Well, a safe answer is: It Depends... Although our founder and CEO, mr. Karst Drenth, designed and developed all the black DR4xxx and DR5xxx modules sold by Digikeijs, none of them can be supported in respect to the hardware and/or firmware/software. Digikeijs themselves are fully responsible for maintenance, support and repairs.
So we don't provide any free-of-charge support/advice/troubleshooting for the black Digikeijs modules.