PMSA003A Dust Sensor - Revision history

Leo at 07:13, 17 February 2022

2022-02-17T07:13:04Z

← Older revision		Revision as of 07:13, 17 February 2022
Line 8:		Line 8:
	The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.		The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.

	The sensor sends data measurements in binary form over a serial connection. By default, when the sensor is enabled (with the SET pin high), it will begin transmitting readings via the Tx line at 9600 baud.		The sensor sends data measurements in binary form over a serial connection. By default, when the sensor is powered on and enabled (with the SET pin high), it will begin transmitting readings via the Tx line at 9600 baud. You can set the sensor into a passive mode where it will only report values when commanded by sending a serial command to it (see serial section below).
	[[File:PMSA003A Pinout.jpg\|alt=PMSA003A Pinout\|thumb\|266x266px\|PMSA003A Pinout]]		[[File:PMSA003A Pinout.jpg\|alt=PMSA003A Pinout\|thumb\|266x266px\|PMSA003A Pinout]]

Leo at 07:08, 17 February 2022

2022-02-17T07:08:31Z

← Older revision		Revision as of 07:08, 17 February 2022
Line 36:		Line 36:
	\|5		\|5
	\|Reset		\|Reset
	\|Module reset signal / TTL level @ 3.3V (reset when high, you can leave it ~~not connected~~)		\|Module reset signal / TTL level @ 3.3V (reset when high, you can leave it disconnected)
	\|-		\|-
	\|6		\|6
Line 44:		Line 44:
	\|7		\|7
	\|RX		\|RX
	\|Serial receiver pin / TTL level @ 3.3V ~~(not really useful since there're only 2 commands you can send)~~		\|Serial receiver pin / TTL level @ 3.3V
	\|-		\|-
	\|8		\|8
Line 89:		Line 89:

	=== Tasmota using a ESP32 ===		=== Tasmota using a ESP32 ===
	Tasmota has support the PMS5003 family of sensors and should be compatible with the PMSA003A sensor in addition to the PMS7003 and PMS1003. The Tasmota driver also supports sending commands to the PMS sensor ~~in order to control~~ the ~~sensor's power state~~, allowing the sensor to ~~be in a sleep mode when not actively in use. If you don't mind leaving the PMS sensor constantly running, can leave the PMS Tx pin unconnected~~.		Tasmota has support the PMS5003 family of sensors and should be compatible with the PMSA003A sensor in addition to the PMS7003 and PMS1003. The Tasmota driver also supports sending commands to the PMS sensor if the TX pin is connected and configured, allowing Tasmota to suspend the sensor and only poll for values periodically to lengthen its service life.

	~~After setting up Tasmota on a ESP32 dev board, connect~~ the PMS sensor to the ESP32 with the following pinout:		Connect the PMS sensor to the ESP32 with the following pinout:
	{\| class="wikitable"		{\| class="wikitable"
	!Function		!Function
Line 119:		Line 119:
	Once the pins are set, you should see Tasmota report the sensor values either via MQTT or from the web interface.		Once the pins are set, you should see Tasmota report the sensor values either via MQTT or from the web interface.

	== ~~Understanding the serial~~ data ==		If you wish to poll the unit periodically and have the sensor be powered down, run the command <code>sensor18 N</code> where N is the desired polling interval in seconds and between 60 - 65535. Any values between 0 and 59 will result in the sensor being polled continuously.

			== Serial data interface ==
			Serial interface is at 9600 baud. No check bit. One stop bit.

