@signalk/nmea0183-signalk
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A node.js/javascript parser for NMEA0183 sentences. Sentences are parsed to Signal K format.
128 lines • 5.03 kB
JavaScript
;
/**
* Copyright 2019 Signal K and Fabian Tollenaar <fabian@decipher.industries>.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
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return function (mod) {
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})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const utils = __importStar(require("@signalk/nmea0183-utilities"));
const nmea_casts_1 = require("../lib/nmea-casts");
const debug_1 = __importDefault(require("debug"));
const debug = (0, debug_1.default)('signalk-parser-nmea0183/BWR');
/**
* $GPBWR,225444,4917.24,N,12309.57,W,051.9,T,031.6,M,001.3,N,004*38
*
* Bearing and distance to waypoint - rhumb line
*
* 0) 225444 UTC time of fix 22:54:44
* 1,2) 4917.24,N Latitude of waypoint
* 3,4) 12309.57,W Longitude of waypoint
* 5,6) 051.9,T Bearing to waypoint, degrees true
* 7,8) 031.6,M Bearing to waypoint, degrees magnetic
* 9,10) 001.3,N Distance to waypoint, Nautical miles
* 11) 004 Waypoint ID
**/
const BWR = function (input, _session) {
const { id, sentence, parts, tags } = input;
const upper = (str) => str.trim().toUpperCase();
debug(`[BWRHook] decoding sentence ${id} => ${sentence}`);
let timestamp;
let position;
let distance;
const bearingToWaypoint = {};
if (upper(parts[0]) === '' ||
upper(parts[1]) === '' ||
upper(parts[2]) === '' ||
upper(parts[3]) === '' ||
upper(parts[4]) === '') {
timestamp = tags.timestamp;
position = null;
distance = null;
}
else {
timestamp = utils.timestamp(parts[0]);
position = {
latitude: (0, nmea_casts_1.coord)(parts[1], parts[2]),
longitude: (0, nmea_casts_1.coord)(parts[3], parts[4])
};
distance = utils.transform(parts[9], upper(parts[10]) === 'N' ? 'nm' : 'km', 'm');
bearingToWaypoint[upper(parts[6]) === 'T' ? 'True' : 'Magnetic'] =
utils.transform(parts[5], 'deg', 'rad');
bearingToWaypoint[upper(parts[8]) === 'T' ? 'True' : 'Magnetic'] =
utils.transform(parts[7], 'deg', 'rad');
}
return {
updates: [
{
timestamp,
source: tags.source,
values: [
{
path: 'navigation.courseRhumbline.bearingTrackTrue',
value: bearingToWaypoint['True'] ?? null
},
{
path: 'navigation.courseRhumbline.bearingTrackMagnetic',
value: bearingToWaypoint['Magnetic'] ?? null
},
{
path: 'navigation.courseRhumbline.nextPoint.distance',
value: distance
},
{
path: 'navigation.courseRhumbline.nextPoint.position',
value: position
}
]
}
]
};
};
exports.default = BWR;
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