require('serialport')报错

2024-08-28

Node.js 串口通讯 node-serialport 使用说明

官网:https://serialport.io/en/ 安装:npm install serialport Parsers说明:parser-byte-length:大概意思是定义了一个长度为length字节的buffer,串口收到数据后先放到buffer中,放满了才发送给程序,超出的部分等buffer发送清空后继续放入parser-cctalk:一种在货币交易等行业广泛使用的串行协议parser-delimiter:意思是遇到某个字符时才把buffer中的数据发给程序,比如设为'a',那么用

openresty package.path require 报错

在文件中 package.path = '/usr/local/share/lua/5.1/?.lua;/usr/local/openresty/lualib/resty/?.lua;' package.cpath = '/usr/local/lib/lua/5.1/?.so;' 执行local mysql = require "mysql" --正确local mysql = require "resty.mysql" --报错去掉 package.path =

npm不能安装任何包，报错：npm WARN onload-script failed to require onload script npm-autoinit/autoinit及解决方法

想要利用Hexo搭建一个博客,但是安装时npm一直报错,不仅仅是Hexo包,连别的其他包也不行,会提示下面的一堆错误 npm WARN onload-script failed to require onload script npm-autoinit/autoinit npm WARN onload-script failed to require onload script npm-autoinit/autoinit npm WARN onload-script Error: Cannot

redis-trib.rb报错:/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- redis (LoadError)

报错如下: /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- redis (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from /opt/cluster_test/redis-unstable/src/redis-trib.rb:25:in `<main>

【spring cloud】spring cloud打包最外层项目报错：'packaging' with value 'jar' is invalid. Aggregator projects require 'pom' as packaging. @ line 9, column 13

OK,spring cloud项目,最外层的父级项目在打包的时候,报错如下: "C:\Program Files\Java\jdk1.8.0_131\bin\java" -Dmaven.multiModuleProjectDirectory=D:\apps\ideaProjects\springcloud -Dmaven.home=D:\apps\apache-maven-3.5.0 -Dclassworlds.conf=D:\apps\apache-maven-3.5.0\bin\m

安装scount的es驱动,composer require tamayo/laravel-scout-elastic报错解决

执行 composer require tamayo/laravel-scout-elastic 报错信息如下: Problem 1 - Installation request for tamayo/laravel-scout-elastic ^4.0 -> satisfiable by tamayo/laravel-scout-elastic[4.0.0]. - tamayo/laravel-scout-elastic 4.0.0 requires laravel/scout ^5.0 ->

electron中JS报错：require is not defined的问题解决方法

Electron已经发布了6.0正式版,升级后发现原来能运行的代码报错提示require is not defined 解决办法: 修改创建BrowserWindow部分的相关代码,设置属性webPreferences.nodeIntegration为 true let win = new BrowserWindow({ webPreferences: { nodeIntegration: true } }) 在原有的new BrowserWindow基础上加入 webPreferences:

kubelet拉取pause镜像报错pull access denied for 172.20.59.190:81/kubernetes/pause-amd64, repository does not exist or may require 'docker login': denied

目录 1 背景说明 2 现象 pod无法启动,一直显示ContainerCreating 3 问题分析 kubelet的启动参数如下 4 尝试的解决方法 4.1 本地docker login登录镜像仓库,通过docker pull拉取该pause镜像,可以解决该问题(需要所有的node都将pause缓存到本地) 4.2 配置docker-registry secret,在pod的yaml文件中,配置imagePullSecrets来使用该secret,创建pod,仍然报这个错误 4.3 修改ha

docker中pull镜像，报错 pull access denied for ubantu, repository does not exist or may require 'docker login'

报错说明:拒绝获取ubantu, 仓库不存在或者需要登录docker 1.先尝试注册docker 2.在拉镜像前,先登录docker, 命令:docker login 3.然后执行 docker image pull ubantu 依然报错,仓库不存在或者需要登录docker. 4. docker seacher ubantu , 查找版本 5. docker image pull oumuv/ubantu

electron串口通信使用serialport安装报错

1.报错信息没有安装python环境 1 gyp ERR! find Python 2 gyp ERR! find Python Python is not set from command line or npm configuration 3 gyp ERR! find Python Python is not set from environment variable PYTHON 4 gyp ERR! find Python checking if "python" can b

