生成重复 http 请求的 nodejs

Question

我正在使用本SAP教程中的以下nodejs代码来读取每个HTTP发布的传感器值。一切正常，但事实上每条记录都发布了两次(见屏幕截图)。我不精通服务器端JS，也不知道为什么重复。同意，值并不总是相同的，但为了进一步处理，我希望每个时间戳都有一个数据集。有人可以帮我找到问题，如果可能的话，提供解决方案/解决方法吗？

此外，该脚本每 10 秒读取和传输一次数据。

有没有办法将间隔设置为 3 分钟？

我也很感激这里的每一点帮助。

/*     sensorTag IR Temperature sensor example
*  Craig Cmehil, SAP SE (c) 2015
*/
/* Choose the proper HTTP or HTTPS, SAP Cloud Platform requires HTTPS */
var http = require('https');
var SensorTag = require('sensortag');
var lv_temp;
var lv_humid;
var lv_deviceid = "";
var DEBUG_VALUE = true;
var xtimestamp;
var date = new Date();
var time = date.getTime ();
// SAP Cloud Platform connection details
var portIoT = 443;
var pathIoT = '/com.sap.iotservices.mms/v1/api/http/data/';
var hostIoT = 'iotmmsXXXXXXXXXXtrial.hanatrial.ondemand.com';
var authStrIoT = 'Bearer XXXXXXXXXXXX';
var deviceId = 'XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXX';
var messageTypeID = 'XXXXXXXXXXXX';
var options = {
host: hostIoT,
port: portIoT,
path: pathIoT + deviceId,
agent: false,
headers: {
'Authorization': authStrIoT,
'Content-Type': 'application/json;charset=utf-8',
'Accept': '*/*'
},
method: 'POST',     
};
/***************************************************************/
/* Coding to access TI SensorTag and values of various sensors */
/***************************************************************/
console.log("If not yet activated, then press the power button.");
SensorTag.discover(function(tag) {
tag.on('disconnect', function() {
console.log('disconnected!');
process.exit(0);
});
function connectExecute() {
console.log('Connect Device and Execute Sensors');
tag.connectAndSetUp(enableSensors);
}
function enableSensors() {
/* Read device specifics */
tag.readDeviceName(function(error, deviceName) {
console.log('Device Name = ' + deviceName);
});
tag.readSystemId(function(error, systemId) {
console.log('System ID = ' + systemId);
lv_deviceid = systemId;
});
tag.readSerialNumber(function(error, serialNumber) {
console.log('Serial Number = ' + serialNumber);
});
tag.readFirmwareRevision(function(error, firmwareRevision) {
console.log('Firmware Rev = ' + firmwareRevision);
});
tag.readHardwareRevision(function(error, hardwareRevision) {
console.log('Hardware Rev = ' + hardwareRevision);
});
tag.readHardwareRevision(function(error, softwareRevision) {
console.log('Software Revision = ' + softwareRevision);
});
tag.readManufacturerName(function(error, manufacturerName) {
console.log('Manufacturer = ' + manufacturerName);
});
/* Enable Sensors */
console.log("Enabling sensors:");
console.log('tenableIRTemperatureSensor');
tag.enableIrTemperature(notifyMe);
console.log('tenableHumidity');
tag.enableHumidity(notifyMe);
console.log("*********************************************");
console.log(" To stop press both buttons on the SensorTag ");
console.log("*********************************************");
}
function notifyMe() {
tag.notifySimpleKey(listenForButton);
setImmediate(function loop () {
tag.readIrTemperature(function(error, objectTemperature, ambientTemperature){
lv_obj = objectTemperature.toFixed(1);
lv_ambient = ambientTemperature.toFixed(1);
});
tag.readHumidity(function(error, temperature, humidity) {
lv_temp = temperature.toFixed(1);
lv_humid = humidity.toFixed(1);
});
if(DEBUG_VALUE)
console.log("Sending Data: " + lv_deviceid + " " + lv_temp + " " + lv_humid);
setSensorData(lv_temp, lv_humid);
setTimeout(loop, 10000);
});
}
function listenForButton() {
tag.on('simpleKeyChange', function(left, right) {
if (left && right) {
tag.disconnect();
}
});
}
connectExecute();
});
/******************************************************************/
/* FUNCTION to get Temperature from the Sensor & update into HANA */
/******************************************************************/
function setSensorData(lv_temp,lv_humid){
date = new Date();
time =date.getTime();
var data = {
"mode":"sync",
"messageType": messageTypeID,
"messages": [{
"timestamp": time,
"temperature": lv_temp,
"humidity": lv_humid
}]
};
var strData = JSON.stringify(data);
if(DEBUG_VALUE)
console.log("Data: " + strData);
if(strData.length > 46){
if(DEBUG_VALUE)
console.log("Sending Data to server");
/* Process HTTP or HTTPS request */
options.agent = new http.Agent(options);
var request_callback = function(response) {
var body = '';
response.on('data', function (data) {
body += data;
});
response.on('end', function () {
if(DEBUG_VALUE)
console.log("REQUEST END:", response.statusCode);
});
response.on('error', function(e) {
console.error(e);
});    
}
var request = http.request(options, request_callback);
request.on('error', function(e) {
console.error(e);
});
request.write(strData);
request.end();
}else{
if(DEBUG_VALUE)
console.log("Incomplete Data");
}
}

Answer 1

它应该只发布一次到系统，但两次发布到屏幕。

在函数通知我中，您需要更改行

setTimeout(loop， 10000);

将号码更改为您希望它延迟的间隔，然后再再次发布。