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darrylb123 / usbrelay

Control usb relay - based on hidapi
GNU General Public License v2.0
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intermittent hid_get_feature_report: Protocol error #88

Closed toby11 closed 2 years ago

toby11 commented 2 years ago

usbrelay is working fine 99% of the time for me but I did have it fail once the other day with protocol error - it worked fine a few minutes later, any idea what causes this? Do you have any retry functionality build into the code?

I will handle it in my bash script and retry myself for the time being. are you returning a non-zero exit code on error?

usbrelay output Orig: 6QMBS, Serial: 6QMBS, Relay: 3 State: ff Device Found type: 16c0 05df path: /dev/hidraw1 serial_number: Manufacturer: www.dcttech.com Product: USBRelay8 Release: 100 Interface: 0 Number of Relays = 8 ioctl (GFEATURE): Protocol error hid_get_feature_report: Protocol error

lsusb output Bus 003 Device 004: ID 16c0:05df Van Ooijen Technische Informatica HID device except mice, keyboards, and joysticks

darrylb123 commented 2 years ago

Hi there, I'd be checking hardware in a situation like this. Intermittent errors can be a pain. Try a different cable for a while...

Darryl

On Wed, Jul 13, 2022 at 6:52 PM toby11 @.***> wrote:

usbrelay is working fine 99% of the time for me but I did have it fail once the other day with protocol error - it worked fine a few minutes later, any idea what causes this? Do you have any retry functionality build into the code?

I will handle it in my bash script and retry myself for the time being. are you returning a non-zero exit code on error?

usbrelay output Orig: 6QMBS, Serial: 6QMBS, Relay: 3 State: ff Device Found type: 16c0 05df path: /dev/hidraw1 serial_number: Manufacturer: www.dcttech.com Product: USBRelay8 Release: 100 Interface: 0 Number of Relays = 8 ioctl (GFEATURE): Protocol error hid_get_feature_report: Protocol error

lsusb output Bus 003 Device 004: ID 16c0:05df Van Ooijen Technische Informatica HID device except mice, keyboards, and joysticks

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