PHPmailer关于Extension missing: openssl报错的解决

最近在写一个网页的时候,需要用到PHPmailer来发送邮件,按照官网上给出的demo写出一个例子,却报错Extension missing: openssl 最后发现需要修改php.ini中的配置: 将其中的 extension=php_openssl.dll 打开即可. demo代码添加如下: <?php require 'PHPMailerAutoload.php'; $mail = new PHPMailer; //$mail->SMTPDebug = 3; // Enable ver

VS2015+Win10 调试DirectX 报错

安装完Win10调试程序突然在这个地方报错: #if (defined(DEBUG) || defined(_DEBUG)) deviceFlags |= D3D11_CREATE_DEVICE_DEBUG; #endif /* (defined(DEBUG) || defined(_DEBUG)) */ 错误信息如下: D3D11CreateDevice: Flags (0x2) were specified which require the D3D11 SDK Layers for W

composer 报错：Your requirements could not be resolved to an installable set of packages 解决方法

composer 报错: - Your requirements could not be resolved to an installable set of packages xxxxxxxxxxxxxxxxxxxxxx-> no matching package found. xxxxxxxxxxxxxxxxxxxxxx-> no matching package found. Potential causes: - A typo in the package name - The pac

window7下安装第三方包报错及解决

window7 64位下安装第三方包,,比如安装yaml的exe执行文件,会报错及解决:python version 2.7(3.4) required,which was not found in the registry 方法:新建一个register.py 文件,把一下代码贴进去,保存 # # script to register Python 2.0 or later for use with win32all # and other extensions that require P

在Linux上配置xampp后远程访问域名报错

在Linux上配置xampp后远程访问域名报错: New XAMPP security concept: Access to the requested object is only available from the local network. This setting can be configured in the file "httpd-xampp.conf". 初步分析了一下错误原因是:安全异常,需要修改httpd-xampp.conf.这个文件在:/opt/lampp/

angularJS 报错： [ngModel:numfmt] http://errors.angularjs.org/1.4.1/ngModel/numfmt?p0=333

<!doctype html> <html ng-app="a10086"> <head> <meta charset="utf-8"> <script src="angular.min.js"></script> </head> <body> <pre> stringToNumber2 指令中这么写没问题, 但是html中调用也这么写,h

gulp-notify处理报错----gulp系列（二)

上一节,以less为例,入门了gulp,并为任务结构做了抽离. 前端们,gulp该用起来了,简单的demo入门——gulp系列(一) 本节学习下gulp-notify,官方这样解释的: gulp-notify : gulp plugin to send messages based on Vinyl Files or Errors to Mac OS X, Linux or Windows using the node-notifier module. Fallbacks to Growl or

node.js创建服务器报错

创建nodeTest.js如下: var http = require('http'); http.createServer(function (request, response){ response.writeHead(200, {'Content-Type' : 'text/plain'}); response.end('hello world\n'); }).listen(80); console.log('server running at http://127.0.0.1:80');

解决脱离rails使用activerecord报错 NameError: uninitialized constant ActiveRecord::Migrator::Zlib

上下文说明原本系统是15.10,无奈只支持1年,所以今天升级16.04,环境答好后运行rake migratte报错 task :default => :migrate desc 'Run migrations' task :migrate do ActiveRecord::Migrator.migrate('db/migrate', ENV['VERSION'] ? ENV['VERSION'].to_i : nil) end NameError: uninitialized constan

关于报错:'sharedApplication' is unavailable: not available on iOS (App Extension) - Use view controller based

最近在看Extension相关知识的时候,自己写了个小demo 发现[UIApplication sharedApplication]这个方法敲不出来了, 总是报错:'sharedApplication' is unavailable: not available on iOS (App Extension) - Use view controller based..... 在网上找了一些觉得办法,大多都是在说把cocoapods卸载了重装的但很明显我的问题不是由于这个原因导致的然后我问

为什么报错说req未定义，createServer只接受匿名函数吗？

var http = require('http');var server = new http.createServer(handlerRequest(req,res));server.listen(8888);function handlerRequest(req,res){ res.end('hellow');}为什么报错说req未定义,createServer只接受匿名函数吗?

require('serialport')报错

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