@signalk/nmea0183-signalk
Version:
A node.js/javascript parser for NMEA0183 sentences. Sentences are parsed to Signal K format.
115 lines • 4.21 kB
JavaScript
;
/**
* Copyright 2016 Signal K <info@signalk.org> and contributors.
*
* 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.
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
const utils = __importStar(require("@signalk/nmea0183-utilities"));
/*
=== VTG - Track made good and Ground speed ===
------------------------------------------------------------------------------
0 1 2 3 4 5 6 7 8 9
| | | | | | | | | |
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K,m,*hh<CR><LF>
------------------------------------------------------------------------------
Field Number:
0. Track Degrees
1. T = True
2. Track Degrees
3. M = Magnetic
4. Speed Knots
5. N = Knots
6. Speed Kilometers Per Hour
7. K = Kilometers Per Hour
8. FAA mode indicator (NMEA 2.3 and later)
9. Checksum
*/
const VTG = function (input, _session) {
const { parts, tags } = input;
if (parts[2] === '' &&
parts[0] === '' &&
parts[6] === '' &&
parts[4] === '') {
return null;
}
let speed = 0.0;
if (utils.float(parts[6]) > 0 && String(parts[7]).toUpperCase() === 'K') {
speed = utils.transform(utils.float(parts[6]), 'kph', 'ms');
}
else if (utils.float(parts[4]) > 0 &&
String(parts[5]).toUpperCase() === 'N') {
speed = utils.transform(utils.float(parts[4]), 'knots', 'ms');
}
return {
updates: [
{
source: tags.source,
timestamp: tags.timestamp,
values: [
{
path: 'navigation.courseOverGroundMagnetic',
value: parts[2].length === 0
? null
: utils.transform(utils.float(parts[2]), 'deg', 'rad')
},
{
path: 'navigation.courseOverGroundTrue',
value: parts[0].length === 0
? null
: utils.transform(utils.float(parts[0]), 'deg', 'rad')
},
{
path: 'navigation.speedOverGround',
value: speed
}
]
}
]
};
};
exports.default = VTG;
//# sourceMappingURL=VTG.js.map