Honeywell sensors

Warning

This sensors are 3.3V devices. They require 5V power to operate the laser and fan. However, the I/O pins are not 5V tolerant and the sensor will be damaged by 5V logic.

sensordatasheet

Sensor	`--sensor-model`	PM1	PM2.5	PM4	PM10
HPMA115S0	HPMA115S0
HPMA115C0	HPMA115C0

Sensor	Datasheet	Dimensions	Connector
HPMA115S0	en	43x36x24 mm³	8 pin
HPMA115C0	en	44X36X12 mm³	10 pin

Connector

8 pin10 pin

8 pin Molex 1.25mm "PicoBlade" 51021 compatible, found online as 1.25mm JST.

Pin	Name	Voltage	Function
1	VOUT	3.3V	power output: max 100 mA
2	VCC	5V±0.2V	power input: max 600 mA, ripple < 20 mV
3/4	NC		not connected
5	RES		reserved for future use
6	TX	3.3V TTL	serial port
7	RX	3.3V TTL	serial port
8	GND	0V

5x2 1.27mm female header: Samtec SFSD-05-28-H-5.00-SR (cable assembly) or SFM-105-02-H-D (surface mount).

Pin	Name	Voltage	Function
1	VOUT	5V	power output: max 300 mA
2	VCC	5V±0.2V	power input: max 600 mA, ripple < 20 mV
3/4	GND	0V
5	RES		reserved for future use
6	NC		not connected
7	RX	3.3V TTL	serial port
8	NC		not connected
9	TX	3.3V TTL	serial port
10	SET		reserved for future use

Protocol

Serial protocol is UART 9600 8N1 3.3V TTL.

commandsmessageHPMA115S0HPMA115C0

All the Honeywell PM sensors can be fully controlled with serial commands:

Command	Description	`message`
`active_mode`	continuous operation	`68 01 40 57`
`passive_mode`	single-shot operation	`68 01 20 77`
`passive_read`	trigger single-shot measurement	`68 01 04 93`
`sleep`	sleep mode	`68 01 02 95`
`wake`	wake up from sleep mode	`68 01 01 96`

Messages containing measurements consist of unsigned short integers. The last bit of the message should contain sum(message[3:-1])%0x100.

`message`	HPMA115S0	HPMA115C0
	8 bits (32b on active mode)	16 bits (32b on active mode)
header	3 bits	3 bits
	`40 05 04`	`40 05 04`
body	4 bits	12 bits
	2 values	4 values, 2 reserved
checksum	1 bit	1 bit

The message body (message[3:7]) contains 2 values:

pm25, pm10: PM2.5, PM10 [μg/m³]

The message body (message[3:7]) contains 4 values:

pm01, pm25, pm04, pm10: PM1.0, PM2.5, PM4.0 PM10 [μg/m³]

HPMA115S0

infoserialcsvhexdump

About the HPMA115S0 sensor (-m HPMA115S0)

pms -m HPMA115S0 info

Honeywell HPMA115S0 sensor observations

time                                    measurement time [seconds since epoch]
pm25, pm10                              PM2.5, PM10 [μg/m3]

String formats: pm (default), csv and header

Read 10 samples (-n 10), one sample every 10 seconds (-i 10)

pms -m HPMA115S0 -n 10 -i 10 serial

Print on CSV format (-f csv)

pms -m HPMA115S0 -n 10 -i 10 serial -f csv

Print on hexdump format (-f hexdump)

pms -m HPMA115S0 -n 10 -i 10 serial -f hexdump

HPMA115C0

infoserialcsvhexdump

About the HPMA115S0 sensor (-m HPMA115C0)

pms -m HPMA115C0 info

Honeywell HPMA115C0 sensor observations

time                                    measurement time [seconds since epoch]
pm01, pm25, pm04, pm10                  PM1.0, PM2.5, PM4.0 PM10 [μg/m3]

String formats: pm (default), csv and header

Read 10 samples (-n 10), one sample every 10 seconds (-i 10)

pms -m HPMA115C0 -n 10 -i 10 serial

2021-09-24 15:46:40: PM1 4.0, PM2.5 7.0, PM4 9.0, PM10 23.0 μg/m3
2021-09-24 15:46:50: PM1 3.0, PM2.5 4.0, PM4 4.0, PM10 4.0 μg/m3
2021-09-24 15:47:00: PM1 4.0, PM2.5 6.0, PM4 6.0, PM10 7.0 μg/m3
2021-09-24 15:47:10: PM1 5.0, PM2.5 6.0, PM4 6.0, PM10 7.0 μg/m3
2021-09-24 15:47:20: PM1 4.0, PM2.5 5.0, PM4 5.0, PM10 5.0 μg/m3
2021-09-24 15:47:30: PM1 5.0, PM2.5 6.0, PM4 6.0, PM10 8.0 μg/m3
2021-09-24 15:48:20: PM1 5.0, PM2.5 7.0, PM4 7.0, PM10 8.0 μg/m3
2021-09-24 15:48:30: PM1 5.0, PM2.5 7.0, PM4 7.0, PM10 8.0 μg/m3
2021-09-24 15:48:40: PM1 4.0, PM2.5 6.0, PM4 6.0, PM10 7.0 μg/m3
2021-09-24 15:48:50: PM1 4.0, PM2.5 6.0, PM4 7.0, PM10 8.0 μg/m3

Print on CSV format (-f csv)

pms -m HPMA115C0 -n 10 -i 10 serial -f csv

time, pm01, pm25, pm04, pm10
1632491200, 4.0, 7.0, 9.0, 23.0
1632491210, 3.0, 4.0, 4.0, 4.0
1632491220, 4.0, 6.0, 6.0, 7.0
1632491230, 5.0, 6.0, 6.0, 7.0
1632491240, 4.0, 5.0, 5.0, 5.0
1632491250, 5.0, 6.0, 6.0, 8.0
1632491300, 5.0, 7.0, 7.0, 8.0
1632491310, 5.0, 7.0, 7.0, 8.0
1632491320, 4.0, 6.0, 6.0, 7.0
1632491330, 4.0, 6.0, 7.0, 8.0

Print on hexdump format (-f hexdump)

pms -m HPMA115C0 -n 10 -i 10 serial -f hexdump

00000000: 40 0d 04 00 04 00 07 00 09 00 17 00 00 00 00 84  @...............
00000010: 40 0d 04 00 03 00 04 00 04 00 04 00 00 00 00 a0  @...............
00000020: 40 0d 04 00 04 00 06 00 06 00 07 00 00 00 00 98  @...............
00000030: 40 0d 04 00 05 00 06 00 06 00 07 00 00 00 00 97  @...............
00000040: 40 0d 04 00 04 00 05 00 05 00 05 00 00 00 00 9c  @...............
00000050: 40 0d 04 00 05 00 06 00 06 00 08 00 00 00 00 96  @...............
00000060: 40 0d 04 00 05 00 07 00 07 00 08 00 00 00 00 94  @...............
00000070: 40 0d 04 00 05 00 07 00 07 00 08 00 00 00 00 94  @...............
00000080: 40 0d 04 00 04 00 06 00 06 00 07 00 00 00 00 98  @...............
00000090: 40 0d 04 00 04 00 06 00 07 00 08 00 00 00 00 96  @...............