Hi Maarten,
So if I read your diagram correctly should it be connected like this?
(DIO3 and GPIO3 should not be connected right?)
Connect:
DIO1 <--> GPIO4
DIO0 <--> GPIO5
MISO <--> GPIO12
MOSI <--> GPIO13
SCK <--> GPIO14
NSS <--> GPIO15
RESET<--> GPIO16
And leave open:
DIO3 <--> GPIO3
Thanks!
Rene