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Title

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1		-Set up CoAP Server

Content

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1		-**~ Contents:**
	1	+**~ Table of Contents:**
2	2
3	3	{{toc/}}
4	4
5	5
6		-= 1. Introduction =
7	7
	7	+= 1.  Introduction =
	8	+
	9	+
8	8	(((
9	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	)))
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11	11
12	12	(((
13	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.
	16	+
	17	+
14	14	)))
15	15
16	16	[[image:image-20220530084843-1.png]]
...	...	@@ -18,8 +18,10 @@
18	18	Network structure
19	19
20	20
21		-= 2. Install CoAP server =
22	22
	26	+= 2.  Install CoAP server =
	27	+
	28	+
23	23	Set up example in Ubuntu 18.04
24	24
25	25	(% class="box" %)
...	...	@@ -36,103 +36,116 @@
36	36	(((
37	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	38
	45	+
39	39
40	40	)))
41	41
42		-= 3. Test CoAP Server =
	49	+= 3.  Test CoAP Server =
43	43
44		-== 3.1 Install Copper in Chrome ==
	51	+== 3.1  Install Copper in Chrome ==
45	45
	53	+
46	46	(((
47		-~1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it.
	55	+(% style="color:blue" %)**1. Download Copper4Cr from [[https:~~/~~/github.com/mkovatsc/Copper4Cr>>url:https://github.com/mkovatsc/Copper4Cr]] and unpack it.**
48	48	)))
49	49
50	50	(((
51		-2. Run install.bat in the directory.
	59	+(% style="color:blue" %)**2. Run install.bat in the directory.**
52	52
	61	+
53	53	[[image:image-20220530085327-2.png]]
54	54	)))
55	55
56		-
57	57	Run install.bat
58	58
59	59
60		-3. Load the unpacked CoAP APP in Google Chrome:
61	61
62		-[[image:image-20220530085423-3.png]]
	69	+(% style="color:blue" %)**3. Load the unpacked CoAP APP in Google Chrome:**
63	63
	71	+[[image:image-20220530085423-3.png||height="241" width="1250"]]
	72	+
64	64	Install Copper APP
65	65
66	66
	76	+
67	67	[[image:image-20220530085531-4.png]]
68	68
69	69	Install APP Successful
70	70
71	71
72		-4. Load the unpacked CoAP extension in Google Chrome:
73	73
	83	+(% style="color:blue" %)**4. Load the unpacked CoAP extension in Google Chrome:**
	84	+
74	74	[[image:image-20220530085638-5.png||height="338" width="1320"]]
75	75
76	76	Install Copper Extension
77	77
78		-[[image:image-20220530090104-7.png]]
79	79
	90	+[[image:image-20220530090104-7.png||height="389" width="1282"]]
80	80
81	81	Install Extension Successful
82	82
83	83
84		-5. Replace the appID in file extension\endpoint\ClientPortChrome.js to Copper (Cu4Cr) Application ID
85	85
	96	+(% style="color:blue" %)**5. Replace the appID in file extension\endpoint\ClientPortChrome.js to Copper (Cu4Cr) Application ID**
	97	+
86	86	[[image:image-20220530090444-10.png]]
87	87
88		-
89	89	Replace ID
90	90
91	91
92		-6. Open the Copper extension. If you see below message, means install successfully.
93	93
	104	+**(% style="color:blue" %)6. Open the Copper extension. If you see below message, means install successfully.**
	105	+
94	94	[[image:image-20220530090404-9.png||height="658" width="1238"]]
95	95
96	96	Install Finished
97	97
98	98
99		-== 3.2 Test CoAP connection ==
100	100
	112	+== 3.2  Test CoAP connection ==
	113	+
	114	+
101	101	(((
102	102	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.
103	103
	118	+
104	104	[[image:image-20220530090848-13.png||height="616" width="1154"]]
105	105	)))
106	106
107		-
108	108	Connect to CoAP server
109	109
110	110
111		-== 3.3 Test CoAP Uplink ==
112	112
	126	+== 3.3  Test CoAP Uplink ==
	127	+
	128	+
113	113	(((
114	114	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.
115	115
	132	+
116	116	[[image:image-20220530090939-14.png]]
117	117	)))
118	118
119		-
120	120	Use MQTT.fx to subscribe the topic
121	121
122	122
	139	+
123	123	[[image:image-20220530091358-18.png||height="549" width="1035"]]
124	124
125		-
126	126	Use CoAP Exension to send a update to CoAP server
127	127
128	128
	145	+
129	129	[[image:image-20220530091237-17.png]]
130	130
131	131	MQTT.fx get the update of this topic on CoAP server
132	132
133	133
134		-== 3.4 Test CoAP Downlink ==
135	135
	152	+== 3.4  Test CoAP Downlink ==
	153	+
	154	+
136	136	(((
137	137	Try to use MQTT.fx to publish a message to the topic (topic0) in the server. CoAP extension will see this incomming message.
138	138	)))