commit d849f34cd39b56ef31c44cb18e5d4ac1df994548
Author: Ghassan Yusuf <ghassan.yousif.83@gmail.com>
Date:   Tue Jun 10 15:47:57 2025 +0300

    Add wifi.ino

diff --git a/wifi.ino b/wifi.ino
new file mode 100644
index 0000000..7a6f8ef
--- /dev/null
+++ b/wifi.ino
@@ -0,0 +1,124 @@
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+#include <FS.h>
+#include <SPIFFS.h>
+#include <WiFiManager.h>
+#include <ArduinoJson.h>
+
+// OLED display setup (on I2C bus 0)
+#define OLED_SDA 18
+#define OLED_SCL 19
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 32
+#define OLED_RESET    -1
+
+Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
+
+// Second I2C bus for other sensors/devices
+#define I2C2_SDA 1
+#define I2C2_SCL 2
+TwoWire I2C_Two = TwoWire(1);
+
+// MQTT/WiFi config
+char mqtt_server[40] = "";
+char mqtt_port[6] = "8080";
+char api_token[34] = "YOUR_API_TOKEN";
+bool shouldSaveConfig = false;
+
+void saveConfigCallback() {
+  shouldSaveConfig = true;
+  display.clearDisplay();
+  display.setCursor(0, 0);
+  display.println("Saving config...");
+  display.display();
+}
+
+void showStatus(const String& line1, const String& line2 = "", const String& line3 = "") {
+  display.clearDisplay();
+  display.setCursor(0, 0);
+  display.println(line1);
+  if (!line2.isEmpty()) display.println(line2);
+  if (!line3.isEmpty()) display.println(line3);
+  display.display();
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  // Start both I2C buses
+  Wire.begin(OLED_SDA, OLED_SCL);
+  I2C_Two.begin(I2C2_SDA, I2C2_SCL);
+
+  // OLED init
+  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
+    Serial.println("SSD1306 allocation failed");
+    while (1);
+  }
+  display.setTextSize(1);
+  display.setTextColor(WHITE);
+  showStatus("Booting...");
+
+  // Mount SPIFFS
+  if (!SPIFFS.begin(true)) {
+    showStatus("SPIFFS mount", "failed!");
+    delay(2000);
+  } else if (SPIFFS.exists("/config.json")) {
+    File configFile = SPIFFS.open("/config.json", "r");
+    if (configFile) {
+      DynamicJsonDocument json(256);
+      DeserializationError err = deserializeJson(json, configFile);
+      if (!err) {
+        strlcpy(mqtt_server, json["mqtt_server"] | "", sizeof(mqtt_server));
+        strlcpy(mqtt_port, json["mqtt_port"] | "8080", sizeof(mqtt_port));
+        strlcpy(api_token, json["api_token"] | "YOUR_API_TOKEN", sizeof(api_token));
+      }
+      configFile.close();
+    }
+  }
+
+  // WiFiManager parameters
+  WiFiManagerParameter custom_mqtt_server("server", "MQTT Server", mqtt_server, 40);
+  WiFiManagerParameter custom_mqtt_port("port", "MQTT Port", mqtt_port, 6);
+  WiFiManagerParameter custom_api_token("apikey", "API Token", api_token, 33);
+
+  WiFiManager wifiManager;
+  wifiManager.setSaveConfigCallback(saveConfigCallback);
+  wifiManager.addParameter(&custom_mqtt_server);
+  wifiManager.addParameter(&custom_mqtt_port);
+  wifiManager.addParameter(&custom_api_token);
+
+  showStatus("Connecting WiFi...");
+  if (!wifiManager.autoConnect("AutoConnectAP", "password")) {
+    showStatus("WiFi Connect", "Failed!", "Restarting...");
+    delay(3000);
+    ESP.restart();
+  }
+
+  // Update config values
+  strlcpy(mqtt_server, custom_mqtt_server.getValue(), sizeof(mqtt_server));
+  strlcpy(mqtt_port, custom_mqtt_port.getValue(), sizeof(mqtt_port));
+  strlcpy(api_token, custom_api_token.getValue(), sizeof(api_token));
+
+  // Save config if needed
+  if (shouldSaveConfig) {
+    DynamicJsonDocument json(256);
+    json["mqtt_server"] = mqtt_server;
+    json["mqtt_port"] = mqtt_port;
+    json["api_token"] = api_token;
+    File configFile = SPIFFS.open("/config.json", "w");
+    if (configFile) {
+      serializeJson(json, configFile);
+      configFile.close();
+    }
+  }
+
+  // Show final info (truncate to fit OLED)
+  String ipStr = WiFi.localIP().toString();
+  if (ipStr.length() > 15) ipStr = ipStr.substring(0, 15);
+  showStatus("WiFi OK: " + ipStr, "MQTT: " + String(mqtt_server), "Port: " + String(mqtt_port));
+}
+
+void loop() {
+  // You can use I2C_Two for other sensors/devices here
+}
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