The Universal Asynchronous Receiver Transmitter (UART) is a popular and widely-used device for data communication in the field of telecommunication. There are different versions of UARTs in the industry.

Robosapien_IR.zip contains source files, PCB + Schematic and IR codes specification. The design is based on 8051 core mcu (I use P89C668 in my build), only minor modification needed with other brands of mcu. The board receive command code from serial

8051 universal asynchronous receiver transmitter code

The transmitter part of a RS232 uart, pure software, no hardware support needed. Code can transmit up to 230400 baud on an attiny25/45/85 with an 18.342MHz crystal