I was interested in how Apple AirPlay screen mirroring is implemented in this super cheap Chinese HDMI dongles. Apple’s protocol is closed source and was reverse engineered back in in 2004. I couldn’t find an up to date open source project which implements a AirPlay server supporting screen mirroring. So lets see what this HDMI dongles have under the hood.
I purchased a device from ELEGIANT. I think there are also devices, sold under a different brand which are based on the same hardware.
Hardware
Just a quick summery of the found hardware components.
CPU
Rockchip RK3036G
ARM Cortex A7 dual core
RAM
128MB DDR3 SPI
Winbond W691GG6KB
Flash
16MB SPI
Winbond W25Q128BVIG
ID: 0x00ef4018
WiFi
Realtek RTL8188ETV
Connected via USB interface