Bluetooth HC-05 master-slave configuration using CircuitPython.

code.py

"""
  Bluetooth HC-05 master-slave configuration using CircuitPython
  
  Items:
  - Maker Pi Pico
    https://my.cytron.io/p-maker-pi-pico
  - Bluetooth Serial Transceiver HC-05
    https://my.cytron.io/p-bluetooth-serial-transceiver-hc-05
  - USB Micro B Cable
    https://my.cytron.io/p-usb-micro-b-cable
  - Grove 4 Pin Buckled to Female Cable
    https://my.cytron.io/p-grove-4-pin-buckled-to-female-cable
  
  References:
  - https://howtomechatronics.com/tutorials/arduino/how-to-configure-pair-two-hc-05-bluetooth-module-master-slave-commands/
  
  Last update: 30 May 2022
"""

import board
import busio

hc05 = busio.UART(board.GP4, board.GP5, baudrate=38400)

while True:
    command = input() + "\r\n"
    hc05.write(bytes(command, 'ascii'))
    while True:
        response = hc05.readline()
        if response == None:
            break
        print(str(response, 'UTF-8'))