User Manual

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LHT65 Temperature & Humidity sensor 34 / 40
5.2 How to change the LoRa Frequency Bands/Region?
User can follow the introduction for how to upgrade image. When download the images, choose
the required image file for download.
5.3 How to choose the right frequency band set for US915, AU915, CN470 bands?
The frequency bands US915, AU915, CN470 total has 72 frequencies. As specify in LoRaWAN
1.0.3 Regional Parameters.xlsx
The LHT65 choose CHE=2 by default(US915/AU915). If user has issue to join the LoRaWAN
network, please check if the frequency band matches the LoRaWAN network settings. If not,
properly need to use AT+CHE command to change.
User can configure the LT 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
CHE
AU915 Uplink Channels(125KHz,4/5,Unit:MHz,CHS=0)
0
ENABLE Channel 0-63
1
915.2
915.4
915.6
915.8
916
916.2
916.4
916.6
Channel 0-7
2
916.8
917
917.2
917.4
917.6
917.8
918
918.2
Channel 8-15
3
918.4
918.6
918.8
919
919.2
919.4
919.6
919.8
Channel 16-23
4
920
920.2
920.4
920.6
920.8
921
921.2
921.4
Channel 24-31
5
921.6
921.8
922
922.2
922.4
922.6
922.8
923
Channel 32-39
6
923.2
923.4
923.6
923.8
924
924.2
924.4
924.6
Channel 40-47
7
924.8
925
925.2
925.4
925.6
925.8
926
926.2
Channel 48-55
8
926.4
926.6
926.8
927
927.2
927.4
927.6
927.8
Channel 56-63
CHE
CN470 Uplink Channels(125KHz,4/5,Unit:MHz,CHS=0)
0
ENABLE Channel 80-95
1
486.3
486.5
486.7
486.9
487.1
487.3
487.5
487.7
Channel 80-87
2
487.9
488.1
488.3
488.5
488.7
488.9
489.1
489.3
Channel 88-95