DeviceReadList
✖
DeviceReadList
reads from the specified device n times, returning a list of the results.
Details

- DeviceReadList effectively performs n sequential reads on the device, as quickly as possible.
- DeviceReadList[device,n] reads the default parameter from the device.
- DeviceReadList is a blocking function; when called, it communicates with the device and does not return until it has the data it needs.
- A device can be specified either by a DeviceObject or by a string representing a device class.
Examples
open allclose allBasic Examples (1)Summary of the most common use cases

https://wolfram.com/xid/0ywcjxzw448a-debd48

Sequentially read the specified number of items from a demo device:

https://wolfram.com/xid/0ywcjxzw448a-f6un7k

Repeatedly read a specified parameter:

https://wolfram.com/xid/0ywcjxzw448a-bd4d6r


https://wolfram.com/xid/0ywcjxzw448a-cadvjg

Applications (1)Sample problems that can be solved with this function
Open the default camera attached to your system:

https://wolfram.com/xid/0ywcjxzw448a-0h8esq

Set an appropriate frame rate and capture a sequence of four frames:

https://wolfram.com/xid/0ywcjxzw448a-i35sd9

https://wolfram.com/xid/0ywcjxzw448a-0blwsr

Wolfram Research (2014), DeviceReadList, Wolfram Language function, https://reference.wolfram.com/language/ref/DeviceReadList.html.
Text
Wolfram Research (2014), DeviceReadList, Wolfram Language function, https://reference.wolfram.com/language/ref/DeviceReadList.html.
Wolfram Research (2014), DeviceReadList, Wolfram Language function, https://reference.wolfram.com/language/ref/DeviceReadList.html.
CMS
Wolfram Language. 2014. "DeviceReadList." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DeviceReadList.html.
Wolfram Language. 2014. "DeviceReadList." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DeviceReadList.html.
APA
Wolfram Language. (2014). DeviceReadList. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DeviceReadList.html
Wolfram Language. (2014). DeviceReadList. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DeviceReadList.html
BibTeX
@misc{reference.wolfram_2025_devicereadlist, author="Wolfram Research", title="{DeviceReadList}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/DeviceReadList.html}", note=[Accessed: 08-July-2025
]}
BibLaTeX
@online{reference.wolfram_2025_devicereadlist, organization={Wolfram Research}, title={DeviceReadList}, year={2014}, url={https://reference.wolfram.com/language/ref/DeviceReadList.html}, note=[Accessed: 08-July-2025
]}