@jbroll/nmea-simple
Version:
NMEA 0183 sentence parser and encoder
57 lines (56 loc) • 2.3 kB
JavaScript
;
/*
* === GLL - Geographic position - latitude and longitude ===
*
* ------------------------------------------------------------------------------
* 1 2 3 4 5 6 7 8
* | | | | | | | |
* $--GLL,llll.ll,a,yyyyy.yy,a,hhmmss.ss,a,m,*hh<CR><LF>
* ------------------------------------------------------------------------------
*
* Field Number:
*
* 1. Latitude
* 2. N or S (North or South)
* 3. Longitude
* 4. E or W (East or West)
* 5. Universal Time Coordinated (UTC)
* 6. Status
* A - Data Valid
* V - Data Invalid
* 7. FAA mode indicator (NMEA 2.3 and later)
* 8. Checksum
*/
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
var helpers_1 = require("../helpers");
var PacketStub_1 = require("./PacketStub");
exports.sentenceId = "GLL";
exports.sentenceName = "Geographic position - latitude and longitude";
function decodeSentence(stub, fields) {
return __assign(__assign({}, PacketStub_1.initStubFields(stub, exports.sentenceId, exports.sentenceName)), { latitude: helpers_1.parseLatitude(fields[1], fields[2]), longitude: helpers_1.parseLongitude(fields[3], fields[4]), time: helpers_1.parseTime(fields[5]), status: fields[6] === "A" ? "valid" : "invalid", faaMode: fields[7] });
}
exports.decodeSentence = decodeSentence;
function encodePacket(packet, talker) {
var result = ["$" + talker + exports.sentenceId];
result.push(helpers_1.encodeLatitude(packet.latitude));
result.push(helpers_1.encodeLongitude(packet.longitude));
result.push(helpers_1.encodeTime(packet.time));
result.push(packet.status === "valid" ? "A" : "V");
if (packet.faaMode) {
result.push(packet.faaMode);
}
var resultWithoutChecksum = result.join(",");
return resultWithoutChecksum + helpers_1.createNmeaChecksumFooter(resultWithoutChecksum);
}
exports.encodePacket = encodePacket;