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2	2	{{toc/}}
3	3	{{/box}}
4	4
5		-= **1. Overview** =
	5	+= Overview =
6	6
7	7	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:
8	8
...	...	@@ -10,42 +10,6 @@
10	10
11	11	== ==
12	12
13		-= **2. Features for this firmware** =
	13	+= Features for this firmware: =
14	14
15		-
16		-== **2.1  Overview** ==
17		-
18		-[[image:image-20220602111219-1.png]]
19		-
20		-
21		-== **2.2. Configure** ==
22		-
23		-A's configuration:AT+GROUPMOD=0            B's configuration:AT+GROUPMOD=0
24		-
25		-AT+TXCHS=868700000                        AT+TXCHS=869000000
26		-
27		-AT+RXCHS=869000000                        AT+RXCHS=868700000
28		-
29		- AT+TRIG1=2,50                             AT+TRIG1=2,50
30		-
31		- AT+TRIG2=2,50                           AT+TRIG2=2,50
32		-
33		- AT+DI1TODO1=2                            AT+DI1TODO1=2
34		-
35		-AT+DI1TORO1=2                            AT+DI1TORO1=2
36		-
37		- AT+DI2TODO2=2 AT+DI2TODO2=2
38		-
39		-AT+DI2TORO2=2                          AT+DI2TORO2=2
40		-
41		-
42		-== **2.3.  Serial port display** ==
43		-
44		-[[image:image-20220602111219-2.png]]
45		-
46		-
47		-[[image:image-20220602111219-3.png]]
48		-
49		-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.
50		-
51	51