Well, I got it working.

Download the image : openpli-4.0-beta-dm800sev2-20150917-sim2-ssl88a.nfi

after initialising everything and activated the lan, go to plugin, software management.

go to Network,

Install the wireless lan plugin, the last one...

Upload the 0.OpenPLi_kernel_3.2-module-rt7777_1.0-r14.0_dm800hdsev2.ipk

Install it via the Same Software Management, locale ... select tmp...

Reboot the DM.

Cheers.

Champtheone
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DM800HD with Japhar Sim NC3 for DM800HD - OpenPli 4.0
Sunray DM800HD se V2, Sim2.20 #88 - openpli-4.0-beta-dm800sev2-20150917-sim2-ssl88a.nfi