UART-RX input (0-3.3V) 8 GND Power input(ground terminal) 3

5 7. Temperature influence curve Particle measurement accuracy: ±15% reading or ±15μg/m3 (choose bigger one) ) Temperature influence coefficient: 0.5%/ or 0.5μg/m³/ (choose bigger one) 8. User attention PM2007 laser particle sensor module is for household electronics products, not suitable to medical, mining equipment etc. application; PM2007 adopts no static adsorption material like metal plate etc. Please do not use it in bad dusty environment. And please turn off sampling inlet when not working; When install PM2007 sensor module in your system or equipment, please make sure of unobstructed air-inlet and air-outlet. And there is no huge airflow faced to air-inlet and air-outlet. 9. After-sales services and consultancy TEL: ADD:Fenghuang No.3 Road,Fenghuang Industrial Park, Eastlake Hi-tech Development Zone, Wuhan , China FAX:

6 UART Communication Protocol (V0.01) 1 General Statement 1.The Data in this agreement are all hexadecimal data Such as "46 for decimal [70]" 2.[xx] for single-byte data (unsigned, 0-255);high byte of Double byte data is in the front, the low byte in the back 2 Communication Format 2.1 RS232 Protocol Format Sending format: Start Length Command Data 1 Date n. Check Sum HEAD LEN CMD DATA1 DATAn CS 11H XXH XXH XXH XXH XXH Protocol format details description: Protocol format Description Start Length Command Data Check sum Command sending fixed [11H], the module respond fixed [16H] Frame bytes length = data length +1 (including CMD+DATA) Command Data of writing or reading, unfixed length Cumulative sum of data = 256- (HEAD+LEN+CMD+DATA) 3 Function 3.1 RS232 Protocol Function Sheet Item No. Function description Command 1 Open/close particle measurement 0x0C 2 Read particle measurement result 0x0B 3 Set-up and read particle measurement time 0x0D 4 Set-up and read timing measurement mode 0x05 5 Set-up and read dynamic working mode 0x05 5

7 4. RS232 Protocol Detailed Description Open/ close particle measurement Send: C DF1 1E C2 Response: C DF1 CS Function: Open/ close particle measurement Information: 1 When send the command, DF1=2 open measuring; DF1=1 close measuring; 2 When receive the command, DF1=2 open measuring; DF1=1 close measuring; 3 When the sensor receives the command of measuring open, it will start default continuous testing mode. And if, Send: C 02 1E C0 Respond: C 02 DA //open particle measurement // the sensor module is under particle measurement open status Send: C 01 1E C1 Respond: C 01 DB //open particle measurement // the sensor module is under particle measurement close status Read particle measuring results Send: B 01 E1 Response: B DF1- DF4 DF5- DF8 DF9- DF12 DF13 DF14 DF15 DF16 [CS] Function:Read particle measuring results (ug/m3) Statement: PM2.5 measuring data = DF1*256^3 + DF2*256^2 + DF3*256^1 + DF4 PM10 measuring data = DF5*256^3 + DF6*256^2 + DF7*256^1 + DF8 Data bit: B C EC D PM 2.5 PM 10 Reservation Reservation DF13: working condition alarm of the sensor module Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit0 Alarm Definition 1: low working temperature 1: high working temperature 1: low revolving speed 1: high revolving speed DF15: calibrated status alarm of the sensor module (reserved) 6

8 Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit0 Alarm Definition DF16: reserved 1: uncalibrated status on high temperatue point 1:uncalibrated stauts on low temperature point 1: uncalibrated status on normal temperatue point Set-up and read particle measuring time Send: D DF1 DF2 [CS] // set-up particle measuring time Send: D E1 // read particle measuring time Respond: D DF1 DF2 [CS] Function:to read particle measuring time Description: 1. Particle measuring time = DF1*256+DF2, unit is second. Minimum measuring time is 36 seconds. Factory default set-up time is 36 seconds. Available time range for set-up is seconds. 2. When measuring time is > 65531, it means under continuous measuring mode. It will not stop measuring until sending stop command. Send: D BB Respond: D B6 Send: D FF FF E1 Respond: D FF FF DC Send: D E1 Respond: D FF FF DC // set up single measuring mode; measuring time is 36 seconds // measuring time set-up successfully // set up continuous measuring mode // measuring time set-up successfully // read particle measuring time // read measuring time successfully Set-up timing measuring mode Send: DF1 DF2 [CS] // set up particle measuring mode Send: E9 // read particle measuring mode Respond: DF1 DF2 [CS] Function: to read particle measuring time Description: 1 Particle measuring mode value X = DF1*256+DF2, the unit is second; 2 When X >=180, it means under timing measuring mode. Measurement timing cycle is X seconds. The sensor module will start measurement one time every X seconds. And measuring time is 36 seconds. 7

9 3 Set-up range of X data is *18. It means that, the shortest timing cycle is 3 minutes; and longest one is 18 hours. Send: E0 // Set up as timing measuring mode, and timing cycle is 517seconds. Respond: DB // Set up successfully Set-up dynamic measuring mode Send: DF1 [CS] // Set up dynamic particle measuring mode Send: E8 // Read dynamic particle measuring mode Respond: DF1 [CS] Function:Read/set up particle dynamic measuring mode Description: 1 Particle dynamic measuring mode data DF1; 2 DF1=0 means, closing dynamic measuring mode. DF1=1 means, opening dynamic measuring mode. Analysis of dynamic mode: 1 When open dynamic mode, there will be the first single measurement for completed 36 seconds; 2 After the first single measurement, it will open measurement each minute. And if the measurement data of initial 6 seconds is 12% less than data from the first completed 36 seconds, then the sensor will be stopped. And, latest measurement data will keep the first 36 seconds result. Otherwise, the sensor will go ahead for the second completed 36 seconds measurement and update the latest measurement data accordingly. Send: E6 Respond: E1 Send: E7 Respond: E2 //Set up open dynamic measurement mode // Set up successfully // Set up close dynamic measurement mode //Set up successfully PM2007 sensor module supports 4 types of working mode (single measuring mode + continuous measuring mode + timing measuring mode + dynamic measuring mode). Factory default one is continuous measuring mode. It can be switched among these 4 types of modes by commands as below: 1) Send: D BB // single measuring mode; measuring time is 36 seconds 2) Send: D FF FF E1 // continuous measuring mode 3) Send: E0 // timing measuring mode; default timing cycle is 517 seconds 4) Send: E6 // dynamic measuring mode 8