I have an RPi and a freescale FRDM-KL25z controller which will talk over serial protocol. I'm using the pyserial library on the pi:
import serial ser = serial.Serial('/dev/ttyAMA0', 9600) ser.write('hi FRDM')
and using the serial protocol from the mbed library will generate interrupts to process the data from the Pi.
My question is, having two devices which talk over the same protocol at the same potential and in close proximity, do I need a logic level converter or some form of UART chip?
I would think not, but I am aware that RS232 is a +-12V protocol so would just like to ensure that this assumption is correct.