Wiki source code of Set up CoAP Server
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| author | version | line-number | content |
|---|---|---|---|
| 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:https://wiki.dragino.com/images/thumb/2/25/CoAP_1.png/600px-CoAP_1.png||height="219" width="600"]] | ||
| 17 | |||
| 18 | Network structure | ||
| 19 | |||
| 20 | = 2. Install CoAP server = | ||
| 21 | |||
| 22 | Set up example in Ubuntu 18.04 | ||
| 23 | |||
| 24 | (% class="box" %) | ||
| 25 | ((( | ||
| 26 | sudo apt-get update | ||
| 27 | sudo apt-get upgrade | ||
| 28 | 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. | ||
| 29 | sudo dpkg –i emqx-ubuntu18.04-v3.2.4_amd64.deb #install EMQX | ||
| 30 | emqx start # Start EMQX service | ||
| 31 | emqx_ctl status #check if EMQX is running | ||
| 32 | ./bin/emqx_ctl plugins load emqx_coap # Run COAP service | ||
| 33 | ))) | ||
| 34 | |||
| 35 | (% 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.** | ||
| 36 | |||
| 37 | = 3. Test CoAP Server = | ||
| 38 | |||
| 39 | == 3.1 Install Copper in Chrome == | ||
| 40 | |||
| 41 | ((( | ||
| 42 | ~1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it. | ||
| 43 | ))) | ||
| 44 | |||
| 45 | ((( | ||
| 46 | 2. Run install.bat in the directory. | ||
| 47 | ))) | ||
| 48 | |||
| 49 | [[image:https://wiki.dragino.com/images/thumb/4/47/CoAP_Test_1.png/600px-CoAP_Test_1.png||height="191" width="600"]] | ||
| 50 | |||
| 51 | Run install.bat | ||
| 52 | |||
| 53 | |||
| 54 | 3. Load the unpacked CoAP APP in Google Chrome: | ||
| 55 | |||
| 56 | [[image:https://wiki.dragino.com/images/thumb/8/8b/CoAP_Test_2.png/600px-CoAP_Test_2.png||height="114" width="600"]] | ||
| 57 | |||
| 58 | Install Copper APP | ||
| 59 | |||
| 60 | [[image:https://wiki.dragino.com/images/thumb/7/70/CoAP_Test_3.png/600px-CoAP_Test_3.png||height="523" width="600"]] | ||
| 61 | |||
| 62 | Install APP Successful | ||
| 63 | |||
| 64 | |||
| 65 | 4. Load the unpacked CoAP extension in Google Chrome: | ||
| 66 | |||
| 67 | [[image:https://wiki.dragino.com/images/thumb/6/65/CoAP_Test_4.png/600px-CoAP_Test_4.png||height="154" width="600"]] | ||
| 68 | |||
| 69 | Install Copper Extension | ||
| 70 | |||
| 71 | [[image:https://wiki.dragino.com/images/thumb/9/99/CoAP_Test_5.png/600px-CoAP_Test_5.png||height="183" width="600"]] | ||
| 72 | |||
| 73 | Install Extension Successful | ||
| 74 | |||
| 75 | |||
| 76 | 5. Replace the appID in file extension\endpoint\ClientPortChrome.js to Copper (Cu4Cr) Application ID | ||
| 77 | |||
| 78 | [[image:https://wiki.dragino.com/images/thumb/7/7e/CoAP_Test_6.png/600px-CoAP_Test_6.png||height="301" width="600"]] | ||
| 79 | |||
| 80 | Replace ID | ||
| 81 | |||
| 82 | |||
| 83 | 6. Open the Copper extension. If you see below message, means install successfully. | ||
| 84 | |||
| 85 | [[image:https://wiki.dragino.com/images/thumb/b/b1/CoAP_Test_7.png/600px-CoAP_Test_7.png||height="323" width="600"]] | ||
| 86 | |||
| 87 | Install Finished | ||
| 88 | |||
| 89 | |||
| 90 | == 3.2 Test CoAP connection == | ||
| 91 | |||
| 92 | ((( | ||
| 93 | 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. | ||
| 94 | ))) | ||
| 95 | |||
| 96 | [[image:https://wiki.dragino.com/images/thumb/0/0c/CoAP_Test_8.png/600px-CoAP_Test_8.png||height="323" width="600"]] | ||
| 97 | |||
| 98 | Connect to CoAP server | ||
| 99 | |||
| 100 | |||
| 101 | == 3.3 Test CoAP Uplink == | ||
| 102 | |||
| 103 | ((( | ||
| 104 | 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. | ||
| 105 | ))) | ||
| 106 | |||
| 107 | [[image:https://wiki.dragino.com/images/thumb/b/b0/CoAP_Test_9.png/600px-CoAP_Test_9.png||height="429" width="600"]] | ||
| 108 | |||
| 109 | Use MQTT.fx to subscribe the topic | ||
| 110 | |||
| 111 | |||
| 112 | [[image:https://wiki.dragino.com/images/thumb/3/39/CoAP_Test_10.png/600px-CoAP_Test_10.png||height="323" width="600"]] | ||
| 113 | |||
| 114 | Use CoAP Exension to send a update to CoAP server | ||
| 115 | |||
| 116 | |||
| 117 | [[image:https://wiki.dragino.com/images/thumb/f/fe/CoAP_Test_11.png/600px-CoAP_Test_11.png||height="386" width="600"]] | ||
| 118 | |||
| 119 | MQTT.fx get the update of this topic on CoAP server | ||
| 120 | |||
| 121 | |||
| 122 | == 3.4 Test CoAP Downlink == | ||
| 123 | |||
| 124 | ((( | ||
| 125 | Try to use MQTT.fx to publish a message to the topic (topic0) in the server. CoAP extension will see this incomming message. | ||
| 126 | ))) | ||
| 127 | |||
| 128 | |||
| 129 | Use MQTT.fx to publish the topic | ||
| 130 | |||
| 131 | |||
| 132 | CoAP extension see the incoming message |