ojousima.ruuvi_endpoints.ts/lib/ojousima_endpoint_af.js

Experiments with RuuviTags and TS

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.dfafparser = void 0;
var fftbroadcast_1 = require("./fftbroadcast");
var versionStart = 1;
var versionEnd = versionStart + 1;
var typeStart = versionEnd;
var typeEnd = typeStart + 1;
var scaleStart = typeEnd;
var scaleEnd = scaleStart + 2;
var frequencyStart = scaleEnd;
var frequencyEnd = frequencyStart + 2;
var bucketStart = frequencyEnd;
var bucketEnd = bucketStart + 16;
var bytestou16 = function (data) {
    var n = data[0] * 256 + data[1];
    return n;
};
var fixed88ToFload = function (data) {
    var value = bytestou16(data);
    return value / 256;
};
var dfafparser = function (data) {
    if (0xaf !== data[0]) {
        throw new Error('Not DF AC data');
    }
    var dataFormat = 0xac;
    var version = data[versionStart];
    var type = 'unknown';
    switch (data[typeStart]) {
        case 0:
            type = 'X';
            break;
        case 1:
            type = 'Y';
            break;
        case 2:
            type = 'Z';
            break;
        default:
            break;
    }
    var frequency = bytestou16(data.slice(frequencyStart, frequencyEnd));
    var scale = fixed88ToFload(data.slice(scaleStart, scaleEnd));
    var buckets = [];
    for (var ii = 0; ii < 16; ii++) {
        buckets[ii] = data[bucketStart + ii] / scale;
    }
    var id = 0;
    var robject = new fftbroadcast_1.FFTBroadcast(id, null, version, type, scale, frequency, buckets, null, null, dataFormat);
    return robject;
};
exports.dfafparser = dfafparser;