@jbroll/nmea-simple
Version:
NMEA 0183 sentence parser and encoder
51 lines (50 loc) • 2.15 kB
JavaScript
;
/*
* === MWV - Wind speed and angle ===
*
* ------------------------------------------------------------------------------
* 1 2 3 4 5
* | | | | |
* $--MWV,x.x,a,x.x,a*hh<CR><LF>
* ------------------------------------------------------------------------------
*
* Field Number:
*
* 1. Wind Angle, 0 to 360 degrees
* 2. Reference, R = Relative, T = True
* 3. Wind Speed
* 4. Wind Speed Units, K/M/N
* 5. Status, A = Data Valid
* 6. Checksum
*/
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
var helpers_1 = require("../helpers");
var PacketStub_1 = require("./PacketStub");
exports.sentenceId = "MWV";
exports.sentenceName = "Wind speed and angle";
function decodeSentence(stub, fields) {
return __assign(__assign({}, PacketStub_1.initStubFields(stub, exports.sentenceId, exports.sentenceName)), { windAngle: helpers_1.parseFloatSafe(fields[1]), reference: fields[2] === "R" ? "relative" : "true", speed: helpers_1.parseFloatSafe(fields[3]), units: fields[4] === "K" ? "K" : fields[4] === "M" ? "M" : "N", status: fields[5] === "A" ? "valid" : "invalid" });
}
exports.decodeSentence = decodeSentence;
function encodePacket(packet, talker) {
var result = ["$" + talker + exports.sentenceId];
result.push(helpers_1.encodeDegrees(packet.windAngle));
result.push(packet.reference === "relative" ? "R" : "T");
result.push(helpers_1.encodeFixed(packet.speed, 2));
result.push(packet.units === "K" ? "K" : packet.units === "M" ? "M" : "N");
result.push(packet.status === "valid" ? "A" : "V");
var resultWithoutChecksum = result.join(",");
return resultWithoutChecksum + helpers_1.createNmeaChecksumFooter(resultWithoutChecksum);
}
exports.encodePacket = encodePacket;