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Using Raspberry Pi’s Serial Port
• To login via serial console
• To communicate with other devices like
Raspberry Pi’s pins or only 3.3V
Don’t connect 5V directly
You 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
• If you don’t have a USB-to-Serial adapter, then
you can use Arduino http://hardwarefun.com/tutorials/using-arduinoas-a-bridge-to-connect-serial-devices-with-pc
Using RPi’s Serial Port to communicate
• By default this is disabled.
• You need to enable it.
• 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-roboticsworkshop/tree/master/Serial/two_arduino_serial
• You can use screen in Rpi