说明：收发设备配置指令一致，进入透传模式以后，自动开启LoRa接收，识别到串口有数据的话，直接透传出去。若是要切换频段，需要发送"+++"退出透传模式，进入AT模式，识别用户AT指令。

低频版本：
AT
OK

AT+CADDR=10
set local address: 10
OK

AT+CTXADDR=20
set target address: 20
OK

AT+CTX=470625000,3,0,1,22,0
config radio params data(freq: 470625000, dr: 3, bw:0, cr: 1, power: 22 iqInverted: 0)
LORA_TRANSPARENT_MODE
LoRa Config(freq: 470625000, dr: 3, bw:0, cr: 1, power: 22)

hello
TXDONE



高频版本：
AT
OK

AT+CADDR=10
set local address: 10
OK

AT+CTXADDR=20
set target address: 20
OK

AT+CTX=868625000,3,0,1,22,0
config radio params data(freq: 868625000, dr: 3, bw:0, cr: 1, power: 22 iqInverted: 0)
LORA_TRANSPARENT_MODE
LoRa Config(freq: 868625000, dr: 3, bw:0, cr: 1, power: 22)

hello
TXDONE
