HM3301 Grove PM 2.5 displays static number

I ran the example code included with the library “Seeed_HM330X.h” right out of the box.

The output is this:

Serial start
0
FF 0 0 0 2
0 2 0 2 0
2 0 2 0 2
0 0 0 0 0
0 0 0 0 0
0 0

sensor num: 0
PM1.0 concentration(CF=1,Standard particulate matter,unit:ug/m3): 2
PM2.5 concentration(CF=1,Standard particulate matter,unit:ug/m3): 2
PM10 concentration(CF=1,Standard particulate matter,unit:ug/m3): 2
PM1.0 concentration(Atmospheric environment,unit:ug/m3): 2
PM2.5 concentration(Atmospheric environment,unit:ug/m3): 2
PM10 concentration(Atmospheric environment,unit:ug/m3): 2

The output does not change no matter what I do. Is this a nonfunctional sensor or is there something that I’m not doing right?

I have the same behavior. Checked with an external logic analyzer and its sending the values, so it isn’t a code issue.

Did you ever resolve this?

0
FF 0 0 0 2
0 3 0 3 0
2 0 3 0 3
0 0 0 0 0
0 0 0 0 0
0 0
sensor num: 0
PM1.0 concentration(CF=1,Standard particulate matter,unit:ug/m3): 2
PM2.5 concentration(CF=1,Standard particulate matter,unit:ug/m3): 3
PM10 concentration(CF=1,Standard particulate matter,unit:ug/m3): 3
PM1.0 concentration(Atmospheric environment,unit:ug/m3): 2
PM2.5 concentration(Atmospheric environment,unit:ug/m3): 3
PM10 concentration(Atmospheric environment,unit:ug/m3): 3

Hello, can you tell me the SKU of the product or the link of the product, I can help you find it

Hi, thanks… SKU: 101020613

Thank you for your reply, is the interface connected to the IIC interface of Arduino?

I applied for a new PM2.5 module for testing. The code and library are no problem. I use the Seeeduino development board and connect to PM2.5 through the IIC interface. The results of the test are as follows:
At the beginning, there are two to three sets of values that fluctuate, and then the values will stabilize and hardly change. This is normal.
I also tried to change the value and use the palm to cover the PM2.5 module. It takes a while to react. After about two to three sets of data, its value will change slightly within the range of plus or minus 3.