1 GREEN LED D3 | RED LED D4 | Description
2 -------------+------------+-------------------------------------------
3 OFF | OFF | Standby Mode
4 1Hz FLASH | OFF | Upstream heartbeat frame
5 OFF | FLASH | Upstream Alarm Steam and Check angle value
6 4Hz flash synchronosly | Push button S6
7 ON | Reset to default setting
9 RED LED D5 | Description
10 -----------+--------------------------
11 ON | Connect to NB‐IOT network