Skip to content

Instantly share code, notes, and snippets.

@voodootikigod
Created January 3, 2012 15:16
Show Gist options
  • Star 1 You must be signed in to star a gist
  • Fork 1 You must be signed in to fork a gist
  • Save voodootikigod/1555300 to your computer and use it in GitHub Desktop.
Save voodootikigod/1555300 to your computer and use it in GitHub Desktop.
Log all output from a serial port connection to a log file.
/*
Simple example that takes a command line provided serial port destination and routes the output to a file of the same name with .log appended to the port name.
usage: node logger.js /dev/tty.usbserial <baudrate>
*/
var SerialPort = require("serialport");
var fs = require("fs");
var port = process.argv[2];
var baudrate = process.argv[3];
var active = false;
function attemptLogging(fd, port, baudrate) {
var serialPort = new SerialPort.SerialPort(port, {
baudrate: baudrate
});
fs.write(fd, "\n------------------------------------------------------------\nOpening SerialPort: "+target+" at "+Date.now()+"\n------------------------------------------------------------\n");
serialPort.on("data", function (data) {
fs.write(fd, data.toString());
});
serialPort.on("close", function (data) {
active = false;
fs.write(fd, "\n------------------------------------------------------------\nClosing SerialPort: "+target+" at "+Date.now()+"\n------------------------------------------------------------\n");
});
}
if (!port) {
console.log("You must specify a serial port location.");
} else {
var target = port.split("/");
target = target[target.length-1]+".log";
if (!baudrate) {
baudrate = 115200;
}
fs.open("./"+target, 'w', function (err, fd) {
setInterval(function () {
if (!active) {
try {
attemptLogging(fd, port, baudrate);
} catch (e) {
// Error means port is not available for listening.
active = false;
}
}
}, 1000);
});
}
@mathiasbynens
Copy link

You could use Date.now() instead of +(new Date()); it’s much more efficient.

@voodootikigod
Copy link
Author

old techniques die hard, good call.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment