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11	11	* User wants to get data forward in gateway and forward to their server base on MQTT/HTTP, etc. (Combine ABP communication method and [[MQTT forward together>>url:https://wiki.dragino.com/index.php/MQTT_Forward_Instruction]]).
12	12
13	13	(((
14		-The basic of this feature is the decoding of (% style="color:red" %)**LoRaWAN ABP End Node**(%%). Requirements:
	14	+The basic of this feature is the decoding of **LoRaWAN ABP End Node**. Requirements:
15	15	)))
16	16
17	17	1. LoRaWAN End Node in ABP mode. Make sure your end node works in this mode. End node most are default set to OTAA mode
18	18	1. LoRaWAN Gateway model: [[LPS8>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/148-lps8.html]], [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]], [[DLOS8>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/160-dlos8.html]] ,[[LIG16>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/171-lig16.html]]
19		-1. Firmware version for below instruction:**[[(% style="color:purple" %)Since LG02_LG08~~-~~-build-v5.4.1593400722-20200629-1120>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]](%%)**
	19	+1. Firmware version for below instruction:[[Since LG02_LG08~~-~~-build-v5.4.1593400722-20200629-1120>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
20	20
21	21	= 2. How it works =
22	22
23	23
24		-(% style="color:#037691" %)**Video Instruction**(%%): **[[https:~~/~~/youtu.be/ZBjXwmp7rwM>>url:https://youtu.be/ZBjXwmp7rwM]]**
	24	+**Video Instruction**: [[https:~~/~~/youtu.be/ZBjXwmp7rwM>>url:https://youtu.be/ZBjXwmp7rwM]]
25	25
26		-
27	27	Assume we have the LoRaWAN tracker LGT92 which works in ABP mode and US915 band. It has below keys:
28	28
29	29	(% class="box infomessage" %)
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39	39
40	40	We need to input above keys in LG308 and enable ABP decryption.
41	41
42		-[[image:image-20220527161119-1.png]]
	41	+[[image:https://wiki.dragino.com/images/thumb/5/55/LG308_MQTT_1.png/600px-LG308_MQTT_1.png||height="329" width="600"]]
43	43
44	44	Input the ABP keys in LG308
45	45
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52	52	We can see the log of LG308 to know this packet arrive
53	53	)))
54	54
55		-[[image:image-20220527161149-2.png]]
	54	+[[image:https://wiki.dragino.com/images/thumb/1/16/ABP_DECODE_2.png/600px-ABP_DECODE_2.png||height="205" width="600"]]
56	56
57	57	LG308 log by "logread -f" command
58	58
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62	62	(% class="box" %)
63	63	(((
64	64	root@dragino-1d25dc:~~# hexdump /var/iot/channels/2602111D
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
	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
67	67	000001c
68	68	)))
69	69
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73	73
74	74	(% class="box" %)
75	75	(((
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
	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
78	78	root@dragino-1d25dc:~~# hexdump /var/iot/channels/2602111D
79	79	0000000 4646 4646 4646 3946 3030 3030 3030 3546
80	80	0000010 6865 6c6c 6f20 776f 726c 6400      ~-~-> Got ASCII code "hello world"
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83	83
84	84	(% class="box" %)
85	85	(((
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.
	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.
87	87	)))
88	88
89		-
90	90	=== 2.2.1 Decode Method ===
91	91
92	92	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.

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