MicroPython GSM Module Baudrate Finder

baudrateFinder.py

from machine import UART, Pin
import time


class GSM:
    def __init__(self, regulator, power):
        self._regulator = Pin(regulator, mode=Pin.OUT, value=False)
        self._power = Pin(power, mode=Pin.OUT, value=False)

        self._uartWizard: callable = None

    def restart(self):
        self._regulator.off()
        self._power.off()
        time.sleep_ms(100)

        self._regulator.on()
        self._power.on()
        time.sleep_ms(100)
        self._power.off()
        time.sleep_ms(50)
        self._power.on()

    def setUARTWizard(self, callback: callable):
        self._uartWizard = callback

    def setUART(self, baudrate: int):
        return self._uartWizard(baudrate)

    def isMeaningful(data):
        return data == b'\r\n*ATREADY: 1\r\n'

    def baudrateFind(self, baudrateRange: list[int] | tuple[int] = None):
        if baudrateRange is None:
            baudrateRange = [300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600,
                             1842000, 3686400]

        for baudrate in baudrateRange:

            self.restart()
            uart = self.setUART(baudrate)

            while not uart.any():
                pass

            data = uart.read()
            print(data, baudrate)
            if data and self.isMeaningful(data):
                print(f"Meaningful data received with baudrate: {baudrate}")
                break


regulatorPin=7
powerPin=8
uartID = 1
uartRX = 5
uartTX = 6

gsm = GSM(regulatorPin, powerPin)
gsm.baudrateFind()