Wiki source code of Set up CoAP Server
Last modified by Xiaoling on 2024/08/19 16:01
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16.3 | 1 | **~ Table of Contents:** |
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1.1 | 2 | |
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1.3 | 3 | {{toc/}} |
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1.1 | 4 | |
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1.3 | 5 | |
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16.1 | 6 | |
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16.3 | 7 | = 1. Introduction = |
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1.1 | 8 | |
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16.3 | 9 | |
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1.2 | 10 | ((( |
11 | 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. | ||
12 | ))) | ||
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1.1 | 13 | |
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1.2 | 14 | ((( |
15 | 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. | ||
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16.3 | 16 | |
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1.2 | 18 | ))) |
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1.1 | 19 | |
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2.2 | 20 | [[image:image-20220530084843-1.png]] |
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1.1 | 21 | |
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1.2 | 22 | Network structure |
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1.1 | 23 | |
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2.2 | 24 | |
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16.3 | 25 | = 2. Install CoAP server = |
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1.2 | 28 | Set up example in Ubuntu 18.04 |
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1.1 | 29 | |
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1.2 | 30 | (% class="box" %) |
31 | ((( | ||
32 | sudo apt-get update | ||
33 | sudo apt-get upgrade | ||
34 | 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. | ||
35 | sudo dpkg –i emqx-ubuntu18.04-v3.2.4_amd64.deb #install EMQX | ||
36 | emqx start # Start EMQX service | ||
37 | emqx_ctl status #check if EMQX is running | ||
38 | ./bin/emqx_ctl plugins load emqx_coap # Run COAP service | ||
39 | ))) | ||
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1.1 | 40 | |
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1.5 | 41 | ((( |
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1.2 | 42 | (% 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.** |
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6.2 | 43 | |
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1.5 | 45 | ))) |
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1.1 | 46 | |
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16.4 | 47 | = 3. Test CoAP Server = |
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1.1 | 48 | |
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16.4 | 49 | == 3.1 Install Copper in Chrome == |
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1.1 | 50 | |
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16.3 | 51 | |
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1.2 | 52 | ((( |
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16.4 | 53 | (% style="color:blue" %)**1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it.** |
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1.2 | 54 | ))) |
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1.1 | 55 | |
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1.2 | 56 | ((( |
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16.4 | 57 | (% style="color:blue" %)**2. Run install.bat in the directory.** |
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6.2 | 58 | |
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16.3 | 59 | |
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6.2 | 60 | [[image:image-20220530085327-2.png]] |
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1.2 | 61 | ))) |
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1.1 | 62 | |
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1.2 | 63 | Run install.bat |
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16.4 | 66 | (% style="color:blue" %)**3. Load the unpacked CoAP APP in Google Chrome:** |
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1.2 | 67 | |
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16.1 | 68 | [[image:image-20220530085423-3.png||height="241" width="1250"]] |
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1.2 | 69 | |
70 | Install Copper APP | ||
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6.2 | 73 | [[image:image-20220530085531-4.png]] |
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1.2 | 75 | Install APP Successful |
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16.4 | 78 | (% style="color:blue" %)**4. Load the unpacked CoAP extension in Google Chrome:** |
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1.2 | 79 | |
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7.3 | 80 | [[image:image-20220530085638-5.png||height="338" width="1320"]] |
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1.2 | 81 | |
82 | Install Copper Extension | ||
83 | |||
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15.1 | 84 | |
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16.1 | 85 | [[image:image-20220530090104-7.png||height="389" width="1282"]] |
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1.2 | 86 | |
87 | Install Extension Successful | ||
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16.4 | 90 | (% style="color:blue" %)**5. Replace the appID in file extension\endpoint\ClientPortChrome.js to Copper (Cu4Cr) Application ID** |
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1.2 | 91 | |
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9.2 | 92 | [[image:image-20220530090444-10.png]] |
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1.2 | 93 | |
94 | Replace ID | ||
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16.6 | 97 | (% style="color:blue" %)**6. Open the Copper extension. If you see below message, means install successfully.** |
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1.2 | 98 | |
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8.4 | 99 | [[image:image-20220530090404-9.png||height="658" width="1238"]] |
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1.2 | 100 | |
101 | Install Finished | ||
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16.3 | 104 | == 3.2 Test CoAP connection == |
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1.2 | 107 | ((( |
108 | 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. | ||
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10.2 | 109 | |
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16.3 | 110 | |
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10.2 | 111 | [[image:image-20220530090848-13.png||height="616" width="1154"]] |
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1.2 | 112 | ))) |
113 | |||
114 | Connect to CoAP server | ||
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9.2 | 116 | |
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16.3 | 117 | == 3.3 Test CoAP Uplink == |
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1.2 | 120 | ((( |
121 | 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. | ||
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11.2 | 122 | |
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16.3 | 123 | |
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11.2 | 124 | [[image:image-20220530090939-14.png]] |
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1.2 | 125 | ))) |
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127 | Use MQTT.fx to subscribe the topic | ||
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13.4 | 130 | [[image:image-20220530091358-18.png||height="549" width="1035"]] |
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1.2 | 131 | |
132 | Use CoAP Exension to send a update to CoAP server | ||
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13.2 | 135 | [[image:image-20220530091237-17.png]] |
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1.2 | 136 | |
137 | MQTT.fx get the update of this topic on CoAP server | ||
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11.4 | 139 | |
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16.3 | 140 | == 3.4 Test CoAP Downlink == |
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1.3 | 143 | ((( |
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1.2 | 144 | Try to use MQTT.fx to publish a message to the topic (topic0) in the server. CoAP extension will see this incomming message. |
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17.1 | 145 | |
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1.3 | 147 | ))) |