modbus-RTU报文结构 const buffer = Buffer.from(msg.payload , 'hex'); const array = Array.from(buffer); temperature=buffer.readInt16BE(3)/10 //温度 humidity=buffer.readInt16BE(5)/10 //湿度 msg["temperature"]=temperature msg["humidity"]=humidityreturn msg;串口监控配置，需设置闲置时间 ...
问node.js节点-red-将Base64字符串转换为uint8arrayEN直接上代码： var img = "imgurl";//imgurl ...
Windows安装NODE-RED 安装NODE.JS 安装node-red 安装NODE.JS 下载node.js: node. 按照下图选择,安装其他版本可以点击 其他版本. 一直下一步进行安装。 配置环境变量 打开CMD 输入 到这里node已经安装完成,接下来进行node-red安装 安装node-red 设置npm镜像,因为国内没有服务器,npm install -g cnpm &nda... ...
以下代码以数组的形式读取日志文件,计算出七天前的 UNIX 日期代码,然后循环访问日志文件中的最后七个时间戳。 12345678910111213141516171819202122232425//Turn incoming timestamps log into an array:var exercisearray = msg.payload.split("\n");if (exercisearray.slice(-1)[0] === "") exercisearray.length =...
Buffer.from(array):返回一个呗array的值初始化的新的Buffer实例(传入的array的元素只能是数字,不然就会自动被0覆盖)。 Buffer.from(arrayBuffer[,byteOffset[,length]]):返回一个新建的与给定的ArrayBuffer共享同一内存的Buffer。 更多内容可以参看:https://nodejs.org/api/buffer.html#static-method-bufferfromarray...
This node should receive an array with the accounts configurations frommsg.configs. Example: msg.configs = [ {...config1}, {...config2} ] Outputs The first output is a success message containing an object ready for REST call with token and contact The second output is a monitor message ...
大街网招聘信息另外,虽然名为数组(array),但是其边的元素并不是数字,⽽是msg对象,所以,更贴切的叫法应该是:对象组。 这个例⼦代码如下: 5.2.3通过判断语句进⾏数据分类returnmsg;//⼀个返回值 return[[msg1,msg2,msg3],msg4];//⼀组返回值 ...
A custom function is given an array ofvalues. The function should return reduced state forthing. CommandsOptional. Special actions to take when handling commands. Any command not listed is processed as thethingitselfandpasses tochildren. You can disable broadcast tochildrenhere. ...
()-sixdays //Iterate and count past week of exercisevar count = 0var secondsinday = 60*24*7for (var i=1; i<8; i++) { if (i>exercisearray.length) break; var testval = parseInt(exercisearray.slice(-i)[0]); if (testval >= oneweekago) ++count;} //Store our answer as the...
constbuffer=Buffer.from(msg.payload,'hex');constarray=Array.from(buffer);temperature=buffer.readInt16BE(3)/10//温度humidity=buffer.readInt16BE(5)/10//湿度msg["temperature"]=temperature msg["humidity"]=humidityreturnmsg; 1. 2. 3.