SerialPort: setSignals() method

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The setSignals() method of the SerialPort interface sets control signals on the port and returns a Promise that resolves when they are set.

Syntax

js

setSignals()
setSignals(options)

Parameters

options Optional

An object with any of the following values:

dataTerminalReady

A boolean indicating whether to invoke the operating system to either assert (if true) or de-assert (if false) the "data terminal ready" or "DTR" signal on the serial port.

requestToSend

A boolean indicating whether to invoke the operating system to either assert (if true) or de-assert (if false) the "request to send" or "RTS" signal on the serial port.

break

A boolean indicating whether to invoke the operating system to either assert (if true) or de-assert (if false) the "break" signal on the serial port.

Return value

A Promise.

Exceptions

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 set.

Specifications

Specification
Web Serial API
# dom-serialport-setsignals

Browser compatibility

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