帮我生成一段代码可以使esp32使用iis格式录音并上传至mqtt服务器
时间: 2024-01-07 14:03:26 浏览: 118
物联网MQTT在ESP32上实现连接的工程代码
好的,请稍等,我正在为您生成代码。
```cpp
#include <WiFi.h>
#include <PubSubClient.h>
#include "driver/i2s.h"
#define WIFI_SSID "your-WiFi-SSID"
#define WIFI_PASS "your-WiFi-password"
#define MQTT_SERVER "your-MQTT-server-IP"
#define MQTT_PORT 1883
#define MQTT_USER "your-MQTT-username"
#define MQTT_PASS "your-MQTT-password"
// Number of samples to read at once
#define SAMPLES_PER_READ 128
// I2S Constants
static constexpr int SAMPLE_RATE = 16000; // 16 kHz
static constexpr int BITS_PER_SAMPLE = 16;
// Ring buffer constants
static constexpr int RING_BUFFER_SIZE = 8192;
static uint8_t ringBuffer[RING_BUFFER_SIZE] = {0};
static volatile uint32_t ringBufferIndex = 0;
// Wifi client
WiFiClient wifiClient;
// MQTT client
PubSubClient mqttClient(wifiClient);
// Interrupt that reads samples from the I2S microphone
void IRAM_ATTR i2s_isr()
{
static constexpr int BYTES_PER_SAMPLE = BITS_PER_SAMPLE / 8;
static uint8_t buffer[SAMPLES_PER_READ * BYTES_PER_SAMPLE] = {0};
size_t bytesRead = i2s_read(I2S_NUM_0, buffer, SAMPLES_PER_READ * BYTES_PER_SAMPLE, portMAX_DELAY);
if (bytesRead > 0)
{
for (size_t i = 0; i < bytesRead; i += BYTES_PER_SAMPLE)
{
// Store the data in the ring buffer
if (ringBufferIndex >= RING_BUFFER_SIZE)
{
// Buffer overflow
ringBufferIndex = 0;
}
ringBuffer[ringBufferIndex] = buffer[i];
ringBufferIndex++;
}
}
}
void setup()
{
// Connect to WiFi
WiFi.begin(WIFI_SSID, WIFI_PASS);
while (WiFi.status() != WL_CONNECTED)
{
delay(1000);
}
// Set up MQTT client
mqttClient.setServer(MQTT_SERVER, MQTT_PORT);
mqttClient.setCredentials(MQTT_USER, MQTT_PASS);
while (!mqttClient.connected())
{
mqttClient.connect("ESP32");
delay(1000);
}
// Set up IIS
i2s_config_t i2sConfig = {
.mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX),
.sample_rate = SAMPLE_RATE,
.bits_per_sample = i2s_bits_per_sample_t(BITS_PER_SAMPLE),
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
.communication_format = I2S_COMM_FORMAT_I2S,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
.dma_buf_count = 2,
.dma_buf_len = SAMPLES_PER_READ * BITS_PER_SAMPLE / 8,
.use_apll = false};
i2s_pin_config_t i2sPins = {
.bck_io_num = 26,
.ws_io_num = 25,
.data_out_num = I2S_PIN_NO_CHANGE,
.data_in_num = 33};
i2s_driver_install(I2S_NUM_0, &i2sConfig, 0, nullptr);
i2s_set_pin(I2S_NUM_0, &i2sPins);
i2s_zero_dma_buffer(I2S_NUM_0);
// Set up interrupt
esp_intr_alloc(ETS_I2S0_INTR_SOURCE, ESP_INTR_FLAG_IRAM, &i2s_isr, nullptr, nullptr);
}
void loop()
{
// Wait until we have enough data
while (ringBufferIndex < RING_BUFFER_SIZE / 2)
{
delay(10);
}
// Prepare the data for MQTT
uint8_t data[RING_BUFFER_SIZE] = {0};
uint32_t dataIndex = 0;
for (uint32_t i = ringBufferIndex; i < RING_BUFFER_SIZE; i++)
{
data[dataIndex] = ringBuffer[i];
dataIndex++;
}
for (uint32_t i = 0; i < ringBufferIndex; i++)
{
data[dataIndex] = ringBuffer[i];
dataIndex++;
}
// Publish the data to MQTT
mqttClient.publish("esp32/iis-recording", data, RING_BUFFER_SIZE);
}
```
这是用于 ESP32 的 IIS 录音并上传至 MQTT 服务器的代码。请将其中的 WIFI_SSID、WIFI_PASS、MQTT_SERVER、MQTT_PORT、MQTT_USER 和 MQTT_PASS 改为您自己的 Wi-Fi 和 MQTT 信息,并将这段代码上传到 ESP32 即可开始录音并上传数据到 MQTT 服务器。
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