Your Turn: Handle Transmitter Exceptions

The same simple approach for prototyping that was used in tethered control can also be used here.

Example script: terminal_bot_controller_wireless_your_turn.py

  • Modify the script as shown below.  
  • Flash the script into the micro:bit
# terminal_bot_controller_wireless_your_turn.py

from microbit import *
import radio

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

sleep(1000)

print("\nSpeeds are -100 to 100\n")

while True:
    try:
        vL = int(input("Enter left speed: "))
        vR = int(input("Enter right speed: "))
        ms = int(input("Enter ms to run: "))

        dictionary = {  }
        dictionary['vL'] = vL
        dictionary['vR'] = vR
        dictionary['ms'] = ms

        packet = str(dictionary)
    
        print("Send: ", packet)
        radio.send(packet)
    
        print()

    except:
        print("Error in value entered.")
        print("Please try again. \n")
  • Open the terminal.
  • Try valid numbers and verify that it still works.
  • Try entering characters like ABC for one of the prompts, and verify that it displays the helpful "Error in value entered. " and "Please try again. " messages.