Making uDMX work .. fix(?) provided

[derwin12]

I am using 7.5.x but I was able to make uDMX work with just a couple of minor changes..

Installed libusb-0.1 - need the older library for compatibility.
sudo apt install libusb-0.1-4 libusb-dev

I think it needs to be added to places like FPP_Install.sh

Now the biggest thing that I needed to do was start my actual MH at Channel 2. It seems we are not sending channel 1 to uDMX.
Not clear why that is the case, perhaps it is not sending the right start channel. I see this in the log..

/opt/fpp/src/channeloutput/uDMX.cpp:57: UDMXOutput::UDMXOutput(0, 512)

It is like it is uDMX is starting at channel zero, so if we send xlight channel data starting at 1 it misses that 0 channel data.

Hope this helps - perhaps just a couple of fixes and I can verify on my side. As it is .. it works for me with these changes.

(btw this is what I purchased .. https://www.lixada.com/p-l0385.html )

Edit: And forgot to add .. I dropped the MH on the serial port but then manually created the Other outputs tab to select the uDMX type in the drop down.

[patdelaney]

@derwin12 Possible zero based counting issue> We have had that a long time ago I think.