I can’t seem to get my PMSA003 sensor on my ESP32 to work for HA. I also attached a BME680, which is working flawlessly. But the PMSA003 sensor does not seem to be outputting any data. I can see the little fan spin up, but no data is being sent to home assistant.
Nothing in the logs aside from it being identified. I know other users had issues with the high/low states of the “Set” and “Reset” pins. Having one of them in the wrong state essentially puts the PMSA003 sensor in sleep mode despite being connected.
Also attempted to setup using I2C protocol with both pins. Logs are coming back as:
[1085][E][Wire.cpp:513] requestFrom(): i2cRead returned Error 263
[E][component:113]: Component pmsa003i.sensor was marked as failed.
[I][i2c.arduino:069]: Results from i2c bus scan:
[I][i2c.arduino:071]: Found no i2c devices!
I kept it basic and used UART RX pin on the ESP, +5V to VCC, and GND to GND. No other connections among the two.
I tried every pin on the PMSA003 and have had no luck. The only other scenario is that two of the pins are missing on the connector included on the tiny board. One of those missing pins could potentially be the TX for the PMSA003 sensor. I don’t have anything to connect to the small pins on the PMSA003. Why they decided to omit the two is beyond me.
But I am suspecting this massive flaw is the reason I cannot receive any data from the PMSA003 sensor.
I know, I am a bit late to the party here, but maybe someone is still interested… I wrote that review you are referring to.
One of the main differences was that on my board, the black pin header was not on the same side as the white connector. Unfortunately, I did not take any pictures myself. It looks similar to this picture but the black pin header is below the board.
Since the pin header is not coded, the board can be inserted in two directions. I am using it like this:
I did not write down the pin numbers of the black connector, but I hope the colors on the cable are the same:
Pin PMA Connector
Signal
Wemos
1 - violet
Vcc
5V
2 - organge
GND
G
3 - white
TX
RX - GPIO 3
4 - blue
NC
5 - green
Set
D7 - GPIO 13
All others
NC
The ESPHome yaml looks like this:
esphome:
name: air-quality-sensor
friendly_name: Air Quality Sensor
esp8266:
board: d1_mini
# Enable logging
logger:
baud_rate: 0
# Enable Home Assistant API
api:
encryption:
key: "xxxxxxxxxxxxxxxxxxxx"
ota:
password: !secret ota_password
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Air-Quality-Sensor"
password: "yyyyyyyyyy"
i2c:
sda: GPIO4 # D2
scl: GPIO5 # D1
captive_portal:
mqtt:
broker: 192.168.1.xxx
#discovery: false
topic_prefix: sensor/air-quality
uart:
tx_pin: GPIO1 # TX
rx_pin: GPIO3 # RX
baud_rate: 9600
# The 3-second debounce only publishes the average (otherwise published
# every second) once the per-second readings stop (i.e. the measurement
# period ends). This makes sure the output average doesn't slip back a
# reading every measurement period.
sensor:
# PMA003
- platform: pmsx003
type: PMSX003
pm_1_0:
name: "Particulate Matter <1.0µm Concentration"
id: pms_10
accuracy_decimals: 3
filters:
- lambda: |-
if (id(warmed_up).state) {
return x;
} else {
return {};
}
- sliding_window_moving_average:
window_size: 10
send_every: 1
send_first_at: 1
- debounce: 3s
pm_2_5:
name: "Particulate Matter <2.5µm Concentration"
id: pms_25
accuracy_decimals: 3
filters:
- lambda: |-
if (id(warmed_up).state) {
return x;
} else {
return {};
}
- sliding_window_moving_average:
window_size: 10
send_every: 1
send_first_at: 1
- debounce: 3s
pm_10_0:
name: "Particulate Matter <10.0µm Concentration"
id: pms_100
accuracy_decimals: 3
filters:
- lambda: |-
if (id(warmed_up).state) {
return x;
} else {
return {};
}
- sliding_window_moving_average:
window_size: 10
send_first_at: 1
send_every: 1
- debounce: 3s
# AHT20
- platform: aht10
variant: AHT20
temperature:
name: "AHT20 Temperature"
id: aht20_temperature
humidity:
name: "AHT20 Humidity"
id: aht20_humidity
update_interval: 180s
binary_sensor:
- platform: template
name: "Warmed Up"
id: warmed_up
filters:
- delayed_on: 30s
on_press:
- delay: 10s
- switch.turn_off: measuring
switch:
- platform: gpio
name: "Measuring"
id: measuring
pin:
number: GPIO13 # D7
restore_mode: ALWAYS_OFF
on_turn_on:
- binary_sensor.template.publish:
id: warmed_up
state: ON
on_turn_off:
- binary_sensor.template.publish:
id: warmed_up
state: OFF
- platform: restart
name: "Restart"
interval:
- interval: 300s
then:
#- wait_until:
# condition:
# mqtt.connected: # Can use api.connected if using HA API instead
- switch.turn_on: measuring # Will turn itself off later
I did not create the code myself. I copied it from somewhere and adapted it.
First I only got zero values. Then I noticed that it takes a few hours before the readings start to make sense.