			=== Reading values ===
	The data sheet outlines what a data packet looks like. In summary, the structure of a payload is:		The data sheet outlines what a data packet looks like. In summary, the structure of a payload is:
	{\| class="wikitable"		{\| class="wikitable"
Line 137:		Line 142:
	\|Frame length=2*13+2(data+check bytes)		\|Frame length=2*13+2(data+check bytes)
	\|-		\|-
	\|PM1.0 concentration (~~μ g~~/m<sup>3</sup>)		\|PM1.0 concentration (μg/m<sup>3</sup>)
	\|4		\|4
	\|2 bytes		\|2 bytes
	\|CF=1，standard particle		\|CF=1，standard particle
	\|-		\|-
	\|PM2.5 concentration (~~μ g~~/m<sup>3</sup>)		\|PM2.5 concentration (μg/m<sup>3</sup>)
	\|6		\|6
	\|2 bytes		\|2 bytes
	\|CF=1，standard particle		\|CF=1，standard particle
	\|-		\|-
	\|PM10 concentration (~~μ g~~/m<sup>3</sup>)		\|PM10 concentration (μg/m<sup>3</sup>)
	\|8		\|8
	\|2 bytes		\|2 bytes
	\|CF=1，standard particle		\|CF=1，standard particle
	\|-		\|-
	\|PM1.0 concentration (~~μ g~~/m<sup>3</sup>)		\|PM1.0 concentration (μg/m<sup>3</sup>)
	\|10		\|10
	\|2 bytes		\|2 bytes
	\|under atmospheric environment		\|under atmospheric environment
	\|-		\|-
	\|PM2.5 concentration (~~μ g~~/m<sup>3</sup>)		\|PM2.5 concentration (μg/m<sup>3</sup>)
	\|12		\|12
	\|2 bytes		\|2 bytes
	\|under atmospheric environment		\|under atmospheric environment
	\|-		\|-
	\|PM10 concentration (~~μ g~~/m<sup>3</sup>)		\|PM10 concentration (μg/m<sup>3</sup>)
	\|14		\|14
	\|2 bytes		\|2 bytes
Line 209:		Line 214:
	The module seems to print 'x's when no data is available or when it's not ready. So long as you are reading for the 'BM' header, the next 30 bytes should be data.		The module seems to print 'x's when no data is available or when it's not ready. So long as you are reading for the 'BM' header, the next 30 bytes should be data.

			=== Sending commands ===
			The sensor supports 3 commands (read passive, change mode, set sleep mode) with the set commands offering 2 possible data values. Each command is 6 bytes long consisting of a 2 byte header (0x424d), a 1 byte command, a 2 byte parameter, and a 1 byte check (sum of all bytes).

			All possible commands and parameter combinations including the appropriate check byte are listed below.
			{\| class="wikitable"
			!Command
			!Bytes
			\|-
			\|Active mode
			\|<code>0x42, 0x4D, 0xE1, 0x00, 0x01, 0x01, 0x71</code>
			\|-
			\|Passive mode
			\|<code>0x42, 0x4D, 0xE1, 0x00, 0x00, 0x01, 0x70</code>
			\|-
			\|Passive mode read
			\|<code>0x42, 0x4D, 0xE2, 0x00, 0x00, 0x01, 0x71</code>
			\|-
			\|Sleep
			\|<code>0x42, 0x4D, 0xE4, 0x00, 0x00, 0x01, 0x73</code>
			\|-
			\|Wake
			\|<code>0x42, 0x4D, 0xE4, 0x00, 0x01, 0x01, 0x74</code>
			\|}
	==See Also==		==See Also==

Line 215:		Line 243:
	*https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10		*https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10
	*https://cassiopeia.hk/laserdust/		*https://cassiopeia.hk/laserdust/
			*Tasmota driver: https://github.com/arendst/Tasmota/blob/master/tasmota/xsns_18_pms5003.ino

	{{Navbox Tinkering}}		{{Navbox Tinkering}}
	[[Category:Tinkering]]		[[Category:Tinkering]]

Leo at 22:42, 13 February 2022

2022-02-13T22:42:59Z

← Older revision		Revision as of 22:42, 13 February 2022
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	[[File:PMSA003A dust sensor.jpg\|alt=PMSA003A dust sensor\|thumb\|248x248px\|PMSA003A dust sensor]]The PMSA003A ~~dust~~ sensor can be found on Ebay for around $20 USD. Based on the datasheet, ~~it is a laser based sensor that~~ is capable of measuring particles as small as 0.3 micrometers.		[[File:PMSA003A dust sensor.jpg\|alt=PMSA003A dust sensor\|thumb\|248x248px\|PMSA003A dust sensor]]The PMSA003A is a laser scattering particulate sensor and is used to measure air quality. These modules can be found on Ebay for around $20 USD. Based on the datasheet, this module is capable of measuring particles as small as 0.3 micrometers.

