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2	2	{{toc/}}
3	3	{{/box}}
4	4
5		-= Overview =
	5	+= **1. Overview** =
6	6
	7	+(((
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:
	9	+)))
8	8
	11	+(((
9	9	[[Point to Point Software for LT-22222-L>>https://github.com/dragino/LT-22222-L]].
	13	+)))
10	10
11	11	== ==
12	12
13		-= Features for this firmware: =
	17	+= **2. Features for this firmware** =
14	14
	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	+
	40	+
	41	+== **2.3.  Serial port display** ==
	42	+
	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	+
15	15