www.dragino.com 
LSN50 LoRa Sensor Node User Manual    38 / 60 
AT+PORT    : Application Port  
AT+CHS    : Get or Set Frequency (Unit: Hz) for Single Channel Mode 
 AT+CHE    : Get or Set eight channels mode, Only for US915, AU915, CN470 
 
3.2  Common AT Command Sequence 
3.2.1  Multi-channel ABP mode (Use with SX1301/LG308) 
If device has not joined network via OTAA:  
AT+FDR 
AT+NJM=0 
ATZ 
 
If device already joined network:  
AT+NJM=0 
ATZ 
 
3.2.2  Single-channel ABP mode (Use with LG01/LG02) 
 
See Sect 6.7