Can't read HM-3301 values with grove.i2c

Products & Technology Grove
11

Hi there~



For hardware, you can connect the vcc to 3.3v, gnd to gnd, scl to scl and sda to sda as well.



For software, Please follow below instructions to read the data.


  1. Enable I2C through sudo raspi-config


  2. Set I2C frequency as 20khz, by adding the content : dtparam=i2c_arm_baudrate=20000 @ end of config.txt.

</s>sudo vim /boot/config.txt<e>

  1. Install dependienies
    </s>pip install smbus2<e>

  2. Run the python code

</s>cd ~ wget https://raw.githubusercontent.com/Seeed-Studio/grove.py/master/grove/grove_PM2_5_HM3301.py python grove_PM2_5_HM3301.py<e>

  1. Here is the output. thanks.

[code]
PM1.0 Standard particulate matter concentration Unit:ug/m3 = 36
PM2.5 Standard particulate matter concentration Unit:ug/m3 = 48
PM10 Standard particulate matter concentration Unit:ug/m3 = 55
PM1.0 Atmospheric environment concentration ,unit:ug/m3 = 28
PM2.5 Atmospheric environment concentration ,unit:ug/m3 = 41
PM10 Atmospheric environment concentration ,unit:ug/m3 = 51

PM1.0 Standard particulate matter concentration Unit:ug/m3 = 36
PM2.5 Standard particulate matter concentration Unit:ug/m3 = 48
PM10 Standard particulate matter concentration Unit:ug/m3 = 55
PM1.0 Atmospheric environment concentration ,unit:ug/m3 = 28
PM2.5 Atmospheric environment concentration ,unit:ug/m3 = 41
PM10 Atmospheric environment concentration ,unit:ug/m3 = 51

PM1.0 Standard particulate matter concentration Unit:ug/m3 = 36
PM2.5 Standard particulate matter concentration Unit:ug/m3 = 48
PM10 Standard particulate matter concentration Unit:ug/m3 = 55
PM1.0 Atmospheric environment concentration ,unit:ug/m3 = 28
PM2.5 Atmospheric environment concentration ,unit:ug/m3 = 41
PM10 Atmospheric environment concentration ,unit:ug/m3 = 51

PM1.0 Standard particulate matter concentration Unit:ug/m3 = 36
PM2.5 Standard particulate matter concentration Unit:ug/m3 = 48
PM10 Standard particulate matter concentration Unit:ug/m3 = 55
PM1.0 Atmospheric environment concentration ,unit:ug/m3 = 28
PM2.5 Atmospheric environment concentration ,unit:ug/m3 = 41
PM10 Atmospheric environment concentration ,unit:ug/m3 = 51[/code]