knx/src/dptlib/dpt16.js

KNXnet/IP protocol implementation for Node(>=6.x)

/**
 * knx.js - a KNX protocol stack in pure Javascript
 * (C) 2016-2018 Elias Karakoulakis
 */

const log = require('log-driver').logger;

//
// DPT16: ASCII string (max 14 chars)
//

exports.formatAPDU = (value) => {
  if (typeof value !== 'string') return log.warn('Must supply a string value');

  const buf = Buffer.alloc(14);
  buf.write(value, 'ascii');
  return buf;
};

exports.fromBuffer = (buf) => buf.toString('ascii');
// DPT16 basetype info
exports.basetype = {
  bitlength: 14 * 8,
  valuetype: 'basic',
  desc: '14-character string',
};

// DPT9 subtypes
exports.subtypes = {
  // 16.000 ASCII string
  '000': {
    use: 'G',
    name: 'DPT_String_ASCII',
    desc: 'ASCII string',
    force_encoding: 'US-ASCII',
  },

  // 16.001 ISO-8859-1 string
  '001': {
    use: 'G',
    name: 'DPT_String_8859_1',
    desc: 'ISO-8859-1 string',
    force_encoding: 'ISO-8859-1',
  },
};