An OBD 16x2 Display

test_obd.py

import curses
from time import sleep
from random import randint

myscreen = curses.initscr()

MAX_RPM = 6500
EMPTY = chr(9617)
FULL = chr(9619)
SPEED = ((0, 0), (1,20), (21,40), (35, 60), (50, 90), (60, 145))

if __name__ == '__main__':
    screen = curses.initscr()
    screen.resize(3, 16)

    try:
        while True:
            gear = randint(0,5)
            speed = randint(*SPEED[gear])
            temp = randint(88, 92)
            rpm = randint(850, MAX_RPM)

            rpm_percent = int(round((rpm * 10) / MAX_RPM))
            rpm_bar = '{}{}'.format(
                FULL * rpm_percent,
                EMPTY * (10 - rpm_percent)
            )

            screen.addstr(0, 0, 'G: {} S:{:3d} T:{:3d}'.format(gear, speed,
                                                               temp))
            screen.addstr(1, 0, ' {:4d} {}'.format(rpm, rpm_bar))
            screen.refresh()

            sleep(1)

    finally:
        curses.endwin()