Dragino LSE01, Руководство пользователя

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LSE01 LoRaWAN Soil Moisture & EC Sensor User Manual 26
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4. FAQ
4.1 How to change the LoRa Frequency Bands/Region?
You can follow the instructions for how to upgrade image .
When downloading the images, choose the required image file for download.
How to set up LSE01 to work in 8 channel mode
By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many
gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is
long and unpredictable while the end node is hopping in 72 frequencies.
You can configure the end node to work in 8 channel mode by using the AT+CHE command.
The 500kHz channels are always included for OTAA.
For example, in
US915 band, the frequency table is as below. By default, the end node will
use all channels (0~71) for OTAA Join process. After the OTAA Join, the end node will use
these all channels (0~71) to send uplink packets.
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
Channels(500KHz,4/5,Unit:MHz,CHS=0)
903 904.6 906.2 907.8 909.4 911 912.6 914.2 Channel 64-71
When you use the TTN network, the US915 frequency bands use are:
●
903.9 - SF7BW125 to SF10BW125
●
904.1 - SF7BW125 to SF10BW125
●
904.3 - SF7BW125 to SF10BW125
●
904.5 - SF7BW125 to SF10BW125
●
904.7 - SF7BW125 to SF10BW125
●
904.9 - SF7BW125 to SF10BW125
●
905.1 - SF7BW125 to SF10BW125
●
905.3 - SF7BW125 to SF10BW125
●
904.6 - SF8BW500
Because the end node is now hopping in 72 frequency, it makes it difficult for the devices to
Join the TTN network and uplink data. To solve this issue, you can access the device via the
AT commands and run:
AT+CHE=2
ATZ