Hello,Can someone tell me who makes the PM2.5 Laser Sensor Module?Can it be used for professional particulate measurements?Are there accuracy figures available for it? (In the spec...

Can you connect the adapter to a Serial UART with a 5 Volts level? and my TX LED indicator does not blink, it only glows faintly and steadily.

Do you know (DFROBOT moderator or support) if this product come back in stock?
Manufacturer's site BJHIKE has pretty inteesting products/sensors and interface about
air quality, can we hope some of these pop up here with English descripton?

Please post the datasheet of SKU: SEN0177.

The serial data from the dust sensor has start and stop characters 0x42 and 0x4d. are they prevented to appear within the data fields?

Hi. I am very interested in how the module works. How is the particle size determined, how their mass? Is it independent of the albedo of the particles? Also a picture of an open sensor would be quite interesting :)
Is the supply voltage range requirement really that narrow as specified in the specs (5V +-50mV)? That's almost laboratory grade.
Thanks.

Can I use the same code to interface the module with a raspberry pi ?

What is the accuracy of the sensor? Could you please post the sensor datasheet in order to obtain further details related to the measurement procedures?
Thank you, Anna

I hooked up the sensor to Arduino Uno and uploaded the script from the product wiki, but I am reading all zeros. I have IDE 1.6.7.
I left the RST and SET pins floating, is it causing the problem?

Hi, I'm stuggling to understand some of the data returned. When printing out the byte array to serial I get the following;

66 77 0 28 0 29 0 40 0 52 0 25 0 36 0 49 19 20 5 169 1 0 0 31 0 14 0 0 0 0 2 86

So according to the specification in the wiki "the number of particulate of diameter above 0.3um in 0.1 liters of air" is "19 20", how to interpret that? It confuses me when Data points like 1 and 2 (concentration of pm1.0 and pm2.5) are expressed cleanly (in hex as 0x1C), but these others are not.

If you could help me understand what "19 20" and "5 169" are meant to mean, that would be fantastic.

Thank you!

What is the weight of the module? It would be really helpful because I intend to mount it on a drone, thank very much.

Is it possible to only buy the adapter part? What is the name of that plug that comes from the sensor?

I tried convert the particle concentration to PM1, PM2,5 and PM10 and I got significant different values. Therefore I'm not sure if the concentrations are correctly defined in the sensor. Do you know what is the flow speed for this sensor? Concentration is given per 0.1 liters which for flow speed about 2ml/min (this is me estimation) need 1 minute to measure 0.1 liters of air. However, when I read the data every 1 sec I have for the largest bin (concentration for particle > 10um) the value such as 0 1 or 2. What does mean? If the sensor detect 1 particle per second the value for 0.1 liters must be 60 but is not. The data are averaged in 1 minute? By the way the noise is so low in compare to another sensors which detect single particles? Do you know why? some averaging?

Could you provide the refractive index and particle density which are assumed to calculate the particle mass concentration?

No - I'm using a Raspberry Pi, as I can write all the code in Ruby. Makes my life easier.

Yeah, the data has changed its length. and we'll update its wiki recently.

I was able to get values from the sensor on a Mega, but the problem is that values are constant, they do not change in time. I suppose the SET pin is to be used, but there is no instruction on how to set it = 1. Anyone succeded in this?

thank you
marco

do you have any code for this ? for example your Library is not adapted for software serial port

The sketch at the Product wiki seems to read the sensor on Serial, AND output the formatted data to the same Serial.print. Is this correct? The sketch in the Library refers to Serial1, so maybe it is really written for a Mega?

Do you have a sketch for this sensor that runs on a Uno, for example? I am having trouble getting Software.Serial to read and parse the data from the sensor. Has anyone else succeeded in this?

http://www.plantower.com is the maker of the sensor, but they don't have a data sheet there. My first impression is that this sensor is very much better device than the Shinyei, Sharp, etc.