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LT Series LoRa IO controller User Manual 32 / 42
4.2 Common AT Command Sequence
4.2.1 Multi-channel ABP mode (Use with SX1301/LG308)
If device has not joined network yet:
123456
AT+FDR
123456
AT+NJM=0
ATZ
If device already joined network:
AT+NJM=0
ATZ
4.2.2 Single-channel ABP mode (Use with LG01/LG02)
123456 Enter Password to have AT access.
AT+FDR Reset Parameters to Factory Default, Keys Reserve
123456 Enter Password to have AT access.
AT+CLASS=C Set to work in CLASS C
AT+NJM=0 Set to ABP mode
AT+ADR=0 Set the Adaptive Data Rate Off
AT+DR=5 Set Data Rate
AT+TDC=60000 Set transmit interval to 60 seconds
AT+CHS=868400000 Set transmit frequency to 868.4Mhz
AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
AT+RX2DR=5 Set RX2DR to match the downlink DR from server. see below
AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa
Server portal.
ATZ Reset MCU
Note:
1. Make sure the device is set to ABP mode in the IoT Server.
2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer this
link to see what DR means.
4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct
parameters, user can check the actually downlink parameters to be used. As below.
Which shows the RX2FQ should use 868400000 and RX2DR should be 5
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