场景

Node-RED中使用json节点解析JSON数据：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/124188611

在上面的基础上怎样解析json数据显示天气资料仪表盘。

这里获取天气的json数据从高德开放平台获取

https://lbs.amap.com/api/webservice/guide/api/weatherinfo#weatherinfo

注册并申请自己的key,可以先在浏览器中访问数据。

注：

博客：
https://blog.csdn.net/badao_liumang_qizhi
关注公众号
霸道的程序猿
获取编程相关电子书、教程推送与免费下载。

实现

1、拖拽一个http请求并编辑

2、编辑json解析组件，选择JSON字符串与对象互转

3、然后拖拽change组件并编辑

获取对应数据结构的天气描述

4、拖拽text组件用来显示天气描述

5、拖拽仪表盘组件并编辑，仪表盘参考如下

Node-RED安装图形化节点dashboard实现订阅mqtt主题并在仪表盘中显示温度：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/121992760

6、效果

7、Json数据

[
{
"id": "f4a4d8eab7935bc8",
"type": "tab",
"label": "流程 3",
"disabled": false,
"info": "",
"env": []
},
{
"id": "c428312d1f6165d1",
"type": "mqtt-broker",
"name": "mqtt",
"broker": "127.0.0.1",
"port": "1883",
"clientid": "",
"autoConnect": true,
"usetls": false,
"protocolVersion": "4",
"keepalive": "60",
"cleansession": true,
"birthTopic": "",
"birthQos": "0",
"birthPayload": "",
"birthMsg": {},
"closeTopic": "",
"closeQos": "0",
"closePayload": "",
"closeMsg": {},
"willTopic": "",
"willQos": "0",
"willPayload": "",
"willMsg": {},
"sessionExpiry": ""
},
{
"id": "51eee50b4ec9422f",
"type": "ui_group",
"name": "dashboardDemo",
"tab": "29ae4c620f43ee0d",
"order": 1,
"disp": true,
"width": "6",
"collapse": false,
"className": ""
},
{
"id": "29ae4c620f43ee0d",
"type": "ui_tab",
"name": "Home",
"icon": "dashboard",
"disabled": false,
"hidden": false
},
{
"id": "a506c767a5c1edbd",
"type": "ui_base",
"theme": {
"name": "theme-light",
"lightTheme": {
"default": "#0094CE",
"baseColor": "#0094CE",
"baseFont": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif",
"edited": true,
"reset": false
},
"darkTheme": {
"default": "#097479",
"baseColor": "#097479",
"baseFont": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif",
"edited": false
},
"customTheme": {
"name": "Untitled Theme 1",
"default": "#4B7930",
"baseColor": "#4B7930",
"baseFont": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif"
},
"themeState": {
"base-color": {
"default": "#0094CE",
"value": "#0094CE",
"edited": false
},
"page-titlebar-backgroundColor": {
"value": "#0094CE",
"edited": false
},
"page-backgroundColor": {
"value": "#fafafa",
"edited": false
},
"page-sidebar-backgroundColor": {
"value": "#ffffff",
"edited": false
},
"group-textColor": {
"value": "#1bbfff",
"edited": false
},
"group-borderColor": {
"value": "#ffffff",
"edited": false
},
"group-backgroundColor": {
"value": "#ffffff",
"edited": false
},
"widget-textColor": {
"value": "#111111",
"edited": false
},
"widget-backgroundColor": {
"value": "#0094ce",
"edited": false
},
"widget-borderColor": {
"value": "#ffffff",
"edited": false
},
"base-font": {
"value": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif"
}
},
"angularTheme": {
"primary": "indigo",
"accents": "blue",
"warn": "red",
"background": "grey",
"palette": "light"
}
},
"site": {
"name": "Node-RED Dashboard",
"hideToolbar": "false",
