Exploring Raspberry Pi’s Serial Port

Sudar (@sudarmuthu)http://hardwarefun.comhttps://github.com/sudar

I am going to assume

• You know what is Raspberry Pi• You know what is Arduino• You know what is a serial Port

Raspberry Pi has a serial Port

Using Raspberry Pi’s Serial Port

• To login via serial console• To communicate with other devices like

Arduino

Raspberry Pi’s pins or only 3.3V compatible.

Don’t connect 5V directlyYou will brick your Raspberry Pi

Using Serial port to log into RPi

• You need a USB-to-serial adapter• If not 3.3V then you need a logic level convertor• Connect Tx of RPi to Tx of adapter and Rx to Rx• Power up RPi and you can login using the serial

console.• If you don’t have a USB-to-Serial adapter, then

you can use Arduino - http://hardwarefun.com/tutorials/using-arduino-as-a-bridge-to-connect-serial-devices-with-pc

Using RPi’s Serial Port to communicate with devices

• By default this is disabled.• You need to enable it. Usehttps

://github.com/lurch/rpi-serial-console• Connect Rx of RPi to Tx of your device (Arduino)

and Tx of RPi to Rx of your device• Use a simple serial echo program -

https://github.com/sudar/arduino-robotics-workshop/tree/master/Serial/two_arduino_serial

• You can use screen in Rpi• Profit

Thank You