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Wiki source code of TTN Stack 3

Version 14.7 by Xiaoling on 2022/07/25 10:08
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1 **~ Table of Contents:**
2
3 {{toc/}}
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5
6
7
8 = 1.  Introduction =
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10
11 Notes for using Dragino Devices with TTN Stack3.
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13
14
15 = 2.  Downlink =
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17
18 Use MQTT API for downlink: Reference: [[TTN Stack v3 MQTT reference>>url:https://thethingsstack.io/v3.1.0/guides/getting-started/mqtt/]]
19
20 (((
21 (% style="color:blue" %)**Download command is:**
22 )))
23
24 (% class="box" %)
25 (((
26 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}]}'
27 )))
28
29 (((
30
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32 The MQTT command use (% style="color:blue" %)**-h,-p,-u,-P** (%%)options. We can find them in the website.
33
34
35 )))
36
37 [[image:image-20220526142338-3.png]]
38
39 **find -h : broker address , -p port and -u: user name**
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41
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43 [[image:image-20220526142307-2.png]]
44
45 **find -P : Password**
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47
48
49 User MQTT.FX to simulate a downlink
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51 [[image:image-20220526142421-4.png]]
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53 Use MQTT.FX to simulate downlink
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55
56
57 Input connection info
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59 [[image:image-20220526142512-5.png]]
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61 Input MQTT connection info
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63
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65 Send a downstream
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67 [[image:image-20220526142539-6.png]]
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69 Gateway traffic for downstream
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73 [[image:image-20220526142616-7.png||height="579" width="1407"]]
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75
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77 Downstream data flow will like below:
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79 [[image:image-20220526142741-8.png]]
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81 [[image:image-20220526142826-9.png]]
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83
84
85 = 3.  Trouble Shooting =
86
87 == 3.1  Problem when register a device to TTNv3 if it is already register to TTNv2 ==
88
89
90 When you register the device in V2 and V3 with the same key and EUI, the device can only connect to V2.
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92
93 [[image:image-20220526142914-10.png]]
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95 [[image:image-20220526143018-11.png||height="619" width="1049"]]
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98 If you want the device to connect to V3. You must change your key and EUI, or delete the device registered on V2.
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100
101
102 == 3.2  MIC Mismatch or MIC Failed ==
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104
105 (((
106 (((
107 When the device is registered or the device is working normally, the problem of MIC mismatch and MIC failed occurs.
108 )))
109 )))
110
111 (((
112 (((
113 Under normal circumstances, users need to change the APPKEY to solve this problem.
114
115
116 )))
117 )))
118
119 [[image:image-20220526143057-12.png]]
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121 MIC Mismatch