This library is designed to provide a consistent API for accessing Serial/Bluetooth devices from the web using Web Serial and Web Bluetooth.
It is designed to more or less mimic the Puck.js library, but adds support for Web Serial devices.
To work, it needs to be run from a website that's served over HTTPS (not HTTP). While you can set one up yourself with Let's Encrypt, we're not going to cover that here. Instead, we'll use GitHub Pages.
Repositories
tab, and click New
UARTTest
as the name, make sure you check Initialize this repository with a README
,
and click Create
(if you don't, you'll have to use command-line tools to create a new file)Settings
tab in the top rightGitHub Pages
, under Source
choose master branch
and click Save
Code
tab, and click Create new file
in the top righttest.html
as the nameCommit new file
at the bottom:<html>
<head>
</head>
<body>
<script src="https://www.espruino.com/js/uart.js"></script>
<button onclick="UART.write('LED1.set();\n');">LED On!</button>
<button onclick="UART.write('LED1.reset();\n');">LED Off!</button>
</body>
</html>
You'll now have your own webpage at: https://your_username.github.io/UARTTest/test.html
You can always just click 'Try Me!' above
As well as UART.write
for sending data, UART.eval
is available for reading back data:
<html>
<head>
</head>
<body>
<script src="https://www.espruino.com/js/uart.js"></script>
<script>
function getTemperature() {
UART.eval('E.getTemperature()', function(t) {
document.getElementById("result").innerHTML = t;
});
}
</script>
<button onclick="getTemperature()">Get Temperature</button>
<span id="result"></span>
</body>
</html>
For further details, check out the Web Bluetooth page, the UART.js repository, and the UART.js code itself.
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