Blink1 mk3 doesn't seem to be able to open properly

[kazrakcom]

Attempting to open a mk3 seems to fail with "all devices busy".

Tossing some logging into OpenNextDevice, it appears that openDevices[dev.Device] is not nil even for a freshly-inserted mk3. I see "&{0xc00009b3e0 100ms {0 0 0 0 0s 10ms}}" as the value there.

I'm investigating further, but logging this here for reference.

[kazrakcom]

Okay. Marking as closed; mk3 handles reopening differently, but it's my fault. One must explicitly Close() before it can be found with OpenNextDevice().

[kazrakcom]

Attempting to write to a mk3 fails for unclear reasons.

[kazrakcom]

package main

import (
blink1 "github.com/hink/go-blink1"
)

func main() {
device, err := blink1.OpenNextDevice()
if err != nil {
panic(err)
}
err = device.SetState(blink1.State{Red: 255})
if err != nil {
panic(err)
}
}

Works fine on a mk2, running on a mk3 gives:

panic: Unable to write to blink(1)

goroutine 1 [running]:
main.main()
[path]/test.go:14 +0x87
exit status 2

[todbot]

Could the problem be that at line:
https://github.com/hink/go-blink1/blob/master/libusb/blink1.go#L19
That first byte is the reportId and it should be 1 instead of 0. I believe blink(1) mk1 and mk2 devices did not explicitly check the reportId but mk3 devices do because it supports two different reports.

[todbot]

I believe I have found the problem. I have submitted PR #8 to address it.

[mgumz]

@kazrakcom yep, @todbot's patch works.