grove-Laser_PM2.5_Sensor-HM3301 sporadic readings

[tim-oe]

i adapted the file
https://github.com/Seeed-Studio/grove.py/blob/master/grove/grove_PM2_5_HM3301.py
and did a slight adaptation to breakout the data from the reading
https://github.com/tim-oe/WeatherWatch/tree/main/weatherwatch/sensor/aqi

the sensor is being read every 15 minutes and they seem to jump up and down.
aqi_sensor.csv

[Lesords]

i adapted the file https://github.com/Seeed-Studio/grove.py/blob/master/grove/grove_PM2_5_HM3301.py and did a slight adaptation to breakout the data from the reading https://github.com/tim-oe/WeatherWatch/tree/main/weatherwatch/sensor/aqi

the sensor is being read every 15 minutes and they seem to jump up and down. aqi_sensor.csv

@is-qian Help with this one.

[tim-oe]

i have it mounted in a vertical position, wondering if that would impact it?
https://github.com/tim-oe/WeatherWatch/blob/main/docs/img/aqi.jpg

[is-qian]

I got a Grove, and indeed noticed abnormal fluctuations in readings, which seemed to have nothing to do with installation. I will further investigate it. Thank you for your question.

[tim-oe]

thanks for looking into this, iv'e used 2 different sensors with same behavior
i get a lot of crc failures before i can get a sensor reading.
here's a graph of a weeks worth of readings, this is discarding readings over 1000k

[is-qian]

How long is your delay here? After I changed the delay of here to 1s, the crc error didn't appear again when it was powered on for the first time. Strangely, I didn't encounter reading jitter after that.