hidapi | Simple cross-platform library
kandi X-RAY | hidapi Summary
kandi X-RAY | hidapi Summary
A Simple library for communicating with USB and Bluetooth HID devices on Linux, Mac and Windows.
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QUESTION
I have a USB device for which the following code
...ANSWER
Answered 2021-Dec-16 at 10:03To write into endpoint 0, you'll need the device.ctrl_transfer(bmRequestType, bmRequest, wValue, wIndex, packet)
instead of endpoint.write(packet)
.
The bmRequestType
, bmRequest
, wValue
and wIndex
correspond to the same elements in the USB control request. The fact that the Windows software uses hidapi
suggests the control transfers are done according to the USB HID specification.
This answer here on Stack Overflow describes how to make USB HID set/get operations on plain PyUSB.
But since the source code you're porting uses hidapi
, using the Python hidapi interface might make the process more straightforward. This question has an example of using hidapi
in Python, and the answers also talk about alternatives.
QUESTION
I have just installed hidapi in my Ubuntu 20.04 following the instructions, i.e. by doing
...ANSWER
Answered 2021-Dec-09 at 16:55If that header is not within the standard search path for headers, then you can include it manually with the -I
flag e.g.
QUESTION
When I set up a python virtual environment and install the hid module it doesn't seem able to find a library that I've installed with MacPorts. I'm running Mac OS Big Sur 11.6.1 and I've also installed python with MacPorts. Any troubleshooting ideas?
...ANSWER
Answered 2021-Nov-15 at 03:48So your problem in fact isn't that your python can't find the hid
package.
When importing hid
, hid
tries to load native libraries that are not installed. this can be solved (on MacOS) using brew install hidapi
as described here
QUESTION
I would like to implement the read and write calls of the python hidapi, in pysub.
An example code using the python hidapi, looks like this:
...ANSWER
Answered 2021-Jun-29 at 13:46Here is a minimum code example that seems to work. The HID device is a Teensy board that uses its RAWHID.recv() and RAWHID.send() to exchange text and binary with the host computer.
QUESTION
I'm trying to interface with a device I found that uses the hid protocol. I'm using signal11's hidapi, and c++, however I'm writing to the device using hidsdi.h, specifically HidD_SetOutputReport, however, this results in "LNK2019: unresolved external symbol HidD_SetOutputReport referenced in function main"
Here is my code:
...ANSWER
Answered 2020-Oct-23 at 21:15You must link your program with Hid.lib
.
Go to project settings / linker and add it to all targets.
QUESTION
I'm trying to write to a hid device using signal11's hidapi (here). In my troubleshooting, I've noticed that part of a string isn't being displayed to the console. Here is a sample of my code
...ANSWER
Answered 2020-Jul-06 at 23:16This line:
QUESTION
ANSWER
Answered 2020-Jun-17 at 22:44The solution was to use udev rules. These rules worked in my case.
I also end up using a different Python library https://github.com/apmorton/pyhidapi. But I am sure the original cython-hidapi would be as fine.
QUESTION
filip@filip-pc:~/Desktop/hidTest$ cargo build
Compiling pkg-config v0.3.17
Compiling libc v0.2.71
Compiling cc v1.0.54
Compiling hidapi v1.2.2
error: failed to run custom build command for `hidapi v1.2.2`
Caused by:
process didn't exit successfully: `/home/filip/Desktop/hidTest/target/debug/build/hidapi-f1cb7b18f844a4a0/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'Unable to find libusb-1.0: "`\"pkg-config\" \"--libs\" \"--cflags\" \"libusb-1.0\"` did not exit successfully: exit code: 1\n--- stderr\nPackage libusb-1.0 was not found in the pkg-config search path.\nPerhaps you should add the directory containing `libusb-1.0.pc\'\nto the PKG_CONFIG_PATH environment variable\nNo package \'libusb-1.0\' found\n"', /home/filip/.cargo/registry/src/github.com-1ecc6299db9ec823/hidapi-1.2.2/build.rs:65:21
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
...ANSWER
Answered 2020-Jun-10 at 20:55You must install libusb-1.0 on your system. You seem to be using Homebrew, so you also have to install it specifically via Homebrew, because that's where pkg-config is looking for it.
It's possible that Homebrew doesn't offer this library under this exact name, or that the hidapi
crate isn't compatible with macOS. Check the hidapi
crate for details, as it's a crate-specific problem.
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