Changes for page Node-RED_Install and Use

Last modified by Herong Lu on 2024/03/05 08:37
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From version < 41.1 >
edited by Edwin Chen
on 2022/10/16 08:02
To version < 37.4 >
edited by Xiaoling
on 2022/07/25 15:33
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Author
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1 -XWiki.Edwin
1 +XWiki.Xiaoling
Content
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58 58  == 1.2  Install in Dragino Gataway ==
59 59  
60 60  
61 -The below models from Dragino already have Node-Red installed by default. Users no need to install it by themselves.
62 62  
63 -* [[LPS8v2 Indoor LoRaWAN Gateway. >>https://www.dragino.com/products/lora-lorawan-gateway/item/228-lps8v2.html]]
62 += 2.  Use Node-RED =
64 64  
65 -Other gateway model doesn't support built-in Node-Red server.
66 66  
67 -
68 -= 2.  General Use of  Node-RED =
69 -
70 -
71 -This section describes some basic features of Node-RED. For more info please check the [[Node-RED official document>>https://nodered.org/]].
72 -
73 -
74 74  == 2.1  Login to Node-RED interface ==
75 75  
76 76  
... ... @@ -78,7 +78,7 @@
78 78  
79 79  example：[[http:~~/~~/xxx.xx.xx.xx:1880/>>http://119.91.62.30:1880/]]
80 80  
81 -[[image:image-20220519104115-4.png||height="280" width="768"]]
72 +[[image:image-20220519104115-4.png||height="352" width="969"]]
82 82  
83 83  
84 84  
... ... @@ -87,67 +87,50 @@
87 87  
88 88  Take NBSN95 mod1 UDP protocol as an example
89 89  
90 -After logging into the interface click** (% style="color:red" %)"+" (%%)**to create a flow
81 +After logging into the interface click '+' to create a flow
91 91  
92 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519133634-1.png?rev=1.1||alt="image-20220519133634-1.png" height="183" width="770"]]
83 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519133634-1.png?rev=1.1||alt="image-20220519133634-1.png" height="231" width="972"]]
93 93  
94 -
95 -
96 96  Rename the stream
97 97  
98 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134042-2.png?rev=1.1||alt="image-20220519134042-2.png" height="535" width="548"]]
87 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134042-2.png?rev=1.1||alt="image-20220519134042-2.png" height="552" width="565"]]
99 99  
89 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134318-3.png?rev=1.1||alt="image-20220519134318-3.png"]]
100 100  
101 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134318-3.png?rev=1.1||alt="image-20220519134318-3.png" height="461" width="753"]]
102 -
103 -
104 104  [[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134346-4.png?rev=1.1||alt="image-20220519134346-4.png"]]
105 105  
106 106  Drag UDP into the editing area
107 107  
108 -
109 -
110 110  [[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134533-5.png?rev=1.1||alt="image-20220519134533-5.png"]]
111 111  
112 -
113 113  The same method as above, drag and drop functions and debug into the editing area
114 114  
115 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134850-6.png?rev=1.1||alt="image-20220519134850-6.png" height="442" width="776"]]
99 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519134850-6.png?rev=1.1||alt="image-20220519134850-6.png"]]
116 116  
117 -
118 -
119 119  configure UDP in
120 120  
121 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519135402-7.png?rev=1.1||alt="image-20220519135402-7.png" height="332" width="767"]]
103 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519135402-7.png?rev=1.1||alt="image-20220519135402-7.png"]]
122 122  
123 -
124 124  Write to the UDP port that the device node sends to the server
125 125  
126 126  Example My UDP device node sends to server port 8585
127 127  just write 8585
128 128  
110 +Note that the port that is already in use cannot be used. If the receiving fails, you need to check whether the port of the server is occupied. The sending port of the device node should not use the default port used by the server, such as a common port such as 8080.
