Output result
Mainly output as the quality and number of each particles with different size
per unit volume, the unit volume of particle number is 0.1L and the unit of
mass concentration is μ g/m³.
There are two options for digital output: passive and active. Default mode
is active after power up. In this mode sensor would send serial data to the
host automatically .The active mode is divided into two sub-modes: stable
mode and fast mode. If the concentration change is small the sensor
would run at stable mode with the real interval of 2.3s.And if the change is
big the sensor would be changed to fast mode automatically with the
interval of 200~800ms, the higher of the concentration, the shorter of the
interval.

Circuit Attentions
1) DC 5V power supply is needed because the FAN should be driven by 5V.
But the high level of data pin is 3.3V. Level conversion unit should be
used if the power of host MCU is 5V.
2) The SET and RESET pins are pulled up inside so they should not be
connected if without usage.
3) PIN7 and PIN8 should not be connected.
4) Stable data should be got at least 30 seconds after the sensor wakeup
from the sleep mode because of the fan’s performance.
Installation Attentions
1) Metal shell is connected to the GND so be careful not to let it shorted with
the other parts of circuit except GND.
2) The best way of install is making the plane of inset and outset closely to
the plane of the host. Or some shield should be placed between inset and
outset in order to prevent the air flow from inner loop.
3) The blowhole in the shell of the host should not be smaller than the inset.
4) The sensor should not be installed in the air flow way of the air cleaner or
should be shielded by some structure.
5) The sensor should be installed at least 20cm higher than the grand in
order to prevent it from blocking by the flock dust.
6) Do not break up the sensor.
Other Attentions
1) Only the consistency of all the PM sensors of PLANTOWER is promised
and ensured. And the sensor should not be checked with any third party
equipment.
2) The sensor is usually used in the common indoor environment. So some
protection must be added if using in the conditions as followed:
a) The time of concentration ≥300μ g/m³ is longer than 50% of the
whole year or concentration≥500μ g/m³ is longer than20% of the
whole year.
b) Kitchen
c) Water mist condition such as bathroom or hot spring.
d) outdoor
Appendix I：PMS7003 transport protocol-Active Mode
Default baud rate：9600bps Check bit：None Stop bit：1 bit
32 Bytes
Start character 1 0x42 (Fixed)
Start character2 0x4d (Fixed)
Frame length high
8 bits
…… Frame length=2x13+2(data+check bytes)
Frame length low 8
bits
……
Data 1 high 8 bits …… Data1 refers to PM1.0 concentration unit
μ g/m3（CF=1，standard particle）*
Data 1 low 8 bits ……
Data2 high 8 bits …… Data2 refers to PM2.5 concentration unit
μ g/m3（CF=1，standard particle）
Data2 low 8 bits ……
Data3 high 8 bits …… Data3 refers to PM10 concentration unit
μ g/m3（CF=1，standard particle）
Data3 low 8 bits ……
Data4 high 8 bits …… Data4 refers to PM1.0 concentration unit *
μ g/m3（under atmospheric environment）
Data4 low 8 bits ……
Data5 high 8 bits …… Data 5 refers to PM2.5 concentration unit
μ g/m3（under atmospheric environment）
Data5 low 8 bits ……
Data6 high 8 bits ……. Data 6 refers to concentration unit (under
atmospheric environment) μ g/m3 Data6 low 8 bits ……
Data7 high 8 bits …… Data7 indicates the number of
particles with diameter beyond 0.3 um
in 0.1 L of air. Data7 low 8 bits ……
Data8 high 8 bits …… Data 8 indicates the number of
particles with diameter beyond 0.5 um
in 0.1 L of air. Data8 low 8 bits ……
Data9 high 8 bits …… Data 9 indicates the number of
particles with diameter beyond 1.0 um
in 0.1 L of air.
Data9 low 8 bits ……
2016 product data manual of PLANTOWER
Data10 high 8 bits …… Data10 indicates the number of
particles with diameter beyond 2.5 um
in 0.1 L of air.
Data10 low 8 bits ……
Data11 high 8 bits …… Data11 indicates the number of
particles with diameter beyond 5.0 um
Data11 low 8 bits …… in 0.1 L of air.
Data12 high 8 bits …… Data12 indicates the number of
particles with diameter beyond 10 um
Data12 low 8 bits …… in 0.1 L of air.
Data13 high 8 bits …… Data13 Reserved
Data13 low 8 bits ……
Data and check
high 8 bits
…… Check code=Start character1+ Start
character2+……..+data13
Low 8 bits
Data and check
low 8 bits
……
Note: CF=1 should be used in the factory environment
.
2016 product data manual of PLANTOWER
Appendix II：PMS7003 transport protocol-Passive Mode
Default baud rate：9600bps Check bit：None Stop bit：1 bit
Host Protocol
Start Byte
1
Start Byte
2
Command Data 1 Data 2 Verify Byte
1
Verify Byte
2
0x42 0x4d CMD DATAH DATAL LRCH LRCL
1. Command Definition
CMD DATAH DATAL 
0xe2 X X Read in passive
mode
0xe1 X 00H-passive
01H-active
Change mode
0xe4 X 00H-sleep
01H-wakeup
Sleep set
2. Answer
0xe2: 32 bytes , same as appendix I
3. Verify Bytes :
Add of all the bytes except verify bytes.