very new to the JavaScript world. I am trying to modify this js file to write data a CSV file. This code is available as a Package on GitHub, but I want to take it a step further by collected the data.
How do get this code to write the data, it creates the data, but I not sure how to get it constantly write the data received.
Here is the Code - you can see my attempt to write the data at the end of the code. Any help would be very much appreciated, have done a lot of research, but just can get this to come together.
I tried about everything I can find on the web on how to write data, all the examples I see are showing hard data to be written to the csv file, I want to capture the data from all the variables in the code and write all the lines of data to the csv file.
Thank you
var PORT = 20127;
var HOST = '192.168.xx.xx';
const express = require('express');
const app = express();
//used to write to the csv file
const fs = require('fs');
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "\*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
next();
});
var dgram = require('dgram');
var server = dgram.createSocket('udp4');
let obj = {};
server.on('listening', function () {
var address = server.address();
console.log('UDP Server listening on ' + address.address + ":" + address.port);
});
server.on('message', function (message, remote) {
let jump = 0;
obj.isRaceOn = message.readInt32LE(jump);
jump += 4;
obj.timestampMS = message.readUInt32LE(jump); //Getting wrong data
jump += 4;
obj.engineMaxRpm = message.readFloatLE(jump);
jump += 4;
obj.engineIdleRpm = message.readFloatLE(jump);
jump += 4;
obj.currentEngineRpm = message.readFloatLE(jump);
jump += 4;
obj.accelerationX = message.readFloatLE(jump); //In the car's local space; X = right, Y = up, Z = forward
jump += 4;
obj.accelerationY = message.readFloatLE(jump);
jump += 4;
obj.accelerationZ = message.readFloatLE(jump);
jump += 4;
obj.velocityX = message.readFloatLE(jump); //In the car's local space; X = right, Y = up, Z = forward
jump += 4;
obj.velocityY = message.readFloatLE(jump);
jump += 4;
obj.velocityZ = message.readFloatLE(jump);
jump += 4;
obj.angularVelocityX = message.readFloatLE(jump); //In the car's local space; X = pitch, Y = yaw, Z = roll
jump += 4;
obj.angularVelocityY = message.readFloatLE(jump);
jump += 4;
obj.angularVelocityZ = message.readFloatLE(jump);
jump += 4;
obj.yaw = message.readFloatLE(jump);
jump += 4;
obj.pitch = message.readFloatLE(jump);
jump += 4;
obj.roll = message.readFloatLE(jump);
jump += 4;
obj.normalizedSuspensionTravelFrontLeft = message.readFloatLE(jump); // Suspension travel normalized: 0.0f = max stretch; 1.0 = max compression
jump += 4;
obj.normalizedSuspensionTravelFrontRight = message.readFloatLE(jump);
jump += 4;
obj.normalizedSuspensionTravelRearLeft = message.readFloatLE(jump);
jump += 4;
obj.normalizedSuspensionTravelRearRight = message.readFloatLE(jump);
jump += 4;
obj.tireSlipRatioFrontLeft = message.readFloatLE(jump); // Tire normalized slip ratio, = 0 means 100% grip and |ratio| > 1.0 means loss of grip.
jump += 4;
obj.tireSlipRatioFrontRight = message.readFloatLE(jump);
jump += 4;
obj.tireSlipRatioRearLeft = message.readFloatLE(jump);
jump += 4;
obj.tireSlipRatioRearRight = message.readFloatLE(jump);
jump += 4;
obj.wheelRotationSpeedFrontLeft = message.readFloatLE(jump); // Wheel rotation speed radians/sec.
jump += 4;
obj.wheelRotationSpeedFrontRight = message.readFloatLE(jump);
jump += 4;
obj.wheelRotationSpeedRearLeft = message.readFloatLE(jump);
jump += 4;
obj.wheelRotationSpeedRearRight = message.readFloatLE(jump);
jump += 4;
obj.wheelOnRumbleStripFrontLeft = message.readFloatLE(jump); // = 1 when wheel is on rumble strip, = 0 when off.
jump += 4;
obj.wheelOnRumbleStripFrontRight = message.readFloatLE(jump);
jump += 4;
obj.wheelOnRumbleStripRearLeft = message.readFloatLE(jump);
jump += 4;
obj.wheelOnRumbleStripRearRight = message.readFloatLE(jump);
jump += 4;
obj.wheelInPuddleDepthFrontLeft = message.readFloatLE(jump); // = from 0 to 1, where 1 is the deepest puddle
jump += 4;
obj.wheelInPuddleDepthFrontRight = message.readFloatLE(jump);
jump += 4;
obj.wheelInPuddleDepthRearLeft = message.readFloatLE(jump);
jump += 4;
obj.wheelInPuddleDepthRearRight = message.readFloatLE(jump);
jump += 4;
obj.surfaceRumbleFrontLeft = message.readFloatLE(jump); // Non-dimensional surface rumble values passed to controller force feedback
jump += 4;
obj.surfaceRumbleFrontRight = message.readFloatLE(jump);
jump += 4;
obj.surfaceRumbleRearLeft = message.readFloatLE(jump);
jump += 4;
obj.surfaceRumbleRearRight = message.readFloatLE(jump);
jump += 4;
obj.tireSlipAngleFrontLeft = message.readFloatLE(jump); // Tire normalized slip angle, = 0 means 100% grip and |angle| > 1.0 means loss of grip.
