This schematic and Gerber files of PCB that is used for GSM alarm system. This is industrial-grade system with many features like 1-wire (iButton) interface, additional interface for video camera (UART JPEG camera is used), SD card to store pictures

test UART serial for JPEG Camera Serial UART Interface with Built-in Infrared (TTL level) (LS-Y201-IR-TTL) -test UART serial for JPEG Camera Serial UART Interface with Built-in Infrared (TTL level) (LS-Y201-IR-TTL)