Firstsensor tau tsim IoT kua qib ntsuas kev daws teeb meem, uas yog siv nrog peb A01 ultrasonic sensor.
Lub sensor ntawm manhole npog (ultrasonic kua theem saib xyuas) txais cov tshuab ultrasonic, NB-IOT kev sib txuas lus thev naus laus zis thiab 2.4G kev sib txuas lus thev naus laus zis kom paub txog lub sijhawm saib xyuas dej ntawm cov dej tshuaj ntsuam xyuas qhov dej.