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dfplayer.py

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from machine import UART

from utime import sleep_ms

class SimpleDFPlayerMini:

def __init__(self, tx_pin, baudrate=9600):

self._uart = UART(tx_pin, baudrate=baudrate)

self._send_cmd(0x09, 1)

self.set_eq(1)

self.pause()

def _send_cmd(self, cmd, data_low=0, data_high=0):

self._uart.write(b'\x7E')

self._uart.write(b'\xFF')

self._uart.write(b'\x06')

self._uart.write(bytes([cmd]))

self._uart.write(b'\x00')

self._uart.write(bytes([data_high]))

self._uart.write(bytes([data_low]))

self._uart.write(b'\xEF')

sleep_ms(200)

def next_track(self):

self._send_cmd(0x01)

def prev_track(self):

self._send_cmd(0x02)

def sel_track(self, track_index):

self._send_cmd(0x03, track_index)

def inc_vol(self):

self._send_cmd(0x04)

def dec_vol(self):

self._send_cmd(0x05)

def set_vol(self, volume):

self._send_cmd(0x06, volume)

def set_eq(self, equalizer):

self._send_cmd(0x07, equalizer)

def set_mode(self, mode):

self._send_cmd(0x08, mode)

def suspend(self):

self._send_cmd(0x0A)

def resume(self):

self._send_cmd(0x0B)

def reset(self):

self._send_cmd(0x0C)

def play(self):

self._send_cmd(0x0D)

def pause(self):

self._send_cmd(0x0E)

def set_folder(self, folder_index):

self._send_cmd(0x0F, folder_index)

def enable_loop(self):

self._send_cmd(0x11, 1)

def disable_loop(self):

self._send_cmd(0x11, 0)