Pyserial + panda3d example

main.py

from __future__ import print_function
from direct.showbase.ShowBase import ShowBase
import serial

ser = serial.Serial(1, 38400, timeout=0, parity=serial.PARITY_EVEN, rtscts=1)
buffer = ""

MyProgram(ShowBase):
    __init__(self):
        ShowBase.__init__(self)
        self.accept("move-x", self.move_x)

    def poller(self, task):
        buffer += ser.read(100)
        #Code for reading buffer goes here
        commands = {}
        #Interprit buffer into commands. Any incomplete instructions remain in buffer
        #Commands dict looks like {"move-x": 3}
        for command, ammount in commands.values():
            self.messenger.send(command, [ammount])
        return task.cont
    
    def move_x(self, ammount):
        print("Move x by", ammount)


if __name__ == "__main__":
    app = MyProgram()
    app.run()