串口测试工具是通的但是node-red就是不出现数据,这是因为在发送命令的时候“LON”为触发命令 他后面有个空格符号所以在node-red里面不触发命令的原因。 基恩士,里面设置列表里把“终端”里的默认0D删掉试试看这里OD就是回车 也可能是你串口调试助手自带的回车 [{"id":"bbee4ee807b002da","type":"ui_but
String.prototype.toHex = function () { var self = this, hex, regex = /\(([^)]+)\)/, rgb = regex.exec(self)[1].split(','), red = parseInt(rgb[0]), green = parseInt(rgb[1]), blue = parseInt(rgb[2]); function toHEX(r, g, b) { r = r.toString(16).length ==1 ?
const crypto = require('node:crypto'); // Hashing a string and return the result as a hex-encoded string. const string = 'Node.js'; // 10b3493287f831e81a438811a1ffba01f8cec4b7 console.log(crypto.hash('sha1', string)); 参考https://nodejs.org/en/blog/release/v21.7.0 本文参与...
New feature msg.payload.range can be used to read/write part of Array Fix: FQDN -> hostname in makeAplicationUri EventId and statustext as clear string EventId as hex string v0.2.108 and older Fixed support for server Array variables ...
command(nameAndArgs: string, description: string, opts?: ExecutableCommandOptions): this;/*** 创建新的独立 command 的工厂例程。** 有关创建附加子命令的信息,请参见`.command()',该子命令使用此例程来创建命令。您可以覆盖 createCommand 来定制子命令。*/ ...
Buffer VS String 面试指南 缓冲(Buffer)与缓存(Cache)的区别?,参考:# Buffer初识 在引入 TypedArray 之前,JavaScript 语言没有用于读取或操作二进制数据流的机制。 Buffer 类是作为 Node.jsAPI的一部分引入的,用于在TCP流、文件系统操作、以及其他上下文中与八位字节流进行交互。这是来自 Node.js 官网的一段描述...
fs.readFile 和 fs.createReadStream分别读200MB的文件,对比内存使用情况,来聊聊为什么node需要引入Buffer和Stream;接着会聊四类Stream、stream的highWaterMark和“背压问题”、Buffer的基本操作及一些应用场景、Buffer的内存分配和Buffer 编码乱码问题,最后会说一下一些易混淆的概念:Buffer vs Cache、Buffer vs String。
to a javascript float. The following may be given in msg.payload: A string representing a number, which may be hex or binary examples, "1735" "0x02045789" 0b01000000010010010000111111011011 An integer value A two element array or buffer of 16 bit values, less significant byte first. ...
npm i node-red-contrib-web-worldmap Usage Plots "things" on a map. By default the map will be served from{httpRoot}/worldmap, but this can be changed in the configuration panel. Use keyboard shortcut⌘⇧m,ctrl-shift-mto jump to the map. ...
New feature msg.payload.range can be used to read/write part of Array Fix: FQDN -> hostname in makeAplicationUri EventId and statustext as clear string EventId as hex string v0.2.108 and older Fixed support for server Array variables Browse will create topic and datatype thus output can ...