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1		-**~ Contents:**
	1	+**~ Table of Contents:**
2	2
3	3	{{toc/}}
4	4
5		-= 1. Introduction =
6	6
	6	+
	7	+
	8	+= 1.  Introduction =
	9	+
	10	+
7	7	Notes for using Dragino Devices with TTN Stack3.
8	8
9	9
10		-= 2. Downlink =
11	11
	15	+= 2.  Downlink =
	16	+
	17	+
12	12	Use MQTT API for downlink: Reference: [[TTN Stack v3 MQTT reference>>url:https://thethingsstack.io/v3.1.0/guides/getting-started/mqtt/]]
13	13
14	14	(((
15		-**Download command is:**
	21	+(% style="color:blue" %)**Download command is:**
16	16	)))
17	17
18	18	(% class="box" %)
...	...	@@ -21,7 +21,11 @@
21	21	)))
22	22
23	23	(((
24		-The MQTT command use (% style="color:#4f81bd" %)**-h,-p,-u,-P** (%%)options. We can find them in the website.
	30	+
	31	+
	32	+The MQTT command use (% style="color:blue" %)**-h,-p,-u,-P** (%%)options. We can find them in the website.
	33	+
	34	+
25	25	)))
26	26
27	27	[[image:image-20220526142338-3.png]]
...	...	@@ -28,6 +28,7 @@
28	28
29	29	find -h : broker address , -p port and -u: user name
30	30
	41	+
31	31	[[image:image-20220526142307-2.png]]
32	32
33	33	find -P : Password
...	...	@@ -42,7 +42,7 @@
42	42
43	43	Input connection info
44	44
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"]]
	56	+[[image:image-20220526142512-5.png]]
46	46
47	47	Input MQTT connection info
48	48
...	...	@@ -49,19 +49,21 @@
49	49
50	50	Send a downstream
51	51
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"]]
	63	+[[image:image-20220526142539-6.png]]
53	53
54	54	Gateway traffic for downstream
55	55
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"]]
57	57
	68	+[[image:image-20220526142616-7.png||height="579" width="1407"]]
58	58
	70	+
59	59	Downstream data flow will like below:
60	60
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"]]
	73	+[[image:image-20220526142741-8.png]]
62	62
63		-[[image:https://wiki.dragino.com/images/1/1f/Stack_v3_downlink_7.png||alt="Stack v3 downlink 7.png" height="371" width="453"]]
	75	+[[image:image-20220526142826-9.png]]
64	64
	77	+
65	65	= 3. Trouble Shooting =
66	66
67	67	== 3.1 Problem when register a device to TTNv3 if it is already register to TTNv2 ==
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68	68
69	69	When you register the device in V2 and V3 with the same key and EUI, the device can only connect to V2.
70	70
71		-[[image:https://wiki.dragino.com/images/thumb/0/0d/V3v2.png/600px-V3v2.png||alt="V3v2.png" height="403" width="600"]]
	84	+[[image:image-20220526142914-10.png]]
72	72
73		-[[image:https://wiki.dragino.com/images/thumb/b/b9/V2v3.png/600px-V2v3.png||alt="V2v3.png" height="352" width="600"]]
	86	+[[image:image-20220526143018-11.png||height="619" width="1049"]]
74	74
75	75	If you want the device to connect to V3. You must change your key and EUI, or delete the device registered on V2.
76	76
	90	+
77	77	== 3.2 MIC Mismatch or MIC Failed ==
78	78
79	79	(((
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88	88	)))
89	89	)))
90	90
91		-[[image:https://wiki.dragino.com/images/thumb/d/dd/MIC_mismatch.png/600px-MIC_mismatch.png||height="208" width="600"]]
	105	+[[image:image-20220526143057-12.png]]
92	92
93	93	MIC Mismatch

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