monitor speed

platformio.ini

@@ -12,5 +12,6 @@
 platform = espressif32
 board = esp32-devkitlipo
 framework = arduino
-monitor_speed = 115200
-lib_deps = esphome/ESP32-audioI2S@^2.0.7
+monitor_speed = 9600
+
+

src/main.cpp

@@ -1,70 +1,116 @@
 /*
-Simple Internet Radio Demo
-esp32-i2s-simple-radio.ino
-Simple ESP32 I2S radio
-Uses MAX98357 I2S Amplifier Module
-Uses ESP32-audioI2S Library - https://github.com/schreibfaul1/ESP32-audioI2S
+  ESP32 I2S Microphone Sample
+  esp32-i2s-mic-sample.ino
+  Sample sound from I2S microphone, display on Serial Plotter
+  Requires INMP441 I2S microphone
 
-DroneBot Workshop 2022
-https://dronebotworkshop.com
+  DroneBot Workshop 2022
+  https://dronebotworkshop.com
 */
+#include <Arduino.h>
+// Include I2S driver
+#include <driver/i2s.h>
 
-// Include required libraries
-#include "Arduino.h"
-#include "WiFi.h"
-#include "Audio.h"
+// Connections to INMP441 I2S microphone
+#define I2S_WS 25
+#define I2S_SD 33
+#define I2S_SCK 32
 
-// Define I2S connections
-#define I2S_DOUT 22
-#define I2S_BCLK 26
-#define I2S_LRC 25
+// Use I2S Processor 0
+#define I2S_PORT I2S_NUM_0
 
-// Create audio object
-Audio audio;
+// Define input buffer length
+#define bufferLen 1024
+int16_t sBuffer[bufferLen];
 
-// Wifi Credentials
-String ssid = "cohabit";
-String password = "lewifidecohabit";
+void i2s_install()
+{
+    // Set up I2S Processor configuration
+    const i2s_config_t i2s_config = {
+        .mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX),
+        .sample_rate = 44100,
+        .bits_per_sample = i2s_bits_per_sample_t(16),
+        .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
+        .communication_format = i2s_comm_format_t(I2S_COMM_FORMAT_STAND_I2S),
+        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
+        .dma_buf_count = 4,
+        .dma_buf_len = bufferLen,
+        .use_apll = false,
+        .tx_desc_auto_clear = false,
+        .fixed_mclk = 0};
+
+    i2s_driver_install(I2S_PORT, &i2s_config, 0, NULL);
+}
+
+void i2s_setpin()
+{
+    // Set I2S pin configuration
+    const i2s_pin_config_t pin_config = {
+        .bck_io_num = I2S_SCK,
+        .ws_io_num = I2S_WS,
+        .data_out_num = -1,
+        .data_in_num = I2S_SD};
+
+    i2s_set_pin(I2S_PORT, &pin_config);
+}
 
 void setup()
 {
 
-// Start Serial Monitor
-Serial.begin(115200);
+    // Set up Serial Monitor
+    Serial.begin(115200);
+    Serial.println(" ");
 
-// Setup WiFi in Station mode
-WiFi.disconnect();
-WiFi.mode(WIFI_STA);
-WiFi.begin(ssid.c_str(), password.c_str());
+    delay(1000);
 
-while (WiFi.status() != WL_CONNECTED)
-{
-delay(500);
-Serial.print(".");
-}
+    // Set up I2S
+    i2s_install();
+    i2s_setpin();
+    i2s_start(I2S_PORT);
 
-// WiFi Connected, print IP to serial monitor
-Serial.println("");
-Serial.println("WiFi connected");
-Serial.println("IP address: ");
-Serial.println(WiFi.localIP());
-Serial.println("");
-Serial.print("connected");
-
-// Connect MAX98357 I2S Amplifier Module
-audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
-Serial.print("coucou");
-
-// Set thevolume (0-100)
-audio.setVolume(100);
-Serial.println("toto");
-audio.connecttohost("http://194.97.151.146/antenne");
-Serial.println("connexion antenne");
+    delay(500);
 }
 
 void loop()
-
 {
-//Run audio player
-audio.loop();
-}
+
+    // False print statements to "lock range" on serial plotter display
+    // Change rangelimit value to adjust "sensitivity"
+    int rangelimit = 3000;
+    Serial.print(rangelimit * -1);
+    Serial.print(" ");
+    Serial.print(rangelimit);
+    Serial.print(" ");
+
+    // Get I2S data and place in data buffer
+    size_t bytesIn = 0;
+    esp_err_t result = i2s_read(I2S_PORT, &sBuffer, bufferLen, &bytesIn, portMAX_DELAY);
+
+    if (result == ESP_OK)
+    {
+        // Read I2S data buffer
+        int16_t samples_read = bytesIn / 8;
+        if (samples_read > 0)
+        {
+            float mean = 0;
+            for (int16_t i = 0; i < samples_read; ++i)
+            {
+                mean += (sBuffer[i]);
+            }
+
+            // Average the data reading
+            mean /= samples_read;
+
+            // Print to serial plotter
+            Serial.println(mean);
+
+            int recu = bytesIn / sizeof(int32_t);
+            for (int i = 0; i < recu; i++)
+            {
+                Serial.printf("%ld\n", sBuffer[i]);
+            }
+            // Serial.print(" - ");
+            Serial.println(bytesIn);
+        }
+    }
+}