List of supported hardware is there:
It’s also in our documentation and on github.
There is no Dragino in the list, why you decided to buy it to work with Blynk? 
Adding @vshymanskyy here. Maybe he can help you.
List of supported hardware is there:
It’s also in our documentation and on github.
There is no Dragino in the list, why you decided to buy it to work with Blynk?
Adding @vshymanskyy here. Maybe he can help you.