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DeviceWrite[device,val]

writes the value val to the specified device.

DeviceWrite[device,{val1,val2,…}]

writes the sequence of values vali to the specified device.

DeviceWrite[device,paramval]

writes val as the value of the parameter param.

DeviceWrite[device,{param1val1,param2val2,…}]

writes values of several parameters.

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DeviceWrite

DeviceWrite[device,val]

writes the value val to the specified device.

DeviceWrite[device,{val1,val2,…}]

writes the sequence of values vali to the specified device.

DeviceWrite[device,paramval]

writes val as the value of the parameter param.

DeviceWrite[device,{param1val1,param2val2,…}]

writes values of several parameters.

Details

  • A device can be specified either by a DeviceObject or by a string representing a device class.
  • DeviceWrite is a blocking function; when called, it communicates with the device and does not return until it has finished writing data.
  • DeviceWrite[device,vals] returns vals, even if for some reason the write operation fails.

Examples

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Basic Examples  (1)

Open a demo device and write an expression to it:

Wolfram Language code: dev = DeviceOpen["WriteDemo"]
Wolfram Language code: DeviceWrite[dev, $OperatingSystem];

Read from the device to verify successful writing:

Wolfram Language code: DeviceRead[dev]

Write a sequence of expressions and read the result:

Wolfram Language code: DeviceWrite["WriteDemo", {"a string", Subsuperscript[∫, a, b]Sin[x]ⅆx}];
Wolfram Language code: DeviceReadList[dev, 3]

Close the device:

Wolfram Language code: DeviceClose[dev]

Applications  (3)

Open a connection to a weather station device, configure it for writing, and write a string to the attached LCD:

Wolfram Language code: dev = DeviceOpen["TinkerForgeWeatherStation"]
Wolfram Language code: DeviceConfigure[dev, "LCDBrickletUID" -> "gLp"];
Wolfram Language code: DeviceWrite[dev, "This is a string"];

Configure the pin direction of a GPIO device, e.g. on Raspberry Pi, and set it to digital "High":

Wolfram Language code: DeviceConfigure["GPIO", 4 -> "Output"];
Wolfram Language code: DeviceWrite["GPIO", 4 -> 1]

Write a string of bytes to a Sphero robotic ball:

Wolfram Language code: dev = DeviceOpen["SerialDemo", "*Sphero*"]
Wolfram Language code: DeviceWrite[dev, FromCharacterCode[{255, 255, 0, 1, 5, 1, 248}]];

Read in the device response:

Wolfram Language code: DeviceReadBuffer[dev]
Wolfram Research (2014), DeviceWrite, Wolfram Language function, https://reference.wolfram.com/language/ref/DeviceWrite.html.

Text

Wolfram Research (2014), DeviceWrite, Wolfram Language function, https://reference.wolfram.com/language/ref/DeviceWrite.html.

CMS

Wolfram Language. 2014. "DeviceWrite." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DeviceWrite.html.

APA

Wolfram Language. (2014). DeviceWrite. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DeviceWrite.html

BibTeX

@misc{reference.wolfram_2026_devicewrite, author="Wolfram Research", title="{DeviceWrite}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/DeviceWrite.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_devicewrite, organization={Wolfram Research}, title={DeviceWrite}, year={2014}, url={https://reference.wolfram.com/language/ref/DeviceWrite.html}, note=[Accessed: 12-June-2026]}