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Library for controling Vellman K8090 USB relay card under Linux

Brought to you by: chrisgarcia

Return about library usage

Forum: General Discussion

Creator: Christophe GARCIA

Created: 2014-09-14

Updated: 2019-09-20

Christophe GARCIA - 2014-09-14

How the library works for you ?

What didn't work correctly ?

What could be improved ?

Last edit: Christophe GARCIA 2014-09-14
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Xavier Van Dessel - 2019-09-20

I have installed it on a Raspberry Pi 3 and the tool works as expected.
I use it via cron files to activate the relays at specific times.

There are 2 improvements that could be looked into.
Currently, the tool should be run by root in order to access the usb. It is unclear to me what needs to be done to allow other users access to the usb device. one could use sudo to get arround this. But maybe changing the uid/gid settings of a /dev device would work also.
Another is that it would be nice to have also a daemon version of the tool (k8090d) that would listen on a port for JSON requests to query and/or switch the relays. That would allow integration with software like openhab2.

Regards,
Xavier

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