How do I program a nRF52840 Dongle with the thread CoAP example?

[Timo Jansen]

Hello,

I'm trying to program a nRF52840 Dongle with the thread MTD client example by using nRF Connect but I get an error 
saying I need to add a SoftDevice. I thought the thread examples didn't need a SoftDevice and when I try to add one 
it just overlaps the example's hex file.

Is it even possible to use the thread examples with the nRF52840 Dongle?

Thanks in advance,

Timo Jansen