# PI Keyboard dropping keys

**URL:** <https://discourse.nodered.org/t/pi-keyboard-dropping-keys/21404>\
**Category:** General\
**Created:** [7 February 2020 16:32 UTC](https://discourse.nodered.org/t/pi-keyboard-dropping-keys/21404 "2020-02-07T16:32:37Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Kenmazing](https://avatars.discourse-cdn.com/v4/letter/k/e68b1a/32.png) [@Kenmazing](https://discourse.nodered.org/u/Kenmazing)\
**Post date:** [7 February 2020 16:32 UTC](https://discourse.nodered.org/t/pi-keyboard-dropping-keys/21404/1 "2020-02-07T16:32:37Z")

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Hi,

I have been trying to use the Pi Keyboard node for reading from a Zebra scangun. On an RPI 3, I get most of the keys, but it would randomly drop them.

I saw where RPI 4 has vastly improved USB capability, so got one. When I got everything installed connected to it, it is very repeatable, but can't get any of the alpha keys. I get shift ups only, and I get all the number keys fine, but no alphas or shift downs.

When I open a shell and scan, the shell displays all the characters. I have also tried slowing the HID output on the scangung, but to no avail.

I have also checked out [https://github.com/raspberrypi/linux/issues/3259](https://github.com/raspberrypi/linux/issues/3259), and have confirmed that my VLI firmware is up to date - version 000137ad

Any ideas would be appreciated, thanks

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [7 April 2020 16:32 UTC](https://discourse.nodered.org/t/pi-keyboard-dropping-keys/21404/2 "2020-04-07T16:32:39Z")

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