17
PM2.5: It is not possible to calibrate on the sensor side,
and you can calibrate through WS View App
when paired with GW1000 or on the console when paired
with HP2551/HP3500/HP3501, which saves the offset
value on the gateway side before sending data to
server. However if PM2.5 data is
persistently low, it can be that there is a spider net going
inside the sensor. So please clean the sensor from time to
time to see if there is any sign of spider penetration.
Note: If the battery level is lower than 4 bars, calibration
is prohibited. When the led light on the sensor is steady
for 3 seconds, it indicates that calibration is prohibited.
