Web serial api , Port open without user gesture

Question

In web serial api, I am able to open ports on button click. Is there any way to open port once the port is connected ? onconnect event does not open port, asking for user gesture...I need automatic open for mass production...

François Beaufort · Accepted Answer · 2021-12-02 08:06:53Z

1

As indicated in https://web.dev/serial/#open-port, requestPort() requires a user gesture such as touch or mouse click. However once you have a port, you can open() one on subsequent page load without any user gesture.

// Get all serial ports the user has previously granted the website access to.
const ports = await navigator.serial.getPorts();

// Assuming the first one is the one you want to open...
const port = ports[0];

// Open serial port without user gesture.
await port.open({ baudRate: 9600 });

answered Dec 2, 2021 at 8:06

François Beaufort

5,8193 gold badges31 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Sibin Over a year ago

Thanks for the reply..... I realised that it certainly requires a user gesture.

Collectives™ on Stack Overflow

Web serial api , Port open without user gesture

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related