ESP32C3在arduino串口监视中无法打印数据
2023-12-065471
AI 快速预览详细
本文解决了在使用 ESP32C3 进行 Arduino 开发时，串口监视器无法打印数据的问题。通过设置波特率为921600，并检查代码中的 Serial.begin() 和 Serial.printf() 函数，确保串口初始化和数据输出正确。文章提供了详细的故障排查步骤，帮助开发者快速定位并修复问题，节省了自行排查的时间成本。
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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); // } } |
