Unit AudioPlayer N9301

import serial, time

ser = serial.Serial("/dev/serial0", 9600, timeout=0.5)

def cmd(c, *data):
    pkt = [c, (~c) & 0xFF, len(data), *data]
    pkt.append(sum(pkt) & 0xFF)          # checksum: 8 bits baixos da soma
    ser.reset_input_buffer()
    ser.write(bytes(pkt))
    time.sleep(0.5)                       # mínimo de 500 ms entre comandos
    return ser.read(32)

time.sleep(5)                             # espera o N9301 iniciar
cmd(0x06, 0x01, 15)                       # volume 15
cmd(0x0B, 0x01, 0x04)                     # modo: toca uma vez e para
cmd(0x04, 0x06, 0x00, 0x01)               # toca a faixa 1
print(cmd(0x04, 0x00).hex(" "))           # consulta status

#include <unit_audioplayer.hpp>

AudioPlayerUnit player;

void setup() {
  Serial.begin(115200);
  delay(5000);                                   // tempo de boot do N9301
  while (!player.begin(&Serial2, 22, 27)) {      // RX = IO22, TX = IO27
    Serial.println("Aguardando o AudioPlayer...");
    delay(1000);
  }
  player.setVolume(15);
  player.setPlayMode(AUDIO_PLAYER_MODE_SINGLE_STOP);
  player.playAudioByIndex(1);
}

void loop() {
  // exemplo: tocar a faixa 2 ao tocar na tela (integre com seu handler de touch)
}

#include <M5Unified.h>
#include <unit_audioplayer.hpp>

AudioPlayerUnit player;

void setup() {
  auto cfg = M5.config();
  M5.begin(cfg);
  M5.Power.setExtOutput(true);                 // 5 V no Grove
  delay(5000);
  while (!player.begin(&Serial1, 2, 1)) {      // RX = G2, TX = G1
    delay(1000);
  }
  player.setVolume(15);
  player.playAudioByIndex(1);
}

void loop() { M5.update(); }