9
3.3 Boot Process
When the DTU starts to work, the red, green and blue lights are on for one second, then
the red light is on. The green light flashes to indicate that the search is slightly reversed and
connected to WIFI. The red and green lights flash alternately to indicate that the server is
connected and the WIFI is searched. After the search, the green light stops flashing and
turns solid.
3.4 Indicator Light Status Description
LED
light
DTU
status
Red Blue Green
Red
+Blue+Grean
1 Power-on
Alternate Bright
(1s)
2
Upgrade procedure
Alternate Shining
(1/3s)
3
normal operation
Bright
4
ID search is not complete
Shining
5
Not ID
Bright
6
Not connected to WIFI
Bright
7
Server not connected
Shining
8
Receive server data
Shining
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