"allowSwipe": "false",
"lockMenu": "false",
"allowTempTheme": "true",
"dateFormat": "DD/MM/YYYY",
"sizes": {
"sx": 48,
"sy": 48,
"gx": 6,
"gy": 6,
"cx": 6,
"cy": 6,
"px": 0,
"py": 0
}
}
},
{
"id": "248cbbb0.18e794",
"type": "ui_group",
"name": "MyGroup",
"tab": "3f79c420.cfc1bc",
"order": 1,
"disp": true,
"width": "6",
"collapse": false
},
{
"id": "3f79c420.cfc1bc",
"type": "ui_tab",
"name": "Home",
"icon": "dashboard",
"disabled": false,
"hidden": false
},
{
"id": "a0954be5.a7f7e8",
"type": "ui_group",
"name": "MyInput",
"tab": "3f79c420.cfc1bc",
"order": 2,
"disp": true,
"width": "6",
"collapse": false
},
{
"id": "508bd6f8398ab80f",
"type": "ui_group",
"name": "OpenWeatherMap",
"tab": "3f79c420.cfc1bc",
"order": 3,
"disp": true,
"width": "6",
"collapse": false
},
{
"id": "3a119cb540f23194",
"type": "http request",
"z": "f4a4d8eab7935bc8",
"name": "",
"method": "GET",
"ret": "txt",
"paytoqs": "ignore",
"url": "https://restapi.amap.com/v3/weather/weatherInfo?city=370200&key=你自己申请的key",
"tls": "",
"persist": false,
"proxy": "",
"authType": "",
"senderr": false,
"x": 320,
"y": 200,
"wires": [
[
"955652a1f601d333"
]
]
},
{
"id": "4a1f7982bbb68198",
"type": "inject",
"z": "f4a4d8eab7935bc8",
"name": "",
"props": [
{
"p": "payload"
},
{
"p": "topic",
"vt": "str"
}
],
"repeat": "300",
"crontab": "",
"once": false,
"onceDelay": "",
"topic": "",
"payload": "",
"payloadType": "date",
"x": 180,
"y": 200,
"wires": [
[
"3a119cb540f23194"
]
]
},
{
"id": "955652a1f601d333",
"type": "json",
"z": "f4a4d8eab7935bc8",
"name": "",
"property": "payload",
"action": "",
"pretty": false,
"x": 450,
"y": 200,
"wires": [
[
"8ba9a66cc1efa19a",
"a387539f2dbf1dcc"
]
]
},
{
"id": "8ba9a66cc1efa19a",
"type": "change",
"z": "f4a4d8eab7935bc8",
"name": "Set Description",
"rules": [
{
"t": "set",
"p": "payload",
"pt": "msg",
"to": "payload.lives[0].weather",
"tot": "msg"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 620,
"y": 200,
"wires": [
[
"4e8cf314d127cbcf"
]
]
},
{
"id": "4e8cf314d127cbcf",
"type": "ui_text",
"z": "f4a4d8eab7935bc8",
"group": "508bd6f8398ab80f",
"order": 3,
"width": 0,
"height": 0,
"name": "",
"label": "天氣描述: ",
"format": "{{msg.payload}}",
"layout": "row-spread",
"className": "",
"x": 780,
"y": 200,
"wires": []
},
{
"id": "a387539f2dbf1dcc",
"type": "change",
"z": "f4a4d8eab7935bc8",
"name": "Set Temp",
"rules": [
{
"t": "set",
"p": "payload",
"pt": "msg",
"to": "payload.lives[0].temperature",
"tot": "msg"
}
],
"action": "",
"property": "",
"from": "",
"to": "",
"reg": false,
"x": 600,
"y": 260,
"wires": [
[
"2b38a29dfeaed3e4"
]
]
},
{
"id": "2b38a29dfeaed3e4",
"type": "ui_gauge",
"z": "f4a4d8eab7935bc8",
"name": "",
"group": "508bd6f8398ab80f",
"order": 4,
"width": 0,
"height": 0,
"gtype": "gage",
"title": "溫度: ",
"label": "units",
"format": "{{value}}",
"min": 0,
"max": "50",
"colors": [
"#00b500",
"#e6e600",
"#ca3838"
],
"seg1": "",
"seg2": "",
"className": "",
"x": 770,
"y": 260,
"wires": []
}
]