Comment by pzmarzly

A bit of a shameless self-plug, but it took me 4 weekends to implement iMessage message receiving with BlueZ[0]. Sadly, all I learned about Bluetooth LE and Apple's ANCS will be completely useless when it comes to sending messages, since MAP works over Bluetooth, while ANCS works over Bluetooth Low Energy, and these 2 protocols are almost nothing alike.

[0] https://github.com/pzmarzly/ancs4linux