	~~Related dust~~ sensors ~~in this family~~ include the PMS7003, PMS5003, and PMS1003.		The PMS family of particulate sensors include the PMS7003, PMS5003, and PMS1003. They all use the same serial protocol to send measurement data and receive commands.

			This page will be focused on the PMSA003A sensor since that is what I currently have.

	==Usage==		==Usage==
	The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.		The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.

			The sensor sends data measurements in binary form over a serial connection. By default, when the sensor is enabled (with the SET pin high), it will begin transmitting readings via the Tx line at 9600 baud.
	[[File:PMSA003A Pinout.jpg\|alt=PMSA003A Pinout\|thumb\|266x266px\|PMSA003A Pinout]]		[[File:PMSA003A Pinout.jpg\|alt=PMSA003A Pinout\|thumb\|266x266px\|PMSA003A Pinout]]

Line 80:		Line 84:
	\|7 (GPIO 4)		\|7 (GPIO 4)
	\|}		\|}
	Set <code>/dev/ttyAMA0</code> to 9600 baud with <code>stty -F /dev/ttyAMA0 9600</code>. You can then ~~read~~ the data coming in from the sensor with <code>cat /dev/ttyAMA0</code>.		Set <code>/dev/ttyAMA0</code> to 9600 baud with <code>stty -F /dev/ttyAMA0 9600</code>. You can then see the binary data coming in from the sensor with <code>cat /dev/ttyAMA0</code>. We will discuss the data format later on below.

	~~The GPIO pin can be set up with by exporting it: <code>echo 4 > /sys/class/gpio/export</code> and then setting~~ the ~~direction: <code>echo out > /sys/class/gpio/gpio4/direction</code>~~.

	To ~~get data~~, ~~toggle~~ the GPIO 4 pin on: <code>echo 1 > /sys/class/gpio/gpio4/value</code>. ~~This~~ takes a short while (30 seconds?) ~~for the fan~~ to spin up ~~and~~ the ~~measurement be read and~~ returned. Toggle off the sensor ~~again~~ with <code>echo 0 > /sys/class/gpio/gpio4/value</code>.		The enable pin can be controlled by the Pi's kernel GPIO drivers. You can interact with the GPIO 4 pin by first exporting it in Linux: <code>echo 4 > /sys/class/gpio/export</code> and then setting the direction: <code>echo out > /sys/class/gpio/gpio4/direction</code>. To enable the sensor, set the GPIO 4 pin high by enabling it: <code>echo 1 > /sys/class/gpio/gpio4/value</code>. The sensor takes takes a short while (30 seconds?) to warm up (spin up the fan, start the laser, etc.) before any valid measurements are returned. Toggle off the sensor with <code>echo 0 > /sys/class/gpio/gpio4/value</code>.

	=== Tasmota using a ESP32 ===		=== Tasmota using a ESP32 ===
Line 117:		Line 119:
	Once the pins are set, you should see Tasmota report the sensor values either via MQTT or from the web interface.		Once the pins are set, you should see Tasmota report the sensor values either via MQTT or from the web interface.

	==~~=Reading~~ the serial data===		== Understanding the serial data ==
	The data sheet outlines what a data packet looks like. In summary, the structure of a payload is:		The data sheet outlines what a data packet looks like. In summary, the structure of a payload is:
	{\| class="wikitable"		{\| class="wikitable"

Leo: tasmota and esp32

2022-02-13T22:28:30Z

tasmota and esp32

← Older revision		Revision as of 22:28, 13 February 2022
Line 1:		Line 1:
	[[File:PMSA003A dust sensor.jpg\|alt=PMSA003A dust sensor\|thumb\|248x248px\|PMSA003A dust sensor]]The PMSA003A dust sensor can be found on Ebay for around $20 USD. Based on the datasheet, it is a laser based sensor that is capable of measuring particles as small as 0.3 micrometers.		[[File:PMSA003A dust sensor.jpg\|alt=PMSA003A dust sensor\|thumb\|248x248px\|PMSA003A dust sensor]]The PMSA003A dust sensor can be found on Ebay for around $20 USD. Based on the datasheet, it is a laser based sensor that is capable of measuring particles as small as 0.3 micrometers.

