ESP32C3在arduino串口监视中无法打印数据

如题。串口波特率已经选择921600，求各位大佬解答。

void setup() {
  // put your setup code here, to run once:
  Serial.begin(921600);
  Serial.printf("hello world");
  WiFi.begin(id,psw);
  while (WiFi.status()!=WL_CONNECTED) {
    delay(500);
    Serial.println("正在连接...");
  }
  Serial.println("连接成功！");
  client.setServer(mqttBroke,port);
  client.setCallback(callback);
  while (!client.connected()) {
    String client_id = "esp32-client-";
    client_id += String(WiFi.macAddress());
    Serial.printf("The client %s connects to the public mqtt broker\n", client_id.c_str());
    if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
        Serial.println("Public emqx mqtt broker connected");
    } else {
        Serial.print("failed with state ");
        Serial.print(client.state());
        delay(2000);
    }
  }
  client.subscribe(topic);
  client.publish(topic,"esp32 conected to mqtt!");
  pinMode(12,OUTPUT);
    // pwmTimerConfig->speed_mode = LEDC_LOW_SPEED_MODE;
    // pwmTimerConfig->timer_num = LEDC_TIMER_0;
    // pwmTimerConfig->freq_hz = FREQ;
    // pwmTimerConfig->clk_cfg = LEDC_USE_APB_CLK;
    // pwmTimerConfig->duty_resolution = LEDC_TIMER_8_BIT;
    // ledc_timer_config(pwmTimerConfig);
    // pwmChannelConfig->gpio_num = 12;
    // pwmChannelConfig->speed_mode = LEDC_LOW_SPEED_MODE;
    // pwmChannelConfig->channel = LEDC_CHANNEL_0;
    // pwmChannelConfig->intr_type = LEDC_INTR_DISABLE;
    // pwmChannelConfig->timer_sel = LEDC_TIMER_0;
    // pwmChannelConfig->duty = 0;
    // pwmChannelConfig->hpoint = 0;
    // ledc_channel_config(pwmChannelConfig);

}

void callback(char *topic, byte *payload, unsigned int length) {
    Serial.print("Message arrived in topic: ");
    Serial.println(topic);
    Serial.print("Message:");
    for (int i = 0; i < length; i++) {
        Serial.print((char) payload);
    }
    Serial.println();
    Serial.println("-----------------------");
    switch(payload[0])
    {
      case '0':
        digitalWrite(12,0);
        break;
      case '1':
        digitalWrite(12,1);
        break;
      default:
        Serial.println("???");
        break;
    }   
}

void reconnect() {
  while (!client.connected()) {
    Serial.println("Reconnecting to MQTT broker...");
    String client_id = "esp8266-client-";
    client_id += String(WiFi.macAddress());
    if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
        Serial.println("Reconnected to MQTT broker.");
        client.subscribe(topic);
    } else {
        Serial.print("Failed to reconnect to MQTT broker, rc=");
        Serial.print(client.state());
        Serial.println("Retrying in 5 seconds.");
        delay(5000);
    }
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  // for (uint8_t i = 0; i < pow(RESOLUTION,2)-1; i++)
  // {
  //   ledc_set_duty(LEDC_LOW_SPEED_MODE,LEDC_CHANNEL_0,i);
  //   ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
  //   delay(1000);
  // }

  // for (uint8_t i = pow(RESOLUTION,2)-1; i > 0 ; i--)
  // {
  //   ledc_set_duty(LEDC_LOW_SPEED_MODE,LEDC_CHANNEL_0,i);
  //   ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
  //   delay(1000);
  // }

}

单独测试串口打印是否可以？

DFEDU 发表于 2023-12-7 17:06
单独测试串口打印是否可以？

还是不行