Serial Communication Between Arduino And Python, Issue Of Using Hexidecimal Values

I am attempting to start a motor from the computer by code in Python 3.4, using pySerial to communicate to an Arduino Uno. I have packed the value I am sending to hexidecimal, so I

Solution 1:

its not hard here is a simple example, its usually a good idea to start simple and then increase the functionality to what you want.

test_serial.py

import serial
ser = serial.Serial("COM4",timeout=5) # everything else is default
ser.write("\x45")
print"RECIEVED BACK:",repr(ser.read(5000))

test_serial.ino

int incomingByte = 0;   // for incoming serial datavoidsetup() {
        Serial.begin(9600);     // opens serial port, sets data rate to 9600 bps
}

voidloop() {

        // send data only when you receive data:if (Serial.available() > 0) {
                // read the incoming byte:
                incomingByte = Serial.read();

                // say what you got:
                Serial.print("I received: ");
                Serial.println(incomingByte, DEC);
        }
}