	Related ~~and probably older~~ dust sensors in this family include the PMS7003, PMS5003, and PMS1003.		Related dust sensors in this family include the PMS7003, PMS5003, and PMS1003.

	==Usage==		==Usage==
Line 16:		Line 16:
	\|1		\|1
	\|Vcc		\|Vcc
	\|Pin 1 is the pin ~~one~~ closest to the corner		\|Pin 1 is the pin closest to the corner of the module
	\|-		\|-
	\|2		\|2
	\|Vcc		\|Vcc
	\|Do a continuity test to confirm the orientation. It should be the ~~one below~~ pin 1. See picture above.		\|Do a continuity test to confirm the orientation. It should be the pin in the following row. See the picture above.
	\|-		\|-
	\|3		\|3
Line 56:		Line 56:

	==Interfacing with the module==		==Interfacing with the module==

			=== Raspberry Pi ===
	As a quick test, I connected the PMSA003A to a Raspberry Pi using the following pinout:		As a quick test, I connected the PMSA003A to a Raspberry Pi using the following pinout:
	{\| class="wikitable"		{\| class="wikitable"
Line 82:		Line 84:
	The GPIO pin can be set up with by exporting it: <code>echo 4 > /sys/class/gpio/export</code> and then setting the direction: <code>echo out > /sys/class/gpio/gpio4/direction</code>.		The GPIO pin can be set up with by exporting it: <code>echo 4 > /sys/class/gpio/export</code> and then setting the direction: <code>echo out > /sys/class/gpio/gpio4/direction</code>.

	To get data, toggle the GPIO 4 pin on: <code>echo 1 > /sys/class/gpio/gpio4/value</code>. This takes a short while (30 seconds?) for the fan to spin up and the measurement be read and returned. Toggle off the sensor again with <code>echo 0 > /sys/class/gpio/gpio4/value</code>.~~<br />~~		To get data, toggle the GPIO 4 pin on: <code>echo 1 > /sys/class/gpio/gpio4/value</code>. This takes a short while (30 seconds?) for the fan to spin up and the measurement be read and returned. Toggle off the sensor again with <code>echo 0 > /sys/class/gpio/gpio4/value</code>.

			=== Tasmota using a ESP32 ===
			Tasmota has support the PMS5003 family of sensors and should be compatible with the PMSA003A sensor in addition to the PMS7003 and PMS1003. The Tasmota driver also supports sending commands to the PMS sensor in order to control the sensor's power state, allowing the sensor to be in a sleep mode when not actively in use. If you don't mind leaving the PMS sensor constantly running, can leave the PMS Tx pin unconnected.

			After setting up Tasmota on a ESP32 dev board, connect the PMS sensor to the ESP32 with the following pinout:
			{\| class="wikitable"
			!Function
			!PMSA003A
			!ESP32 GPIO (Tasmota Pinout)
			\|-
			\|5V
			\|1
			\|Vin
			\|-
			\|Ground
			\|2
			\|Gnd
			\|-
			\|Serial transmit
			\|9
			\|GPIO 3 (PMS5003 Rx)
			\|-
			\|Serial receive
			\|7
			\|GPIO 1 (PMS5003 Tx) ''optional''
			\|-
			\|Enable pin (set high)
			\|10
			\|3v3
			\|}
			Once the pins are set, you should see Tasmota report the sensor values either via MQTT or from the web interface.

	===Reading the serial data===		===Reading the serial data===

Leo: Removed hardware category

2021-12-30T02:21:18Z

Removed hardware category

← Older revision		Revision as of 02:21, 30 December 2021
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	{{Navbox Tinkering}}		{{Navbox Tinkering}}
	[[Category:Tinkering]]		[[Category:Tinkering]]
	~~{{Navbox Hardware}}~~
	~~[[Category:Hardware]]~~