129 129  
130 -(% style="color:red" %)**Note: that the port that is already in use cannot be used. If the receiving fails, you need to check whether the port of the server is occupied. The sending port of the device node should not use the default port used by the server, such as a common port such as 8080.**
131 -
132 -
133 133  In order to avoid data confusion, different types of nodes do not use the same UDP port, because different nodes have different data formats and different functions.
134 134  
135 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519135915-8.png?rev=1.1||alt="image-20220519135915-8.png" height="415" width="735"]]
114 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519135915-8.png?rev=1.1||alt="image-20220519135915-8.png"]]
136 136  
116 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519144651-14.png?rev=1.1||alt="image-20220519144651-14.png"]]
137 137  
138 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519144651-14.png?rev=1.1||alt="image-20220519144651-14.png" height="348" width="779"]]
118 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519141355-11.png?rev=1.1||alt="image-20220519141355-11.png"]]
139 139  
120 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519141704-12.png?rev=1.1||alt="image-20220519141704-12.png"]]
140 140  
141 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519141355-11.png?rev=1.1||alt="image-20220519141355-11.png" height="437" width="744"]]
142 -
143 -
144 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519141704-12.png?rev=1.1||alt="image-20220519141704-12.png" height="229" width="777"]]
145 -
146 -
147 -
148 148  When the node successfully sends data, the effect shown in the following figure will appear
149 149  
150 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519150455-15.png?rev=1.1||alt="image-20220519150455-15.png" height="403" width="799"]]
124 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519150455-15.png?rev=1.1||alt="image-20220519150455-15.png"]]
151 151  
152 152  
153 153  
... ... @@ -157,11 +157,10 @@
157 157  If you are familiar with JS code, you can write it yourself
158 158  If you are not familiar, we have the JS code for each type of node, you just need to copy and paste it into it
159 159  
134 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519141833-13.png?rev=1.1||alt="image-20220519141833-13.png"]]
160 160  
161 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519141833-13.png?rev=1.1||alt="image-20220519141833-13.png" height="478" width="789"]]
162 162  
163 163  
164 -
165 165  == 2.3  Plot Chart for sensors ==
166 166  
167 167  
... ... @@ -170,18 +170,12 @@
170 170  
171 171  [[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519152802-16.png?rev=1.1||alt="image-20220519152802-16.png"]]
172 172  
173 -
174 -
175 -(% style="color:blue" %)**1. Click Install
146 +~1. Click Install
176 176  2. Search the dashboard
177 -3. Click Install**
148 +3. Click Install
178 178  
150 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519152956-17.png?rev=1.1||alt="image-20220519152956-17.png"]]
179 179  
180 -
181 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519152956-17.png?rev=1.1||alt="image-20220519152956-17.png" height="763" width="835"]]
182 -
183 -
184 -
185 185  After the installation is successful, nodered will show the following node icon
186 186  
187 187  [[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519153335-19.png?rev=1.1||alt="image-20220519153335-19.png"]]
... ... @@ -197,77 +197,53 @@
197 197  
198 198  The demo uses 3 kinds. Voltage, temperature, humidity
199 199  
167 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519154521-20.png?rev=1.1||alt="image-20220519154521-20.png"]]
200 200  
201 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519154521-20.png?rev=1.1||alt="image-20220519154521-20.png" height="242" width="743"]]
202 -
203 -
204 -
205 205  double click function
206 206  
171 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519154640-21.png?rev=1.1||alt="image-20220519154640-21.png"]]
