Wiki source code of Set up CoAP Server
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1 | **~ Contents:** | ||
2 | |||
3 | {{toc/}} | ||
4 | |||
5 | |||
6 | = 1. Introduction = | ||
7 | |||
8 | ((( | ||
9 | In this chapter, we set up a CoAP/ MQTT server by using Open Source MQTT Broker : [[EMQX.IO>>url:https://www.emqx.io/]]. And show how to communicate it with CoAP and MQTT. | ||
10 | ))) | ||
11 | |||
12 | ((( | ||
13 | Below is the network structure. The end device use CoAP to connect our Emqx server via NB-IoT network. EMQ X broker will further process the data for the actually application. | ||
14 | ))) | ||
15 | |||
16 | [[image:image-20220530084843-1.png]] | ||
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18 | Network structure | ||
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20 | |||
21 | = 2. Install CoAP server = | ||
22 | |||
23 | Set up example in Ubuntu 18.04 | ||
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25 | (% class="box" %) | ||
26 | ((( | ||
27 | sudo apt-get update | ||
28 | sudo apt-get upgrade | ||
29 | wget [[https:~~/~~/www.emqx.io/downloads/broker/v3.2.7/emqx-ubuntu18.04-v3.2.7_amd64.deb>>url:https://www.emqx.io/downloads/broker/v3.2.7/emqx-ubuntu18.04-v3.2.7_amd64.deb]] #download the installation package. | ||
30 | sudo dpkg –i emqx-ubuntu18.04-v3.2.4_amd64.deb #install EMQX | ||
31 | emqx start # Start EMQX service | ||
32 | emqx_ctl status #check if EMQX is running | ||
33 | ./bin/emqx_ctl plugins load emqx_coap # Run COAP service | ||
34 | ))) | ||
35 | |||
36 | ((( | ||
37 | (% style="color:red" %)**Notice: CoAP default port use 5683, if you install EMQX in a cloud server, make sure you open the UDP port 5683. So can receive the packets from NB-IoT.** | ||
38 | ))) | ||
39 | |||
40 | = 3. Test CoAP Server = | ||
41 | |||
42 | == 3.1 Install Copper in Chrome == | ||
43 | |||
44 | ((( | ||
45 | ~1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it. | ||
46 | ))) | ||
47 | |||
48 | ((( | ||
49 | 2. Run install.bat in the directory. | ||
50 | ))) | ||
51 | |||
52 | [[image:https://wiki.dragino.com/images/thumb/4/47/CoAP_Test_1.png/600px-CoAP_Test_1.png||height="191" width="600"]] | ||
53 | |||
54 | Run install.bat | ||
55 | |||
56 | |||
57 | 3. Load the unpacked CoAP APP in Google Chrome: | ||
58 | |||
59 | [[image:https://wiki.dragino.com/images/thumb/8/8b/CoAP_Test_2.png/600px-CoAP_Test_2.png||height="114" width="600"]] | ||
60 | |||
61 | Install Copper APP | ||
62 | |||
63 | [[image:https://wiki.dragino.com/images/thumb/7/70/CoAP_Test_3.png/687px-CoAP_Test_3.png||alt="File:CoAP Test 3.png"]] | ||
64 | |||
65 | Install APP Successful | ||
66 | |||
67 | |||
68 | 4. Load the unpacked CoAP extension in Google Chrome: | ||
69 | |||
70 | [[image:https://wiki.dragino.com/images/thumb/6/65/CoAP_Test_4.png/600px-CoAP_Test_4.png||height="154" width="600"]] | ||
71 | |||
72 | Install Copper Extension | ||
73 | |||
74 | [[image:https://wiki.dragino.com/images/thumb/9/99/CoAP_Test_5.png/600px-CoAP_Test_5.png||height="183" width="600"]] | ||
75 | |||
76 | Install Extension Successful | ||
77 | |||
78 | |||
79 | 5. Replace the appID in file extension\endpoint\ClientPortChrome.js to Copper (Cu4Cr) Application ID | ||
80 | |||
81 | [[image:https://wiki.dragino.com/images/thumb/7/7e/CoAP_Test_6.png/600px-CoAP_Test_6.png||height="301" width="600"]] | ||
82 | |||
83 | Replace ID | ||
84 | |||
85 | |||
86 | 6. Open the Copper extension. If you see below message, means install successfully. | ||
87 | |||
88 | [[image:https://wiki.dragino.com/images/thumb/b/b1/CoAP_Test_7.png/600px-CoAP_Test_7.png||height="323" width="600"]] | ||
89 | |||
90 | Install Finished | ||
91 | |||
92 | |||
93 | == 3.2 Test CoAP connection == | ||
94 | |||
95 | ((( | ||
96 | Use Chrome Copper externsion to connect to the CoAP server. Input coap:~/~/COAP_SERVER_IP/mqtt/topic0?c=t1 to connect to the MQTT topic0 in CoAP server. Replace COAP_SERVER_IP with your COAP Server IP address, and refer [[here>>url:https://github.com/emqx/emqx-coap]] for the CoAP detail in EMQX. When connection ok, you can see below window. | ||
97 | ))) | ||
98 | |||
99 | [[image:https://wiki.dragino.com/images/thumb/0/0c/CoAP_Test_8.png/600px-CoAP_Test_8.png||height="323" width="600"]] | ||
100 | |||
101 | Connect to CoAP server | ||
102 | |||
103 | == 3.3 Test CoAP Uplink == | ||
104 | |||
105 | ((( | ||
106 | Try to use MQTT.fx to subscribe a the topic (topic0) in the server. And use CoAP to send a message to this topic, we can see the message arrive the topic0 and shown in MQTT.fx. | ||
107 | ))) | ||
108 | |||
109 | [[image:https://wiki.dragino.com/images/thumb/b/b0/CoAP_Test_9.png/600px-CoAP_Test_9.png||height="429" width="600"]] | ||
110 | |||
111 | Use MQTT.fx to subscribe the topic | ||
112 | |||
113 | |||
114 | [[image:https://wiki.dragino.com/images/thumb/3/39/CoAP_Test_10.png/600px-CoAP_Test_10.png||height="323" width="600"]] | ||
115 | |||
116 | Use CoAP Exension to send a update to CoAP server | ||
117 | |||
118 | |||
119 | [[image:https://wiki.dragino.com/images/thumb/f/fe/CoAP_Test_11.png/600px-CoAP_Test_11.png||height="386" width="600"]] | ||
120 | |||
121 | MQTT.fx get the update of this topic on CoAP server | ||
122 | |||
123 | == 3.4 Test CoAP Downlink == | ||
124 | |||
125 | ((( | ||
126 | Try to use MQTT.fx to publish a message to the topic (topic0) in the server. CoAP extension will see this incomming message. | ||
127 | ))) |