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Parse data with different ByteLength for a set of serial commands


How do I pass command line arguments to a Node.js program?How to parse JSON using Node.js?How to store Node.js deployment settings/configuration files?What is the difference between __dirname and ./ in node.js?Node.js version on the command line? (not the REPL)What's the difference between dependencies, devDependencies and peerDependencies in npm package.json file?What's the difference between tilde(~) and caret(^) in package.json?Sending commands to AVR from node.jsDisplay multiple sensor data from serial port with javascript and socket.ioserialport node.js read issue with buffer






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








0















I need to fetch the values for a set of commands which will run at regular intervals like



No of Set 1 Commands: 10



No of Set 2 Commands: 4



The problem is that Set 1 Commands will give 2 Bytes and Set 2 Commands will provide 4 Bytes of data which are independent HEX values and i need to perform seperate calculations on the response of both set of commands. These commands also will be sent at regular intervals. I am using the parser provided in the node serialport library



const ByteLength = require('@serialport/parser-byte-length');
parser = myPort.pipe(new ByteLength( length: 2)); // pipe the serial stream to the parser


parser.on('data', console.log);


Bytelength when changed from 2 to 4 does not keep the data persistent like whenever the data event occurs it throws in the incoming buffer and start concatenating.



  1. Is the approach correct?

  2. How to choose variable ByteLength as there is only one global parser and serial port instance

  3. Is setInterval a good fit for this situation









share|improve this question




























    0















    I need to fetch the values for a set of commands which will run at regular intervals like



    No of Set 1 Commands: 10



    No of Set 2 Commands: 4



    The problem is that Set 1 Commands will give 2 Bytes and Set 2 Commands will provide 4 Bytes of data which are independent HEX values and i need to perform seperate calculations on the response of both set of commands. These commands also will be sent at regular intervals. I am using the parser provided in the node serialport library



    const ByteLength = require('@serialport/parser-byte-length');
    parser = myPort.pipe(new ByteLength( length: 2)); // pipe the serial stream to the parser


    parser.on('data', console.log);


    Bytelength when changed from 2 to 4 does not keep the data persistent like whenever the data event occurs it throws in the incoming buffer and start concatenating.



    1. Is the approach correct?

    2. How to choose variable ByteLength as there is only one global parser and serial port instance

    3. Is setInterval a good fit for this situation









    share|improve this question
























      0












      0








      0








      I need to fetch the values for a set of commands which will run at regular intervals like



      No of Set 1 Commands: 10



      No of Set 2 Commands: 4



      The problem is that Set 1 Commands will give 2 Bytes and Set 2 Commands will provide 4 Bytes of data which are independent HEX values and i need to perform seperate calculations on the response of both set of commands. These commands also will be sent at regular intervals. I am using the parser provided in the node serialport library



      const ByteLength = require('@serialport/parser-byte-length');
      parser = myPort.pipe(new ByteLength( length: 2)); // pipe the serial stream to the parser


      parser.on('data', console.log);


      Bytelength when changed from 2 to 4 does not keep the data persistent like whenever the data event occurs it throws in the incoming buffer and start concatenating.



      1. Is the approach correct?

      2. How to choose variable ByteLength as there is only one global parser and serial port instance

      3. Is setInterval a good fit for this situation









      share|improve this question














      I need to fetch the values for a set of commands which will run at regular intervals like



      No of Set 1 Commands: 10



      No of Set 2 Commands: 4



      The problem is that Set 1 Commands will give 2 Bytes and Set 2 Commands will provide 4 Bytes of data which are independent HEX values and i need to perform seperate calculations on the response of both set of commands. These commands also will be sent at regular intervals. I am using the parser provided in the node serialport library



      const ByteLength = require('@serialport/parser-byte-length');
      parser = myPort.pipe(new ByteLength( length: 2)); // pipe the serial stream to the parser


      parser.on('data', console.log);


      Bytelength when changed from 2 to 4 does not keep the data persistent like whenever the data event occurs it throws in the incoming buffer and start concatenating.



      1. Is the approach correct?

      2. How to choose variable ByteLength as there is only one global parser and serial port instance

      3. Is setInterval a good fit for this situation






      node.js serial-communication node-serialport






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Mar 25 at 11:30









      tspreetspree

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