jump += 4;
obj.tireSlipAngleFrontRight = message.readFloatLE(jump);
jump += 4;
obj.tireSlipAngleRearLeft = message.readFloatLE(jump);
jump += 4;
obj.tireSlipAngleRearRight = message.readFloatLE(jump);
jump += 4;
obj.tireCombinedSlipFrontLeft = message.readFloatLE(jump); // Tire normalized combined slip, = 0 means 100% grip and |slip| > 1.0 means loss of grip.
jump += 4;
obj.tireCombinedSlipFrontRight = message.readFloatLE(jump);
jump += 4;
obj.tireCombinedSlipRearLeft = message.readFloatLE(jump);
jump += 4;
obj.tireCombinedSlipRearRight = message.readFloatLE(jump);
jump += 4;
obj.suspensionTravelMetersFrontLeft = message.readFloatLE(jump); // Actual suspension travel in meters
jump += 4;
obj.suspensionTravelMetersFrontRight = message.readFloatLE(jump);
jump += 4;
obj.suspensionTravelMetersRearLeft = message.readFloatLE(jump);
jump += 4;
obj.suspensionTravelMetersRearRight = message.readFloatLE(jump);
jump += 4;
obj.carOrdinal = message.readInt32LE(jump); //Unique ID of the car make/model
jump += 4;
obj.carClass = message.readInt32LE(jump); //Between 0 (D -- worst cars) and 7 (X class -- best cars) inclusive
jump += 4;
obj.carPerformanceIndex = message.readInt32LE(jump); //Between 100 (slowest car) and 999 (fastest car) inclusive
jump += 4;
obj.drivetrainType = message.readInt32LE(jump); //Corresponds to EDrivetrainType; 0 = FWD, 1 = RWD, 2 = AWD
jump += 4;
obj.numCylinders = message.readInt32LE(jump); //Number of cylinders in the engine
jump += 4;
//Position (meters)
obj.positionX = message.readFloatLE(jump);
jump += 4;
obj.positionY = message.readFloatLE(jump);
jump += 4;
obj.positionZ = message.readFloatLE(jump);
jump += 4;
obj.speed = message.readFloatLE(jump); // meters per second
jump += 4;
obj.power = message.readFloatLE(jump); // watts
jump += 4;
obj.torque = message.readFloatLE(jump); // newton meter
jump += 4;
obj.tireTempFrontLeft = message.readFloatLE(jump);
jump += 4;
obj.tireTempFrontRight = message.readFloatLE(jump);
jump += 4;
obj.tireTempRearLeft = message.readFloatLE(jump);
jump += 4;
obj.tireTempRearRight = message.readFloatLE(jump);
jump += 4;
obj.boost = message.readFloatLE(jump);
jump += 4;
obj.fuel = message.readFloatLE(jump);
jump += 4;
obj.distanceTraveled = message.readFloatLE(jump);
jump += 4;
obj.bestLap = message.readFloatLE(jump); // seconds
jump += 4;
obj.lastLap = message.readFloatLE(jump); // seconds
jump += 4;
obj.currentLap = message.readFloatLE(jump); // seconds
jump += 4;
obj.currentRaceTime = message.readFloatLE(jump); // seconds
jump += 4;
obj.lapNumber = message.readUInt16LE(jump);
jump += 2;
obj.racePosition = message.readUInt8(jump);
jump += 1;
obj.accel = message.readUInt8(jump); // 0 - 255
jump += 1;
obj.brake = message.readUInt8(jump); // 0 - 255
jump += 1;
obj.clutch = message.readUInt8(jump);
jump += 1;
obj.handBrake = message.readUInt8(jump);
jump += 1;
obj.gear = message.readUInt8(jump);
jump += 1;
obj.steer = message.readUInt8(jump);
jump += 1;
obj.normalizedDrivingLine = message.readUInt8(jump);
jump += 1;
obj.normalizedAIBrakeDifference = message.readUInt8(jump);
jump += 1;
console.log(remote.address + ':' + remote.port + ' - (' + obj.isRaceOn + '), Gear:' + obj.gear + " - Tire:" + obj.tireSlipRatioFrontLeft);
//const fs = require('fs');
const writeTofile = ()=\>{
let header = "handbrake ,gear, steer, lapnumber";
let data = 'obj.gear, tire, steer, lapnumber \\n';
let csv_data = header + data
console.log(csv_data)
fs.writeFileSync("user.csv" , csv_data , "utf-8")
}
writeTofile()
});
server.bind(PORT, HOST);
app.get('/',(req,res)=\>{
return res.send();
})
app.get('/data', function (req, res) {
return res.send(obj);
});
app.listen(8080,()=\>{
console.log("Servidor ON");
});