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1		-{{box cssClass="floatinginfobox" title="**Contents**"}}
	1	+**~ Contents:**
	2	+
2	2	{{toc/}}
3		-{{/box}}
4	4
5		-= Paragraph 1 =
6	6
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	6	+= 1. Introduction =
8	8
9		-== Sub-paragraph ==
	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	+)))
10	10
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	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	+)))
12	12
13		-== Sub-paragraph ==
	16	+[[image:https://wiki.dragino.com/images/thumb/2/25/CoAP_1.png/600px-CoAP_1.png||height="219" width="600"]]
14	14
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	18	+Network structure
16	16
17		-=== Sub-sub paragraph ===
	20	+= 2. Install CoAP server =
18	18
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	22	+Set up example in Ubuntu 18.04
20	20
	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	+)))
21	21
22		-= Paragraph 2 =
	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.**
23	23
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	37	+= 3. Test CoAP Server =
25	25
26		-== Sub-paragraph ==
	39	+== 3.1 Install Copper in Chrome ==
27	27
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	41	+(((
	42	+~1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it.
	43	+)))
29	29
30		-== Sub-paragraph ==
	45	+(((
	46	+2. Run install.bat in the directory.
	47	+)))
31	31
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	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