207 207  
208 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519154640-21.png?rev=1.1||alt="image-20220519154640-21.png" height="549" width="749"]]
209 -
210 -
211 -
212 212  Adjusted to 3, because we need to display 3 charts
213 213  
175 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519154812-22.png?rev=1.1||alt="image-20220519154812-22.png"]]
214 214  
215 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519154812-22.png?rev=1.1||alt="image-20220519154812-22.png" height="418" width="755"]]
216 216  
217 217  
218 -
219 219  === 2.3.2  the chart settings ===
220 220  
221 221  
222 222  Double-click while setting up the node as above
223 223  
184 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519160314-23.png?rev=1.1||alt="image-20220519160314-23.png"]]
224 224  
225 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519160314-23.png?rev=1.1||alt="image-20220519160314-23.png" height="703" width="729"]]
186 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519160412-24.png?rev=1.1||alt="image-20220519160412-24.png"]]
226 226  
188 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519160759-27.png?rev=1.1||alt="image-20220519160759-27.png"]]
227 227  
228 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519160412-24.png?rev=1.1||alt="image-20220519160412-24.png" height="501" width="727"]]
190 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519161326-30.png?rev=1.1||alt="image-20220519161326-30.png"]]
229 229  
192 +[[image:image-20220525185746-2.png]]
230 230  
231 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519160759-27.png?rev=1.1||alt="image-20220519160759-27.png" height="554" width="722"]]
194 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519161650-32.png?rev=1.1||alt="image-20220519161650-32.png"]]
232 232  
233 -
234 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519161326-30.png?rev=1.1||alt="image-20220519161326-30.png" height="444" width="721"]]
235 -
236 -
237 -[[image:image-20220525185746-2.png||height="421" width="724"]]
238 -
239 -
240 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519161650-32.png?rev=1.1||alt="image-20220519161650-32.png" height="722" width="726"]]
241 -
242 -
243 -
244 244  After the display interface is defined for the first time, subsequent charts can directly select the display interface
245 245  
198 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519162039-34.png?rev=1.1||alt="image-20220519162039-34.png"]]​​​​​​
246 246  
247 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519162039-34.png?rev=1.1||alt="image-20220519162039-34.png" height="644" width="724"]]
200 +[[image:image-20220525190106-3.png]]
248 248  
249 -​​​​​​
250 -
251 -[[image:image-20220525190106-3.png||height="575" width="724"]]
252 -
253 -
254 -
255 255  Connect graph nodes to functions with lines
256 256  
257 257  Click to deploy
258 258  
206 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519162412-36.png?rev=1.1||alt="image-20220519162412-36.png"]]
259 259  
260 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519162412-36.png?rev=1.1||alt="image-20220519162412-36.png" height="256" width="726"]]
261 -
262 262  Enter the server public IP + port 1880/ui
263 263  
264 264  example：[[http:~~/~~/xxx.xx.xx.xx:1880/ui>>url:http://119.91.62.30:1880/ui/#!/18?socketid=WY1MCE0RFEKHey8KAADj]]
265 265  
212 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519163141-37.png?rev=1.1||alt="image-20220519163141-37.png"]]
266 266  
267 -
268 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/node_red%20usage%20example/WebHome/image-20220519163141-37.png?rev=1.1||alt="image-20220519163141-37.png" height="203" width="735"]]
269 -
270 -
271 271  At this point, the basic demonstration of nodered is completed. If you need to beautify the chart and various visualizations, you can go to the official documentation of nodered for further understanding.
272 272  
273 273  
... ... @@ -275,30 +275,27 @@
275 275  == 2.4  Store Value ==
276 276  
277 277  
278 -Regarding storage, we recommend two ways.
