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2	2	{{toc/}}
3	3	{{/box}}
4	4
5		-= **1. Overview** =
	5	+= Overview =
6	6
7		-(((
8	8	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:
9		-)))
10	10
11		-(((
12	12	[[Point to Point Software for LT-22222-L>>https://github.com/dragino/LT-22222-L]].
13		-)))
14	14
15	15	== ==
16	16
17		-= **2. Features for this firmware** =
	13	+= Features for this firmware: =
18	18
19		-
20		-== **2.1  Overview** ==
21		-
22		-[[image:image-20220602111219-1.png]]
23		-
24		-
25		-== **2.2. Configure** ==
26		-
27		-(% border="1" style="background-color:#f7faff; color:black; width:500px" %)
28		-|=**A's configuration**|=**B's configuration**
29		-|AT+GROUPMOD=0|AT+GROUPMOD=0
30		-|AT+TXCHS=868700000|AT+TXCHS=869000000
31		-|AT+RXCHS=869000000|AT+RXCHS=868700000
32		-|AT+TRIG1=2,50|AT+TRIG1=2,50
33		-|AT+TRIG2=2,50|AT+TRIG2=2,50
34		-|AT+DI1TODO1=2|AT+DI1TODO1=2
35		-|AT+DI1TORO1=2|AT+DI1TORO1=2
36		-|AT+DI2TODO2=2 |AT+DI2TODO2=2
37		-|AT+DI2TORO2=2|AT+DI2TORO2=2
38		-
39		-== **2.3.  Serial port display** ==
40		-
41		-
42		-[[image:image-20220602111219-2.png]]
43		-
44		-
45		-[[image:image-20220602111219-3.png]]
46		-
47		-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.
48		-
49	49

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