From 7e11450076c6528e5b9ec6a4c318defdafdf945d Mon Sep 17 00:00:00 2001
From: Ghassan Yusuf <ghassan.yousif.83@gmail.com>
Date: Sat, 21 Jun 2025 14:29:53 +0300
Subject: [PATCH] Upload files to "src/i2c/esp32s3_dual_i2c"

---
 src/i2c/esp32s3_dual_i2c/esp32s3_dual_i2c.ino | 111 ++++++++++--------
 src/i2c/esp32s3_dual_i2c/functions.ino        |   9 ++
 src/i2c/esp32s3_dual_i2c/i2c_functions.ino    |  52 ++++++++
 3 files changed, 126 insertions(+), 46 deletions(-)
 create mode 100644 src/i2c/esp32s3_dual_i2c/functions.ino
 create mode 100644 src/i2c/esp32s3_dual_i2c/i2c_functions.ino

diff --git a/src/i2c/esp32s3_dual_i2c/esp32s3_dual_i2c.ino b/src/i2c/esp32s3_dual_i2c/esp32s3_dual_i2c.ino
index cb1d57b..ee750ce 100644
--- a/src/i2c/esp32s3_dual_i2c/esp32s3_dual_i2c.ino
+++ b/src/i2c/esp32s3_dual_i2c/esp32s3_dual_i2c.ino
@@ -1,47 +1,66 @@
-#include <Wire.h>
-#include <Adafruit_GFX.h>
-#include <Adafruit_SSD1306.h>
-
-#define OLED_WIDTH 128
-#define OLED_HEIGHT 32
-#define OLED_RESET -1
-#define OLED_ADDR 0x3C
-
-// Master bus 1 (OLED): SDA 2, SCL 3
-#define SDA_1 2
-#define SCL_1 3
-
-// Master bus 2 (just for demo, not slave): SDA 4, SCL 5
-#define SDA_2 4
-#define SCL_2 5
-
-TwoWire I2Cone = TwoWire(0);
-Adafruit_SSD1306 display(OLED_WIDTH, OLED_HEIGHT, &I2Cone, OLED_RESET);
-
-TwoWire I2Ctwo = TwoWire(1);
-
-void setup() {
-  Serial.begin(115200);
-
-  // Initialize first I2C bus (OLED)
-  I2Cone.begin(SDA_1, SCL_1, 100000);
-  if(!display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) {
-    Serial.println("OLED allocation failed");
-    while(1);
-  }
-  display.clearDisplay();
-  display.setTextSize(1);
-  display.setTextColor(SSD1306_WHITE);
-  display.setCursor(0,0);
-  display.println("Hello, ESP32-S3!");
-  display.display();
-
-  // Initialize second I2C bus (just for demo, not slave)
-  I2Ctwo.begin(0x55, SDA_2, SCL_2, 100000);
-  // You could scan for devices or use another I2C device here
-}
-
-void loop() {
-  // Nothing to do here for this simple example
-  delay(1000);
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+#define OLED_WIDTH 128
+#define OLED_HEIGHT 32
+#define OLED_RESET -1
+#define OLED_ADDR 0x3C
+
+// Master bus 1 (OLED): SDA 2, SCL 3
+#define SDA_1 2
+#define SCL_1 3
+
+// Master bus 2 (just for demo, not slave): SDA 4, SCL 5
+#define SDA_2 4
+#define SCL_2 5
+
+// Master I2C
+TwoWire I2Cone = TwoWire(0);
+
+// OLED Display
+Adafruit_SSD1306 display(OLED_WIDTH, OLED_HEIGHT, &I2Cone, OLED_RESET);
+
+// Slave I2C
+TwoWire I2Ctwo = TwoWire(1);
+
+// NEW Datatype For State
+enum _state { NOT_READY, READY, SENDING };
+
+// Variables
+// _state  state = NOT_READY;
+_state  state = READY;
+
+
+void setup() {
+
+  Serial.begin(115200);
+  Serial.println();
+  Serial.println("ESP32S3 System Started !");
+
+  // Initialize first I2C bus (OLED)
+  I2Cone.begin(SDA_1, SCL_1, 100000);
+
+  // Starting OLED
+  if(!display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) {
+    Serial.println("OLED allocation failed");
+    while(1);
+  }
+
+  // Display OLED Message
+  oled_write("Hello, ESP32-S3!");
+
+  // On Receive Data
+  I2Ctwo.onReceive(i2c_received);
+  I2Ctwo.onRequest(i2c_request);
+
+  // Initialize second I2C bus (just for demo, not slave)
+  I2Ctwo.begin(0x55, SDA_2, SCL_2, 100000);
+  // You could scan for devices or use another I2C device here
+
+}
+
+void loop() {
+  // Nothing to do here for this simple example
+  delay(1000);
 }
\ No newline at end of file
diff --git a/src/i2c/esp32s3_dual_i2c/functions.ino b/src/i2c/esp32s3_dual_i2c/functions.ino
new file mode 100644
index 0000000..8b7235d
--- /dev/null
+++ b/src/i2c/esp32s3_dual_i2c/functions.ino
@@ -0,0 +1,9 @@
+  // OLED Display
+  void oled_write(String message) {
+    display.clearDisplay();
+    display.setTextSize(1);
+    display.setTextColor(SSD1306_WHITE);
+    display.setCursor(0, 0);
+    display.println(message);
+    display.display();
+  }
\ No newline at end of file
diff --git a/src/i2c/esp32s3_dual_i2c/i2c_functions.ino b/src/i2c/esp32s3_dual_i2c/i2c_functions.ino
new file mode 100644
index 0000000..9143968
--- /dev/null
+++ b/src/i2c/esp32s3_dual_i2c/i2c_functions.ino
@@ -0,0 +1,52 @@
+
+  void i2c_received(int data) {
+
+    // Read If Available
+    if(I2Ctwo.available()) {
+      
+      // Calculate Data Length
+      uint8_t datalength = I2Ctwo.read();
+
+      // Creating Data Array Based On Data Length
+      uint8_t data[datalength];
+
+      // Data Buffer
+      String message;
+
+      // Assembling Message Data
+      for(int i=0; i<datalength; i++) {
+        message += char(I2Ctwo.read());
+      }
+
+      // Printe Received Message
+      Serial.println("Message : " + message);
+
+    }
+
+  }
+
+  void i2c_request() {
+
+    if(state == READY) {
+      I2Ctwo.write(char('Y'));
+      Serial.println("Requested Data : Ready");
+      state = SENDING;
+    } else if(state == SENDING) {
+      
+      uint8_t data[6] = { 'H', 'E', 'L', 'L', 'O', 'W' };
+
+      for(int i=0; i<6; i++) {
+        I2Ctwo.write(data[i]);
+        Serial.print(data[i]);
+      }
+
+      Serial.println("Requested Data : Ready -> Sending");
+      state = NOT_READY;
+
+    } else {
+      I2Ctwo.write(char('N'));
+      Serial.println("Requested Data : Not Ready");
+      state = NOT_READY;
+    }
+
+  }
\ No newline at end of file