221 +Regarding storage, we recommend two ways
279 279  
280 280  
281 281  
282 282  === 2.4.1  1. Generate txt document directly ===
283 283  
227 +Sample JSON file:链接转到示例JSON文件[[image:image-20220713102658-1.png]]
284 284  
285 -Sample JSON file:链接转到示例JSON文件
286 286  
287 -[[image:image-20220713102658-1.png||height="346" width="728"]]
288 288  
289 -
290 -
291 291  === 2.4.2  2. Use sqlite database ===
292 292  
293 293  
294 -==== (% style="color:blue" %)**1.  Install SQLite**(%%) ====
234 +==== **1.  Install SQLite** ====
295 295  
296 296  
297 -[[image:image-20220713111030-2.png||height="438" width="739"]]
237 +[[image:image-20220713111030-2.png]]
298 298  
299 299  
300 300  
301 -==== (% style="color:blue" %)**2.  After the installation is successful, the nodes in the picture will appear**(%%) ====
241 +==== **2.  After the installation is successful, the nodes in the picture will appear** ====
302 302  
303 303  
304 304  [[image:image-20220713111200-3.png]]
... ... @@ -305,57 +305,50 @@
305 305  
306 306  
307 307  
308 -==== (% style="color:blue" %)**3.  Import sample flow**(%%) ====
248 +==== **3.  Import sample flow** ====
309 309  
310 310  
311 -Refer to the import example below to import the sqlite example flow
251 +== 2.5  Email Notification ==
312 312  
313 -Download sample JSON file link: 链接
314 314  
315 315  
255 += 3.  Input Flow =
316 316  
317 -= 3.  Import Input Flow for Dragino Sensors =
318 318  
258 +Directly import JSON files to generate flow
319 319  
320 -Dragino provides input flow examples for the sensors.
260 +Download the required JSON file through this link: 提供一个链接
321 321  
322 -User can download the required JSON file through [[Dragino Node-RED input flow template>>https://github.com/dragino/dragino-end-node-decoder]].
262 +Take LHT65 as an example  (this node is already registered with TTN,MQTT protocol to connect)
323 323  
324 -Take LHT65 as an example  (Assume this node is already registered with TTN, MQTT protocol to connect)
325 -
326 326  [[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524175748-3.png?rev=1.1||alt="image-20220524175748-3.png"]]
327 327  
328 328  [[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524175814-4.png?rev=1.1||alt="image-20220524175814-4.png"]]
329 329  
330 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524175914-5.png?rev=1.1||alt="image-20220524175914-5.png" height="443" width="773"]]
268 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524175914-5.png?rev=1.1||alt="image-20220524175914-5.png"]]
331 331  
332 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524175935-6.png?rev=1.1||alt="image-20220524175935-6.png" height="568" width="768"]]
270 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524175935-6.png?rev=1.1||alt="image-20220524175935-6.png"]]
333 333  
334 334  After the import is successful, change the MQTT in node to your TTN information
335 335  
336 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524184449-1.png?rev=1.1||alt="image-20220524184449-1.png" height="643" width="772"]]
274 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524184449-1.png?rev=1.1||alt="image-20220524184449-1.png"]]
337 337  
338 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524184521-2.png?rev=1.1||alt="image-20220524184521-2.png" height="648" width="773"]]
276 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524184521-2.png?rev=1.1||alt="image-20220524184521-2.png"]]
339 339  
340 -
341 -
342 342  Configure information consistent with your TTN
343 343  
344 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524184722-3.png?rev=1.1||alt="image-20220524184722-3.png" height="349" width="758"]]
280 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524184722-3.png?rev=1.1||alt="image-20220524184722-3.png"]]
345 345  
346 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524192830-4.png?rev=1.1||alt="image-20220524192830-4.png" height="376" width="758"]]
282 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524192830-4.png?rev=1.1||alt="image-20220524192830-4.png"]]
347 347  
348 -
349 -
350 350  API keys generated by the password for you
351 351  
352 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524193028-5.png?rev=1.1||alt="image-20220524193028-5.png" height="370" width="759"]]
286 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524193028-5.png?rev=1.1||alt="image-20220524193028-5.png"]]
353 353  
354 -
355 355  Topic modify it to the following format
356 356  
357 357  v3/(% style="color:red" %)Application ID(%%)@ttn/devices/(% style="color:red" %)End device ID(%%)/up
358 358  
359 -[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524193258-6.png?rev=1.1||alt="image-20220524193258-6.png" height="690" width="755"]]
292 +[[image:http://8.211.40.43:8080/xwiki/bin/download/Main/Node-RED/Directly%20import%20JSON%20files%20to%20generate%20flow/WebHome/image-20220524193258-6.png?rev=1.1||alt="image-20220524193258-6.png"]]
360 360  
361 361  After the modification is completed, click Deploy

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