Leo: Categories

2021-12-19T20:44:48Z

Leo at 02:05, 19 December 2021

2021-12-19T02:05:29Z

← Older revision		Revision as of 02:05, 19 December 2021
Line 20:		Line 20:
	\|2		\|2
	\|Vcc		\|Vcc
	\|Do a continuity test to confirm. ~~If pin 2 isn't directly connected to~~ pin 1~~, you might have a different pinout~~.		\|Do a continuity test to confirm the orientation. It should be the one below pin 1. See picture above.
	\|-		\|-
	\|3		\|3
Line 32:		Line 32:
	\|5		\|5
	\|Reset		\|Reset
	\|Module reset signal / TTL level @ 3.3V		\|Module reset signal / TTL level @ 3.3V (reset when high, you can leave it not connected)
	\|-		\|-
	\|6		\|6
Line 40:		Line 40:
	\|7		\|7
	\|RX		\|RX
	\|Serial receiver pin / TTL level @ 3.3V (not really useful)		\|Serial receiver pin / TTL level @ 3.3V (not really useful since there're only 2 commands you can send)
	\|-		\|-
	\|8		\|8
Line 55:		Line 55:
	\|}		\|}

	== Interfacing with the module ==		==Interfacing with the module==
	As a quick test, I connected the PMSA003A to a Raspberry Pi using the following pinout:		As a quick test, I connected the PMSA003A to a Raspberry Pi using the following pinout:
	{\| class="wikitable"		{\| class="wikitable"
Line 81:		Line 81:

	The GPIO pin can be set up with by exporting it: <code>echo 4 > /sys/class/gpio/export</code> and then setting the direction: <code>echo out > /sys/class/gpio/gpio4/direction</code>.		The GPIO pin can be set up with by exporting it: <code>echo 4 > /sys/class/gpio/export</code> and then setting the direction: <code>echo out > /sys/class/gpio/gpio4/direction</code>.
	~~<br />~~

	=== Reading the serial data ===		To get data, toggle the GPIO 4 pin on: <code>echo 1 > /sys/class/gpio/gpio4/value</code>. This takes a short while (30 seconds?) for the fan to spin up and the measurement be read and returned. Toggle off the sensor again with <code>echo 0 > /sys/class/gpio/gpio4/value</code>.<br />

			===Reading the serial data===
	The data sheet outlines what a data packet looks like. In summary, the structure of a payload is:		The data sheet outlines what a data packet looks like. In summary, the structure of a payload is:
	{\| class="wikitable"		{\| class="wikitable"
	\|+
	!Description		!Description
	!Offset		!Offset
Line 135:		Line 135:
	\|16		\|16
	\|2 bytes		\|2 bytes
	\|number of particles with diameter beyond 0.3 um in 0.1 L of air.		\|number of particles with diameter beyond 0.3 um in 0.1 L of air.
	\|-		\|-
	\|>0.5um		\|>0.5um
	\|18		\|18
	\|2 bytes		\|2 bytes
	\|number of particles with diameter beyond 0.5 um in 0.1 L of air.		\|number of particles with diameter beyond 0.5 um in 0.1 L of air.
	\|-		\|-
	\|>1.0um		\|>1.0um
Line 172:		Line 172:
	\|Check code is computed by adding all values into two bytes		\|Check code is computed by adding all values into two bytes
	\|}		\|}
	~~<br />~~		The module seems to print 'x's when no data is available or when it's not ready. So long as you are reading for the 'BM' header, the next 30 bytes should be data.

	==See Also==		==See Also==

	* Datasheet: https://www.evelta.com/content/datasheets/PMSA003%20series%20data%20manual_English_V2.5.pdf		*Datasheet: https://www.evelta.com/content/datasheets/PMSA003%20series%20data%20manual_English_V2.5.pdf

	*https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10		*https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10

Leo at 01:59, 19 December 2021

2021-12-19T01:59:48Z

Show changes

Leo at 22:23, 31 October 2021

2021-10-31T22:23:03Z

← Older revision		Revision as of 22:23, 31 October 2021
Line 3:		Line 3:
	Related and probably older dust sensors in this family include the PMS7003, PMS5003, and PMS1003.		Related and probably older dust sensors in this family include the PMS7003, PMS5003, and PMS1003.

	== Usage ==		==Usage==
	[[File:PMSA003A dust sensor.jpg\|alt=PMSA003A dust sensor\|thumb\|248x248px\|PMSA003A dust sensor]]		[[File:PMSA003A dust sensor.jpg\|alt=PMSA003A dust sensor\|thumb\|248x248px\|PMSA003A dust sensor]]
	The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.		The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.

