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1		-**~ Contents:**
	1	+Contents:
2	2
3		-{{toc/}}
4	4
5	5	= 1. Introduction =
6	6
7	7	Notes for using Dragino Devices with TTN Stack3.
8	8
9		-
10	10	= 2. Downlink =
11	11
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		-(((
	12	+
15	15	**Download command is:**
16		-)))
17	17
18	18	(% class="box" %)
19	19	(((
...	...	@@ -20,15 +20,14 @@
20	20	mosquitto_pub -h eu1.cloud.thethings.industries -p 1883 -t v3/akXXXXXps@XXXXXX/devices/lsn50/down/push -u akXXXXXps@XXXXXX -P NNSXS.XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.LVQZECLX5FZ3XO5ACOW47IZ6HM54DMBBU776C53ZQHPLPQALIXYA -m '{"downlinks":[{"f_port": 2,"frm_payload":"AwAA","priority": "HIGH","confirmed": true}]}'
21	21	)))
22	22
23		-(((
	20	+
24	24	The MQTT command use (% style="color:#4f81bd" %)**-h,-p,-u,-P** (%%)options. We can find them in the website.
25		-)))
26	26
27		-[[image:image-20220526142338-3.png]]
	23	+[[image:https://wiki.dragino.com/images/thumb/2/2f/Stack_v3_downlink_1.png/600px-Stack_v3_downlink_1.png||height="375" width="600"]]
28	28
29	29	find -h : broker address , -p port and -u: user name
30	30
31		-[[image:image-20220526142307-2.png]]
	27	+[[image:https://wiki.dragino.com/images/thumb/a/a6/Stack_v3_downlink_2.png/600px-Stack_v3_downlink_2.png||height="395" width="600"]]
32	32
33	33	find -P : Password
34	34
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35	35
36	36	User MQTT.FX to simulate a downlink
37	37
38		-[[image:image-20220526142421-4.png]]
	34	+[[image:https://wiki.dragino.com/images/thumb/5/5c/Stack_v3_downlink_3.png/600px-Stack_v3_downlink_3.png||height="439" width="600"]]
39	39
40	40	Use MQTT.FX to simulate downlink
41	41
...	...	@@ -77,16 +77,12 @@
77	77	== 3.2 MIC Mismatch or MIC Failed ==
78	78
79	79	(((
80		-(((
81	81	When the device is registered or the device is working normally, the problem of MIC mismatch and MIC failed occurs.
82	82	)))
83		-)))
84	84
85	85	(((
86		-(((
87	87	Under normal circumstances, users need to change the APPKEY to solve this problem.
88	88	)))
89		-)))
90	90
91	91	[[image:https://wiki.dragino.com/images/thumb/d/dd/MIC_mismatch.png/600px-MIC_mismatch.png||height="208" width="600"]]
92	92

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