Update the Receiver cyber:bot Script

The transmitter micro:bit should still be running the same script from the previous activity.  That’s radio_tilt_controller_w_stop_range.

Now for the new cyber:bot receiver script!

Example script: radio_tilt_bot_fb_lr_with_stop_range

• Set the cyber:bot board’s PWR switch to 0.
• Make sure you are working in the browser with the micro:bit Python Editor that is connected to the radio tilt controlled cyber:bot.
• If the radio_tilt_bot_fb_with_stop_range script isn’t already open, click Open, and find and open it.
• Change the project name to radio_tilt_bot_fb_lr_with_stop_range. 
• Update the script to match the one below.
• If you are in a classroom, adjust the channel= in the script to your assigned channel.
• Click Save, and then click Send to micro:bit.  

# radio_tilt_bot_fb_lr_with_stop_range

from cyberbot import *
import radio

radio.on()
radio.config(channel=7, queue=1, length=64)

while True:

    packet = radio.receive()

    if packet:

        dictionary = eval(packet)

        x = dictionary.get('x')
        y = dictionary.get('y')
        needle = dictionary.get('needle')
        
        fb = y / 10
        lr = x / 10

        if abs(fb) > 8:
            display.show(Image.ALL_CLOCKS[needle])
            vL = fb
            vR = -fb

            if(fb < 0): lr = -lr
            vL = vL - lr
            vR = vR - lr

        else:
            display.show(Image.DIAMOND_SMALL)

        bot(18).servo_speed(vL)
        bot(19).servo_speed(vR)   

• Set the cyber:bot board PWR switch to 1.
• Repeat the needle/diamond display tests from the previous activity.
• Set the cyber:bot board PWR switch to 2.
• Now, tilt the micro:bit transmitter in the directions shown in the table, and verify that the cyber:bot moves as expected: