"Hi @Saeed A, the two micro USB connectors are for the connections to the M4 and to the COM. You can find more information about the breakouts/headers on the product pages for the AeroCore 2 for DuoVero and the AeroCore 2 for Overo"
"@James, @ Kabir, @ Dan, Thank you for clarifying
The Aerocore 2 is very similar to a Pixhawk board with a few distinctions: (1) the ability to add a Gumstix COM directly with no additional wiring, (2) the number of pin outs, (3) the availability of…"