Added ESP32 side of the transceiver

ESP_32_Transmitter.ino

@@ -0,0 +1,120 @@
+#include <WiFi.h>
+#include <WiFiUdp.h>
+#include <driver/i2s_std.h> 
+//Pin configurations for I2S
+#define SCK_PIN GPIO_NUM_11
+#define LRCK_PIN GPIO_NUM_12
+#define SDOUT_PIN GPIO_NUM_13
+#define CONFIG_LWIP_UDP_RECVMBOX_SIZE 64
+//task function declarations
+void udpReceiveTask(void *args);
+void i2sTask(void *args);
+void i2sInit();
+i2s_chan_handle_t tx_handle;
+const char* ssid = "ESP32-ACCESS-POINT";
+const char* password = "Denis171ESP32";
+WiFiUDP udp;
+//Set up wifi addresses
+const int udpPort = 3333;
+IPAddress local_ip(192,168,4,1);
+IPAddress gateway(192,168,4,1);
+IPAddress subnet(255,255,255,0);
+QueueHandle_t packetQueue;
+void setup() {
+  //Start serial to log activity 
+  Serial.begin(115200);
+  delay(1000);
+  Serial.println("BOOT OK");
+  //Make a queue to store & transmit packets
+  packetQueue = xQueueCreate(20,sizeof(int32_t)*256);
+  Serial.println("Setting up WiFi config...");
+
+  WiFi.setSleep(false);
+  //set a designated ip 
+  WiFi.softAPConfig(local_ip,gateway,subnet);
+  //set ssid and password for the AP
+  WiFi.softAP(ssid,password,6);
+
+  delay(500);  // ← give the AP time to come up
+  Serial.println(WiFi.softAPIP()); 
+  
+  udp.begin(udpPort);
+  Serial.printf("UDP listening on port:%d\n",udpPort);
+  i2sInit();
+  xTaskCreatePinnedToCore(udpReceiveTask,"recTask",8192,NULL,5,NULL,0);
+  xTaskCreatePinnedToCore(i2sTask,"i2sTask",8192,NULL,4,NULL,1);
+}
+void loop() { 
+vTaskDelay(portMAX_DELAY);
+}
+void udpReceiveTask(void *args){
+  static uint8_t buffer[1024];
+  //static int packetCount = 0;
+  //data = will hold 32bit representation of buffer
+  static int32_t data[256] = {0};
+  while(true){
+    
+    if(udp.parsePacket()){
+      int count = 0;
+      int len = udp.read(buffer,sizeof(buffer));
+      //if the length isn't divisible by 4 the packet is not at least 32 bits
+      if(len != 1024){
+        Serial.printf("RX packet size: %d\n", len);
+        continue;
+      }
+    //packetCount++;
+    //logging 
+    /*if (packetCount <= 10) {
+      Serial.printf("\nPacket #%d len=%d\n", packetCount, len);
+      for (int i = 0; i < 32; i++) {
+        Serial.printf("%02X ", buffer[i]);
+      }
+      Serial.println();
+    } */
+      count = len / 4;
+      for(int i=0; i<count; i++){
+        memcpy(&data[i],&buffer[i*4],4);
+      }
+      //args = queue, data, non-blocking
+      xQueueSend(packetQueue,data,0);
+    }
+    vTaskDelay(1);
+  }
+  
+}
+void i2sTask(void *args){
+  while(true){
+    size_t bytesWritten;
+    //args = queue, data, non-blocking
+    int32_t buffer[256] = {0};
+    xQueueReceive(packetQueue,buffer,portMAX_DELAY);
+    // for(int i=0; i<sizeof(buffer)/sizeof(buffer[0]); i++){
+    //   buffer[i] = __builtin_bswap32(buffer[i]);
+    // }
+    //Write to the I2S
+    i2s_channel_write(tx_handle,buffer,sizeof(buffer),&bytesWritten,portMAX_DELAY);
+      if(bytesWritten >= 32){
+        for (int i = 0; i < 32; i++) {
+          Serial.printf("%02X ", buffer[i]);
+        }
+      }
+  }
+}
+void i2sInit(){
+  i2s_chan_config_t chan_config = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0,I2S_ROLE_MASTER);
+  ESP_ERROR_CHECK(i2s_new_channel(&chan_config,&tx_handle,NULL));
+  i2s_std_config_t std_cfg = {
+    .clk_cfg = I2S_STD_CLK_DEFAULT_CONFIG(44100),
+    .slot_cfg = I2S_STD_MSB_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_32BIT,I2S_SLOT_MODE_STEREO),
+    // .slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_32BIT,I2S_SLOT_MODE_STEREO),
+    .gpio_cfg = {
+        .mclk = I2S_GPIO_UNUSED,
+        .bclk = SCK_PIN,
+        .ws   = LRCK_PIN,
+        .dout = SDOUT_PIN,
+        .din  = I2S_GPIO_UNUSED,
+    },
+  };
+  ESP_ERROR_CHECK(i2s_channel_init_std_mode(tx_handle, &std_cfg));
+  ESP_ERROR_CHECK(i2s_channel_enable(tx_handle));
+}