39 lines
1.0 KiB
JavaScript
39 lines
1.0 KiB
JavaScript
// Define port and reader globally to be used in other functions
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let port;
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let reader
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let decoder = new TextDecoder("utf-8");
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let counterElement = document.getElementById("counter");
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// Request a port and open a connection.
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async function connect() {
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port = await navigator.serial.requestPort();
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await port.open({ baudRate: 9600 });
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reader = port.readable.getReader();
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console.log("Port is open!");
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}
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// Read data
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async function readLoop() {
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// loop until reader.cancel() is called
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while (true) {
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// Wait for data
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const { value, done } = await reader.read();
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// Show the received data in the console
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if (value) {
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console.log(decoder.decode(value));
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}
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// Exit the loop when done
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if (done) {
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console.log('[readLoop] DONE', done);
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reader.releaseLock();
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break;
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}
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}
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}
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// Close the port
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async function disconnect() {
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await reader.cancel();
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await port.close();
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console.log("Port is closed!");
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} |