I am NOT an expert but , don't have too many difficulties. Works on open ATV 7.1 I have found it better to use a current OSCAM 11714 r798 .ipk file and send it to the .tmp folder and install manually.
Make sure oscam.server file has these 2 readers in it
[reader]
label = constant.cw
enable = 0
protocol = constcw
device = /etc/tuxbox/config/constant.cw
caid = 2600,0B00,0B02,0500,0963,06AD,0940
group = 1
[reader]
label = emulator
protocol = emu
device = emulator
disablecrccws_only_for = 0E00:000000
caid = 0500,0604,0E00,1010,1801,2600,2602,2610
detect = cd
ident = 0500:000000,007400,007800,021110,023800;0604:000000;0E00:000000;1010:000000;1801:000000,001101,002111,007301;2600:000000;2602:000000;2610:000000
group = 1
emmcache = 2,1,2,1
emu_auproviders = 0604:010200;0E00:000000;1010:000000;2610:000000
Make sure SoftCam.Key file is in tuxbox / configs
If OSCAM has installed correctly then it should be visible in Open Webif. Click on it and you can edit and check you OSCAM files
Good luck