Uart embedded c program3/12/2024 ![]() The serial protocol is a fairly old protocol created many years ago it was used by Teletypes and terminals, its also a robust protocol(at least when we use the RS-232 standard that involves +12v and -12v or more so its immune to noise and can cope with long transmission lines), the serial protocol uses 2 wires, one to receive data and other to send data, and of course you must have a shared ground between your arduino/micro-controller and the other device. Hello again, today I will continue with my tutorial series and I write a bit about the USART(or UART in other avr models), the USART give us the possibility to have a serial port, and that is a pretty nice thing to have, because it can be used for example to upload programs to our Arduino(via bootloader), to have a communication channel between our micro-controller and our computer, or to talk to some sensors/chips, the most used ones are serial backpacks for lcd’s and graphical lcd’s and GPS modules that use almost always an serial interface.
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