1. Overview

Shipped LT-22222-L is base on LoRaWAN protocol. We also develop a open source Point to Point LoRa protocol for LT-22222-L. The source code and hex file can be found at:

Point to Point Software for LT-22222-L.

2. Features for this firmware

2.1  Overview

2.2. Configure

A's configuration:AT+GROUPMOD=0            B's configuration:AT+GROUPMOD=0

AT+TXCHS=868700000                        AT+TXCHS=869000000 

AT+RXCHS=869000000                        AT+RXCHS=868700000 

               AT+TRIG1=2,50                              AT+TRIG1=2,50

               AT+TRIG2=2,50                              AT+TRIG2=2,50

               AT+DI1TODO1=2                             AT+DI1TODO1=2

AT+DI1TORO1=2                             AT+DI1TORO1=2

            AT+DI2TODO2=2                             AT+DI2TODO2=2

AT+DI2TORO2=2                             AT+DI2TORO2=2

2.3.  Serial port display

If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 6 seconds, and the UplinkCounter of the retransmission will not increase.