Yoctopuce Yocto-GPS, Руководство пользователя

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// Setup the API to use the VirtualHub on local machine
let errmsg = new YErrorMsg () ;
if(await YAPI. RegisterHub ( '127.0.0.1' , errmsg ) != YAPI. SUCCESS ) {
console. log ( 'Cannot contact VirtualHub on 127.0.0.1: ' +errmsg. msg ) ;
return ;
}
// Select specified device, or use first available one
let serial = process. argv [ process. argv . length - 1 ] ;
if( serial [ 8 ] != '-' ) {
// by default use any connected module suitable for the demo
let anysensor = YGps. FirstGps () ;
if( anysensor ) {
let module = await anysensor. module () ;
serial = await module. get_serialNumber () ;
} else {
console. log ( 'No matching sensor connected, check cable !' ) ;
return ;
}
}
console. log ( 'Using device ' +serial ) ;
gps = YGps. FindGps ( ".gps" ) ;
refresh () ;
}
async function refresh ()
{
if ( ! await gps. isOnline ()) {
console. log ( 'Module not connected' ) ;
} else if (await gps. get_isFixed () != YGps. ISFIXED_TRUE ) {
console. log ( 'fixing...' ) ;
} else {
console. log ( 'Position : ' + (await gps. get_latitude ()) + ' ' + (await
gps. get_longitude ())) ;
}
setTimeout ( refresh, 500 ) ;
}
startDemo () ;
As explained at the beginning of this chapter, you need to have Node.js and jspm installed to try this
example. When done, you can type the following two commands to automatically download and
install the dependencies for building this example:
npm install
jspm install
You can the start the sample code within Node.js using the following command, replacing the [...] by
the arguments that you want to pass to the demo code:
jspm run src/demo.js [ ... ]
Same example, but this time running in a browser
If you want to see how to use the library within a browser, switch to the directory example_html/
Doc-GettingStarted-Yocto-GPS . You will find there a subdirectory src as well with a very similar
source code (below), but with a few changes compared to the Node.js version since it has to interact
through an HTML page rather than through the JavaScript console.
import { YAPI, YErrorMsg, YGps } from 'yoctolib-es' ;
async function startDemo ()
{
await YAPI. LogUnhandledPromiseRejections () ;
await YAPI. DisableExceptions () ;
// Setup the API to use the VirtualHub on local machine
let errmsg = new YErrorMsg () ;
if(await YAPI. RegisterHub ( '127.0.0.1' , errmsg ) != YAPI. SUCCESS ) {
alert ( 'Cannot contact VirtualHub on 127.0.0.1: ' +errmsg. msg ) ;
}
7. Using Yocto-GPS with JavaScript / EcmaScript
42 www.yoctopuce.com