Raspberry Pi: Difference between revisions

The RPi has 2 serials (UARTs). This tutorial only concerns itself with UART0, called simply UART or serial port. UART1 is ignored from now on. The basic UART onboard uses a 3.3V TTL and is connected to some of the GPIO pins labeled "P1" on the board. x86 PCs and MACs do use 5V TTL so you need some adaptor to convert the TTL. I recommend a '''USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi''' with separate connectors per lead, like [http://www.adafruit.com/products/954 commercial RPi serial adaptor]. Which is then connected to the RPi [[Media:ARM_RaspberryPi_serial.jpg|like this]]. Slightly cheaper [http://www.ebay.com/itm/USB-To-RS232-TTL-PL2303HX-Auto-Converter-Module-Converter-Adapter-5V-3-3V-Output-/350568364250 PL2303HX adapter] was found usable, but seems to be unreliable if connected to an USB port with an extension cable (a USB 2.0 hub might remedy this).