Web Reference: Abstract UART, or universal asynchronous receiver-transmitter, is one of the most used device-to-device communication protocols. This article shows how to use UART as a hardware communication protocol by following the standard procedure. UART is used to connect modules like GPS, Bluetooth, and RFID card readers to the Raspberry Pi, Arduino, and other microcontrollers. Learn how it works with this easy to understand tutorial. “UART” describes the byte framing, not the electrical layer. You’ll see these terms used interchangeably, but they aren’t identical: UART: the asynchronous framing engine (start bit, data bits, optional parity, stop bit). USART: a UART that can also run in a synchronous mode (clocked).
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