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23	23
24	24	(% style="color:#037691" %)**Video Instruction**(%%): **[[https:~~/~~/youtu.be/ZBjXwmp7rwM>>url:https://youtu.be/ZBjXwmp7rwM]]**
25	25
	26	+
26	26	Assume we have the LoRaWAN tracker LGT92 which works in ABP mode and US915 band. It has below keys:
27	27
28	28	(% class="box infomessage" %)
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38	38
39	39	We need to input above keys in LG308 and enable ABP decryption.
40	40
41		-[[image:https://wiki.dragino.com/images/thumb/5/55/LG308_MQTT_1.png/600px-LG308_MQTT_1.png||height="329" width="600"]]
	42	+[[image:image-20220527161119-1.png]]
42	42
43	43	Input the ABP keys in LG308
44	44
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51	51	We can see the log of LG308 to know this packet arrive
52	52	)))
53	53
54		-[[image:https://wiki.dragino.com/images/thumb/1/16/ABP_DECODE_2.png/600px-ABP_DECODE_2.png||height="205" width="600"]]
	55	+[[image:image-20220527161149-2.png]]
55	55
56	56	LG308 log by "logread -f" command
57	57
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61	61	(% class="box" %)
62	62	(((
63	63	root@dragino-1d25dc:~~# hexdump /var/iot/channels/2602111D
64		-0000000 (% class="mark" %)**4646 4646 4646 3946 3030 3030 3030 3546**(%%)      ~-~-> Got RSSI and SNR
65		-0000010 (% class="mark" %)**cc0c 0b63 0266 017f ff7f ff00 **(%%) ~-~-> Payload
	65	+0000000 (% style="color:#037691" %)**4646 4646 4646 3946 3030 3030 3030 3546**(%%)      ~-~-> Got RSSI and SNR
	66	+0000010 (% style="color:#037691" %)**cc0c 0b63 0266 017f ff7f ff00 **(%%) ~-~-> Payload
66	66	000001c
67	67	)))
68	68
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72	72
73	73	(% class="box" %)
74	74	(((
75		-(% class="mark" %)**Notice 1**(%%): The data file stored in LG308 for the end node is bin file. If the end node sends ASCII string to gateway, the output will as below:
76		-in LGT92, use **AT+SEND=12**:hello world to send ASCII string
	76	+(% style="color:red" %)**Notice 1**(%%): The data file stored in LG308 for the end node is bin file. If the end node sends ASCII string to gateway, the output will as below:
	77	+in LGT92, use **(% style="color:#037691" %)AT+SEND=12:hello world** (%%)to send ASCII string
77	77	root@dragino-1d25dc:~~# hexdump /var/iot/channels/2602111D
78	78	0000000 4646 4646 4646 3946 3030 3030 3030 3546
79	79	0000010 6865 6c6c 6f20 776f 726c 6400      ~-~-> Got ASCII code "hello world"
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82	82
83	83	(% class="box" %)
84	84	(((
85		-(% class="mark" %)**Notice 2**(%%): The upstream payload length should match the LoRaWAN length requirement (max length depends on Frequency and DR), otherwise the gateway can't decode the payload.
	86	+(% style="color:#037691" %)**Notice 2**(%%): The upstream payload length should match the LoRaWAN length requirement (max length depends on Frequency and DR), otherwise the gateway can't decode the payload.
86	86	)))
87	87
	89	+
88	88	=== 2.2.1 Decode Method ===
89	89
90		-The decode methods: **ASCII String, Decode_LHT65** doesn't affect how the sensor data is stored, they are to define how should the sensor data to be sent.
	92	+The decode methods: **(% style="color:#037691" %)ASCII String, Decode_LHT65**(%%) doesn't affect how the sensor data is stored, they are to define how should the sensor data to be sent.
91	91
92	92	For example we have a LHT65 , works in ABP mode and gateway successful get the data, which are:
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