Wiki source code of Set up CoAP Server
Last modified by Xiaoling on 2022/07/27 18:05
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| author | version | line-number | content |
|---|---|---|---|
| 1 | **~ Table of Contents:** | ||
| 2 | |||
| 3 | {{toc/}} | ||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 | = 1. Introduction = | ||
| 8 | |||
| 9 | |||
| 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 | ))) | ||
| 13 | |||
| 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. | ||
| 16 | |||
| 17 | |||
| 18 | ))) | ||
| 19 | |||
| 20 | [[image:image-20220530084843-1.png]] | ||
| 21 | |||
| 22 | Network structure | ||
| 23 | |||
| 24 | |||
| 25 | |||
| 26 | = 2. Install CoAP server = | ||
| 27 | |||
| 28 | |||
| 29 | Set up example in Ubuntu 18.04 | ||
| 30 | |||
| 31 | (% class="box" %) | ||
| 32 | ((( | ||
| 33 | sudo apt-get update | ||
| 34 | sudo apt-get upgrade | ||
| 35 | 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. | ||
| 36 | sudo dpkg –i emqx-ubuntu18.04-v3.2.4_amd64.deb #install EMQX | ||
| 37 | emqx start # Start EMQX service | ||
| 38 | emqx_ctl status #check if EMQX is running | ||
| 39 | ./bin/emqx_ctl plugins load emqx_coap # Run COAP service | ||
| 40 | ))) | ||
| 41 | |||
| 42 | ((( | ||
| 43 | (% 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.** | ||
| 44 | |||
| 45 | |||
| 46 | |||
| 47 | ))) | ||
| 48 | |||
| 49 | = 3. Test CoAP Server = | ||
| 50 | |||
| 51 | == 3.1 Install Copper in Chrome == | ||
| 52 | |||
| 53 | |||
| 54 | ((( | ||
| 55 | (% style="color:blue" %)**1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it.** | ||
| 56 | ))) | ||
| 57 | |||
| 58 | ((( | ||
| 59 | (% style="color:blue" %)**2. Run install.bat in the directory.** | ||
| 60 | |||
| 61 | |||
| 62 | [[image:image-20220530085327-2.png]] | ||
| 63 | ))) | ||
| 64 | |||
| 65 | Run install.bat | ||
| 66 | |||
| 67 | |||
| 68 | |||
| 69 | (% style="color:blue" %)**3. Load the unpacked CoAP APP in Google Chrome:** | ||
| 70 | |||
| 71 | [[image:image-20220530085423-3.png||height="241" width="1250"]] | ||
| 72 | |||
| 73 | Install Copper APP | ||
| 74 | |||
| 75 | |||
| 76 | |||
| 77 | [[image:image-20220530085531-4.png]] | ||
| 78 | |||
| 79 | Install APP Successful | ||
| 80 | |||
| 81 | |||
| 82 | |||
| 83 | (% style="color:blue" %)**4. Load the unpacked CoAP extension in Google Chrome:** | ||
| 84 | |||
| 85 | [[image:image-20220530085638-5.png||height="338" width="1320"]] | ||
| 86 | |||
| 87 | Install Copper Extension | ||
| 88 | |||
| 89 | |||
| 90 | [[image:image-20220530090104-7.png||height="389" width="1282"]] | ||
| 91 | |||
| 92 | Install Extension Successful | ||
| 93 | |||
| 94 | |||
| 95 | |||
| 96 | (% style="color:blue" %)**5. Replace the appID in file extension\endpoint\ClientPortChrome.js to Copper (Cu4Cr) Application ID** | ||
| 97 | |||
| 98 | [[image:image-20220530090444-10.png]] | ||
| 99 | |||
| 100 | Replace ID | ||
| 101 | |||
| 102 | |||
| 103 | |||
| 104 | (% style="color:blue" %)**6. Open the Copper extension. If you see below message, means install successfully.** | ||
| 105 | |||
| 106 | [[image:image-20220530090404-9.png||height="658" width="1238"]] | ||
| 107 | |||
| 108 | Install Finished | ||
| 109 | |||
| 110 | |||
| 111 | |||
| 112 | == 3.2 Test CoAP connection == | ||
| 113 | |||
| 114 | |||
| 115 | ((( | ||
| 116 | 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. | ||
| 117 | |||
| 118 | |||
| 119 | [[image:image-20220530090848-13.png||height="616" width="1154"]] | ||
| 120 | ))) | ||
| 121 | |||
| 122 | Connect to CoAP server | ||
| 123 | |||
| 124 | |||
| 125 | |||
| 126 | == 3.3 Test CoAP Uplink == | ||
| 127 | |||
| 128 | |||
| 129 | ((( | ||
| 130 | 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. | ||
| 131 | |||
| 132 | |||
| 133 | [[image:image-20220530090939-14.png]] | ||
| 134 | ))) | ||
| 135 | |||
| 136 | Use MQTT.fx to subscribe the topic | ||
| 137 | |||
| 138 | |||
| 139 | |||
| 140 | [[image:image-20220530091358-18.png||height="549" width="1035"]] | ||
| 141 | |||
| 142 | Use CoAP Exension to send a update to CoAP server | ||
| 143 | |||
| 144 | |||
| 145 | |||
| 146 | [[image:image-20220530091237-17.png]] | ||
| 147 | |||
| 148 | MQTT.fx get the update of this topic on CoAP server | ||
| 149 | |||
| 150 | |||
| 151 | |||
| 152 | == 3.4 Test CoAP Downlink == | ||
| 153 | |||
| 154 | |||
| 155 | ((( | ||
| 156 | Try to use MQTT.fx to publish a message to the topic (topic0) in the server. CoAP extension will see this incomming message. | ||
| 157 | ))) |