I am designing a IoT gateway with 2 DA14585 as peripheral BLE devices. So I have two things which I am unable to figure out -
1) I want to interface DA14585 to my host MCU using SPI. So how could I do it right since diaolg's SUOTA require an external SPI interfaced to the DA14585 and DA14585 has only one SPI port. Point me to any reference designs available.
2) I am intending to use external antennas linked to onboard SMA connectors for better antenna range for my BLE application. Please suggest if there is a better alternative than this.
Thanks & regards,