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1		-**~ Table of Contents:**
	1	+**~ Contents:**
2	2
3	3	{{toc/}}
4	4
	5	+= 1. Introduction =
5	5
6		-
7		-
8		-= 1.  Introduction =
9		-
10		-
11	11	Notes for using Dragino Devices with TTN Stack3.
12	12
13	13
	10	+= 2. Downlink =
14	14
15		-= 2.  Downlink =
16		-
17		-
18	18	Use MQTT API for downlink: Reference: [[TTN Stack v3 MQTT reference>>url:https://thethingsstack.io/v3.1.0/guides/getting-started/mqtt/]]
19	19
20	20	(((
21		-(% style="color:blue" %)**Download command is:**
	15	+**Download command is:**
22	22	)))
23	23
24	24	(% class="box" %)
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27	27	)))
28	28
29	29	(((
30		-
31		-
32		-The MQTT command use (% style="color:blue" %)**-h,-p,-u,-P** (%%)options. We can find them in the website.
33		-
34		-
	24	+The MQTT command use (% style="color:#4f81bd" %)**-h,-p,-u,-P** (%%)options. We can find them in the website.
35	35	)))
36	36
37	37	[[image:image-20220526142338-3.png]]
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38	38
39	39	find -h : broker address , -p port and -u: user name
40	40
41		-
42	42	[[image:image-20220526142307-2.png]]
43	43
44	44	find -P : Password
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53	53
54	54	Input connection info
55	55
56		-[[image:image-20220526142512-5.png]]
	45	+[[image:https://wiki.dragino.com/images/thumb/4/44/Stack_v3_downlink_4.png/600px-Stack_v3_downlink_4.png||height="437" width="600"]]
57	57
58	58	Input MQTT connection info
59	59
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60	60
61	61	Send a downstream
62	62
63		-[[image:image-20220526142539-6.png]]
	52	+[[image:https://wiki.dragino.com/images/thumb/e/ec/Stack_v3_downlink_5.png/600px-Stack_v3_downlink_5.png||alt="Stack v3 downlink 5.png" height="438" width="600"]]
64	64
65	65	Gateway traffic for downstream
66	66
	56	+[[image:https://wiki.dragino.com/images/thumb/8/8a/Stack_v3_downlink_8.png/600px-Stack_v3_downlink_8.png||alt="Stack v3 downlink 8.png" height="235" width="600"]]
67	67
68		-[[image:image-20220526142616-7.png||height="579" width="1407"]]
69	69
70		-
71	71	Downstream data flow will like below:
72	72
73		-[[image:image-20220526142741-8.png]]
	61	+[[image:https://wiki.dragino.com/images/thumb/d/d1/Stack_v3_downlink_6.png/600px-Stack_v3_downlink_6.png||alt="Stack v3 downlink 6.png" height="233" width="600"]]
74	74
75		-[[image:image-20220526142826-9.png]]
	63	+[[image:https://wiki.dragino.com/images/1/1f/Stack_v3_downlink_7.png||alt="Stack v3 downlink 7.png" height="371" width="453"]]
76	76
77		-
78	78	= 3. Trouble Shooting =
79	79
80	80	== 3.1 Problem when register a device to TTNv3 if it is already register to TTNv2 ==
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81	81
82	82	When you register the device in V2 and V3 with the same key and EUI, the device can only connect to V2.
83	83
84		-[[image:image-20220526142914-10.png]]
	71	+[[image:https://wiki.dragino.com/images/thumb/0/0d/V3v2.png/600px-V3v2.png||alt="V3v2.png" height="403" width="600"]]
85	85
86		-[[image:image-20220526143018-11.png||height="619" width="1049"]]
	73	+[[image:https://wiki.dragino.com/images/thumb/b/b9/V2v3.png/600px-V2v3.png||alt="V2v3.png" height="352" width="600"]]
87	87
88	88	If you want the device to connect to V3. You must change your key and EUI, or delete the device registered on V2.
89	89
90		-
91	91	== 3.2 MIC Mismatch or MIC Failed ==
92	92
93	93	(((
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102	102	)))
103	103	)))
104	104
105		-[[image:image-20220526143057-12.png]]
	91	+[[image:https://wiki.dragino.com/images/thumb/d/dd/MIC_mismatch.png/600px-MIC_mismatch.png||height="208" width="600"]]
106	106
107	107	MIC Mismatch

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