Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The SerialPort.getSignals() method of the SerialPort interface returns a Promise that resolves with an object containing the current state of the port's control signals.
js
getSignals()
None.
Returns a Promise that resolves with an object containing the following members:
clearToSend
A boolean indicating to the other end of a serial connection that is clear to send data.
dataCarrierDetect
A boolean that toggles the control signal needed to communicate over a serial connection.
dataSetReady
A boolean indicating whether the device is ready to send and receive data.
ringIndicator
A boolean indicating whether a ring signal should be sent down the serial connection.
InvalidStateError DOMException
Returned if the port is not open. Call SerialPort.open() to avoid this error.
NetworkError DOMException
Returned if the signals on the device could not be read.
| Specification |
|---|
| Web Serial API # dom-serialport-getsignals |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
getSignals |
89 | 89 | No | No | 75 | No | No | No | No | No | No | No |
© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/SerialPort/getSignals