	=== Pinout ===		===Pinout===
			The pinouts for the unit I received appears to be different from the one described on the CityOS-air docs (which only lists 8 pins). Based on what I can find, here are the pinouts for this 10-pin model:
	{\| class="wikitable"		{\| class="wikitable"
	!Pin		!Pin
	!~~Function~~		!CityOS Docs
	!Description		!Description
	\|-		\|-
	\|1		\|1
	\|Vcc		\|Vcc
	\|5v		\|Pin 1 is the pin one closest to the corner
	\|-		\|-
	\|2		\|2
	\|~~GND~~		\|Vcc
	\|~~Ground~~		\|Do a continuity test to confirm. If pin 2 isn't directly connected to pin 1, you might have a different pinout.
	\|-		\|-
	\|3		\|3
	\|~~SET~~		\|Gnd
	\|~~Setting pin / TTL level @ 3.3V~~		\|
	\|-		\|-
	\|4		\|4
	\|~~RXD~~		\|Gnd
	\|~~Serial receiver pin / TTL level @ 3.3V~~		\|
	\|-		\|-
	\|5		\|5
	\|~~TXD~~		\|Reset
	\|~~Serial transmission pin~~ / TTL level @ 3.3V		\|Module reset signal / TTL level @ 3.3V
	\|-		\|-
	\|6		\|6
	\|~~RESET~~		\|NC
	\|~~Module reset signal / TTL level @ 3.3V~~		\|
	\|-		\|-
	\|7		\|7
	\|NC		\|RX
	\|		\|Serial receiver pin / TTL level @ 3.3V
	\|-		\|-
	\|8		\|8
	\|NC		\|NC
	\|		\|
			\|-
			\|9
			\|TX
			\|Serial transmission pin / TTL level @ 3.3V
			\|-
			\|10
			\|Set
			\|Setting pin / TTL level @ 3.3V
	\|}		\|}
	<br />		<br />

	== See Also ==		==See Also==

	* https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10		*https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10
	* https://cassiopeia.hk/laserdust/		*https://cassiopeia.hk/laserdust/

	<br />		<br />

Leo: Created page with "The PMSA003A dust sensor can be found on Ebay for around $20 USD. Based on the datasheet, it is a laser based sensor that is capable of measuring particles as small as 0.3 mic..."

2021-10-03T00:45:04Z

Created page with "The PMSA003A dust sensor can be found on Ebay for around $20 USD. Based on the datasheet, it is a laser based sensor that is capable of measuring particles as small as 0.3 mic..."

New page

The PMSA003A dust sensor can be found on Ebay for around $20 USD. Based on the datasheet, it is a laser based sensor that is capable of measuring particles as small as 0.3 micrometers.

Related and probably older dust sensors in this family include the PMS7003, PMS5003, and PMS1003.

== Usage ==
[[File:PMSA003A dust sensor.jpg|alt=PMSA003A dust sensor|thumb|248x248px|PMSA003A dust sensor]]
The PMSA003A uses a 1.27mm 10 pin header. This header is smaller than the usual DIP header (those are 2.54mm). Be aware that some sellers do not sell the sensor with an adapter board or the female header which makes using this module incredibly hard to do if you don't have this header.

=== Pinout ===
{| class="wikitable"
!Pin
!Function
!Description
|-
|1
|Vcc
|5v
|-
|2
|GND
|Ground
|-
|3
|SET
|Setting pin / TTL level @ 3.3V
|-
|4
|RXD
|Serial receiver pin / TTL level @ 3.3V
|-
|5
|TXD
|Serial transmission pin / TTL level @ 3.3V
|-
|6
|RESET
|Module reset signal / TTL level @ 3.3V
|-
|7
|NC
|
|-
|8
|NC
|
|}
<br />

== See Also ==

* https://cityos-air.readme.io/docs/pms1003-digital-laser-dust-sensor-pm25-and-pm10
* https://cassiopeia.hk/laserdust/

<br />

← Older revision		Revision as of 20:44, 19 December 2021
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	*https://cassiopeia.hk/laserdust/		*https://cassiopeia.hk/laserdust/

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