4. Bot radio v4 - KitronikGameController

4.1. Unique groups

Change the group number in radio.config(group=8) to set unique groups in the room.

Make sure all microbits using a bot have the same group number (0-255).

Edit the code below to set the group.

• MOVEMotor bot code, change radio group to match bot number

• MOVEMotor_v31 200 + bot number

• MOVEMotor v2 150 + bot number

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4.2. MOVEMotor v3.1 radio v4 files:

Hex Files for the MOVEMotor v3.1 can be loaded via the project:open button at: https://python.microbit.org/v/3

Hex file for the bot MOVEMotor bot_v3 hex file.

Hex file for the hand held controller MOVEMotor controller_v4 hex file.

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4.2.1. Using Kitronik Game Controller for variable speeds

4.3. Radio for controller

The code below requires button pressing for motor control.

No durations are set, so the motors will continue running with the last instruction they receive.

To spin, press the microbit A or B button.

Use this instead of stopping, since there is no code to send an “X”.

For increasing speed forward, send: F, G, H.

Press the joypad UP button, F is sent, and a slow speed results.

Hold down the FIRE SW 1 button, and press the joypad UP button, G is sent, and a medium speed results.

Hold down the FIRE SW 2 button, and press the joypad UP button, H is sent, and a fast speed results.

For increasing speed backward, send: B, C, D

Press the joypad DOWN button.

For increasing speed left, send: L, M, N

Press the joypad LEFT button.

For increasing speed right, send: R, S, T

Press the joypad LEFT button.

# MoverMotor bot code, change radio group to match bot number in 200s
# MOVEMotor_v31  200 + number
# MM v2 150 + number

from microbit import *
import music
import radio

radio.config(group=151)  # 0-255
radio.on()


# Class to drive Kitronik :GAME Controller
class KitronikGameController:

    # This function will be called when a class instance is created
    def __init__(self):
        self.musicPin = pin2
        self.Up = pin8
        self.Down = pin14
        self.Left = pin12
        self.Right = pin13
        self.Fire_1 = pin15
        self.Fire_2 = pin16

    # Determines whether a particular button has been pressed
    #  (returns True or False)
    def onButtonPress(self, button):
        if button.read_digital() == 0:
            return True
        else:
            return False

controller = KitronikGameController()
msg=""

while True:
    msg=""

    if button_a.is_pressed():
        # spin
        msg = "sL"
    elif button_b.is_pressed():
        # spin
        msg = "sR"
    elif controller.onButtonPress(controller.Fire_2) is True:
        if controller.onButtonPress(controller.Up) is True:
            msg = "H"
        elif controller.onButtonPress(controller.Down) is True:
            msg = "D"
        elif controller.onButtonPress(controller.Left) is True:
            msg = "N"
        elif controller.onButtonPress(controller.Right) is True:
            msg = "T"
    elif controller.onButtonPress(controller.Fire_1) is True:
        if controller.onButtonPress(controller.Up) is True:
            msg = "G"
        elif controller.onButtonPress(controller.Down) is True:
            msg = "C"
        elif controller.onButtonPress(controller.Left) is True:
            msg = "M"
        elif controller.onButtonPress(controller.Right) is True:
            msg = "S"
    else:
        if controller.onButtonPress(controller.Up) is True:
            msg = "F"
        elif controller.onButtonPress(controller.Down) is True:
            msg = "B"
        elif controller.onButtonPress(controller.Left) is True:
            msg = "L"
        elif controller.onButtonPress(controller.Right) is True:
            msg = "R"
    radio.send(msg)
    display.show(msg)

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4.4. Code for microbit on MOVEMotor

See v3 code.

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4.5. Turning backwards

Tasks

1. Add B button pressing to allow backwards movement while turning.