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LGT-92 LoRa GPS Tracker User Manual
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2.4
Downlink Payload
Downlink Command
FPort
Code
Payload size
(bytes)
Function
TDC
(Transmit Time
Interval)
Any
01
4
Set AT+TDC
Ex: 0x0100012C (set time to 300s
(0x12C))
Exit alarm
Any
02
2
Exit Alarm Interrupt
Ex: 0x0201
RESET
Any
04
2
Reset Device
Ex: 0x04FF
Confirmed (Set
AT+CONFIRM)
Any
05
2
Example: 0x0501: AT+CFM=1
0x0500: AT+CFM=0
Set AT+CHE
Any
07
2
Total bytes: 2
Example: 0x0702: AT+CHE=2
AT+MD (Movment
Detect)
Any
A5
2 or 4
Total bytes: 2 or 4
Example: 0xA501: AT+MD=1
0xA5031904:AT+MD=3,25,04
AT+KAT (Keep Alive
Time)
Any
A9
4
Example: 0xA9000258:
Set AT+KAT=0x258=600S
The FPort no fix , if the payload=0100003C, means to control the END
Node’s TDC to 0x00003C=60(S), while type code is 01.
Example Downlink payload setting in TTN:
2.5
LED Status
1)
Power on: Green LED on for two seconds.
Event
Action
AT+LON to
control on/off
AT+MLON to
control on/off
Power On
GREEN
led on 2 seconds
N/A
N/A
Join request
BLUE
led fast blink once (200ms)
Yes
N/A
Join Success
Purple
led on 1 second
N/A
N/A
Fixing Location
GREEN
blinks 200ms per second
Yes
N/A
