2. Bot radio v2
This uses more settings for the motor control by tilting to different degrees.
Three speed settings are used below.
2.1. Unique groups
Use
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.
The buggy speeds and durations can also be edited for different responses.
2.2. Radio for controller
The code below gives messages based on forwards - backwards tilting and sideways tilting.
The code displays the message on the microbit for testing purposes.
For the forwards and backwards tilting, make sure not to tilt the microbit sideways.
If the microbit is level,
-200 <= y_reading <= 200 and -200 <= x_reading <= 200, send an “X”, to stop.For increasing speed forward, send: F, G, H.
Tilt forwards a bit, F is sent, and a slow speed results.
Tilt forwards a bit more, G is sent, and a medium speed results.
Tilt forwards a lot, H is sent, and a fast speed results.
For increasing speed backward, send: B, C, D
Tilt backwards more and more.
For increasing tightness of turn left, send: L, M, N
Tilt left more and more.
For increasing tightness of turn right, send: R, S, T
Tilt right more and more.
To force a stop, hold down the A button.
To force a short spin to left, hold down the B button.
from microbit import *
import radio
radio.config(group=8) # 0-255
radio.on()
while True:
sleep(50)
if button_a.is_pressed():
# stop
msg = "X"
elif button_b.is_pressed():
# spin left
msg = "W"
else:
y_reading = accelerometer.get_y()
x_reading = accelerometer.get_x()
# level sideways only
if -200 <= y_reading <= 200 and -200 <= x_reading <= 200:
msg = "X"
# level sideways only
elif -200 <= x_reading <= 200:
if y_reading > 700:
msg = "D"
elif y_reading > 500:
msg = "C"
elif y_reading > 200:
msg = "B"
elif y_reading < -700:
msg = "H"
elif y_reading < -500:
msg = "G"
elif y_reading < -200:
msg = "F"
else:
if x_reading > 700:
msg = "T"
elif x_reading > 500:
msg = "S"
elif x_reading > 200:
msg = "R"
elif x_reading < -700:
msg = "N"
elif x_reading < -500:
msg = "M"
elif x_reading < -200:
msg = "L"
radio.send(msg)
display.show(msg)
2.3. Radio for microbit on MiniBit
The code below moves the MiniBit at maximum speed, since its top speed is relatively slow.
The tightness of 5 gives a tight turn.
High turning speed settings are used below for best control based on testing.
from microbit import *
import radio
import MiniBit
radio.config(group=8) # 0-255
radio.on()
buggy = MiniBit.MiniBitMotors()
while True:
sleep(50)
msg = radio.receive()
if msg is not None:
display.show(msg)
if msg == "B":
buggy.backwards(speed=5)
elif msg == "C":
buggy.backwards(speed=8)
elif msg == "D":
buggy.backwards(speed=10)
elif msg == "F":
buggy.forwards(speed=5)
elif msg == "G":
buggy.forwards(speed=8)
elif msg == "H":
buggy.forwards(speed=10)
elif msg == "X":
buggy.stop()
elif msg == "L":
buggy.left(speed=10, tightness=2)
elif msg == "M":
buggy.left(speed=10, tightness=3)
elif msg == "N":
buggy.left(speed=10, tightness=5)
elif msg == "R":
buggy.right(speed=10, tightness=2)
elif msg == "S":
buggy.right(speed=10, tightness=3)
elif msg == "T":
buggy.right(speed=10, tightness=5)
elif msg == "W":
buggy.spin_left(speed=1)
2.4. Radio for microbit on BitBotXL
The code below moves the BitBotXL at maximum speed, since its top speed is relatively slow.
The tightness of 5 gives a tight turn.
High turning speed settings are used below for best control based on testing.
from microbit import *
import radio
import BitBotXL
radio.config(group=8) # 0-255
radio.on()
buggy = BitBotXL.BitBotXLMotors()
while True:
sleep(50)
msg = radio.receive()
if msg is not None:
display.show(msg)
if msg == "B":
buggy.backwards(speed=5)
elif msg == "C":
buggy.backwards(speed=8)
elif msg == "D":
buggy.backwards(speed=10)
elif msg == "F":
buggy.forwards(speed=5)
elif msg == "G":
buggy.forwards(speed=8)
elif msg == "H":
buggy.forwards(speed=10)
elif msg == "X":
buggy.stop()
elif msg == "L":
buggy.left(speed=10, tightness=2)
elif msg == "M":
buggy.left(speed=10, tightness=3)
elif msg == "N":
buggy.left(speed=10, tightness=5)
elif msg == "R":
buggy.right(speed=10, tightness=2)
elif msg == "S":
buggy.right(speed=10, tightness=3)
elif msg == "T":
buggy.right(speed=10, tightness=5)
elif msg == "W":
buggy.spin_left(speed=1)
2.5. Radio for microbit on MOVEMotor
The code below moves the MOVEMotor at varying speed.
The radius of 5 gives a tight turn.
from microbit import *
import radio
import MOVEMotor
radio.config(group=8) # 0-255
radio.on()
buggy = MOVEMotor.MOVEMotorMotors()
while True:
sleep(50)
msg = radio.receive()
if msg is not None:
display.show(msg)
if msg == "B":
buggy.backwards(speed=5)
elif msg == "C":
buggy.backwards(speed=8)
elif msg == "D":
buggy.backwards(speed=10)
elif msg == "F":
buggy.forwards(speed=5)
elif msg == "G":
buggy.forwards(speed=8)
elif msg == "H":
buggy.forwards(speed=10)
elif msg == "X":
buggy.stop()
elif msg == "L":
buggy.left(speed=5, radius=100)
elif msg == "M":
buggy.left(speed=3, radius=50)
elif msg == "N":
buggy.left(speed=1, radius=5)
elif msg == "R":
buggy.right(speed=5, radius=100)
elif msg == "S":
buggy.right(speed=3, radius=50)
elif msg == "T":
buggy.right(speed=1, radius=5)
elif msg == "W":
buggy.spin_left(speed=1)
2.6. Radio for microbit on Maqueen
The code below moves the Maqueen.
from microbit import *
import radio
import maqueen
radio.config(group=8) # 0-255
radio.on()
buggy = maqueen.MaqueenMotors()
while True:
sleep(50)
msg = radio.receive()
if msg is not None:
display.show(msg)
if msg == "B":
buggy.backwards(speed=1)
elif msg == "C":
buggy.backwards(speed=3)
elif msg == "D":
buggy.backwards(speed=5)
elif msg == "F":
buggy.forwards(speed=1)
elif msg == "G":
buggy.forwards(speed=3)
elif msg == "H":
buggy.forwards(speed=5)
elif msg == "X":
buggy.stop()
elif msg == "L":
buggy.left(tightness=1)
elif msg == "M":
buggy.left(tightness=3)
elif msg == "N":
buggy.left(tightness=5)
elif msg == "R":
buggy.right(tightness=1)
elif msg == "S":
buggy.right(tightness=3)
elif msg == "T":
buggy.right(tightness=5)
elif msg == "W":
buggy.spin_left(speed=1)
2.7. Radio Racing
Tasks
Create an obstacle course and race another bot using radio controls.
Modify the speed settings to suit the obstacle course.
Nodify the B button pressing to allow backwards movement while turning.
Add a variable to keep track of the last msg sent and only send a new msg if it is different to the last msg.