Data Sheet

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LGT-92 LoRa GPS Tracker User Manual 25 / 29
6.5 How to set up LGT-92 to work in 8 channel mode in US915, AU915, CN470
bands?
By default, the frequency bands US915, AU915, CN470 works in 72 frequencies. And many
gateways is 8 channel gateways, in such case, the OTAA joined time and uplink schedule is long
and unpredictable while the LGT-92 hopping in 72 frequency.
User can configure the LGT-92 to work in 8 channel models by using the AT+CHE command. For
example, in US band, the table is as below. If we run AT+CHE=2. The device will work in Channel
8-15
CHE
US915 Uplink Channels(125KHz,4/5,Unit:MHz,CHS=0)
0
ENABLE Channel 0-63
1
902.3
902.5
902.7
902.9
903.1
903.3
903.5
903.7
Channel 0-7
2
903.9
904.1
904.3
904.5
904.7
904.9
905.1
905.3
Channel 8-15
3
905.5
905.7
905.9
906.1
906.3
906.5
906.7
906.9
Channel 16-23
4
907.1
907.3
907.5
907.7
907.9
908.1
908.3
908.5
Channel 24-31
5
908.7
908.9
909.1
909.3
909.5
909.7
909.9
910.1
Channel 32-39
6
910.3
910.5
910.7
910.9
911.1
911.3
911.5
911.7
Channel 40-47
7
911.9
912.1
912.3
912.5
912.7
912.9
913.1
913.3
Channel 48-55
8
913.5
913.7
913.9
914.1
914.3
914.5
914.7
914.9
Channel 56-63
6.6 What is the pin mapping for the USB program cable?
Pin
Color
USB Pin
UART pin
ST-Link Pin
1
Red
VCC
N/A
+5V
2
White
D- (N/A)
LGT-RXD
SWDIO
3
Green
D+(N/A)
LGT-TXD
SWCLK
4
ID (N/A)
N/A
5
Black
GND
GND
GND