Smallest expected node

I think it should be ok. The navspark mini gets one spi bus, and some io (at least one for the sx127x interruption).
So it should work. As i read this possbile node on this thred, i bought one.
Now that i have all the parts, i need to find time to play to get this node working : RFM + navspark mini. Actually i am working on another node by a startup project (with a better gps that the navspark one...)