15DecDecember 15, 2025

ESP32 with TCS34725 RGB Sensor

🎨 What is the TCS34725?The TCS34725 is a color sensor made by AMS (now part of Renesas).It detects Red, Green, Blue, and Clear light (ambient).🧠 Key Features:Detects RGB colorsI2C interface (perfect for ESP32)Built-in IR filter for accurate color detectionBuilt-in white LED for illuminationMeasures light intensity (lux) and color temperature (K)🧰 What You NeedComponentDescriptionESP32 boardAny variant (e.g., DevKit V1)TCS34725 sensor moduleUsually via I2CJumper wiresFemale-to-male if neededLibraryAdafruit_TCS34725📌 TCS34725 PinoutTCS34725 PinConnect To ESP32VIN3.3V or 5VGNDGNDSDAGPIO 21 (I2C SDA)SCLGPIO 22 (I2C SCL)You can change SDA/SCL in software if needed, but 21/22 are default.📚 Step 1: Install Libraries in Arduino IDEGo to Sketch...

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15DecDecember 15, 2025

ESP32 + I2C LCD for Real-Time Feedback

📘 What is an I2C LCD?An I2C LCD is a Liquid Crystal Display that uses the I2C communication protocol to show text data. It's widely used in embedded and IoT projects to display information such as temperature, sensor values, time, and status messages.✅ Key Features:Displays text only (not graphics)Usually 16x2 (16 characters x 2 lines) or 20x4Has an I2C backpack (PCF8574 chip) that allows communication using just 2 pins: SDA (data) and SCL (clock)Saves GPIO pins, compared to traditional 6- or 8-pin LCD control🧰 Components UsedComponentDescriptionESP32 Dev BoardMicrocontroller (WiFi + BLE)I2C LCD 16x2Text display with I2C backpackJumper WiresMale-to-female...

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15DecDecember 15, 2025

Smart Farming : ESP32 with Soil Moisture Sensor

How Soil Moisture Sensor Works and Interface it with Esp32When you hear the term “smart garden,” one of the first things that might come to mind is a setup that automatically keeps your plants healthy—measuring how dry the soil is and watering plants only when they need it. No more guessing, no more soggy roots, and no more thirsty plants!With the help of a simple Soil Moisture Sensor, you can build a system that knows exactly when your garden needs...

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15DecDecember 15, 2025

Control in Your Hands: ESP32 with 2-Axis Joystick

🔧 What is an Analog Joystick?An analog joystick typically has:2 potentiometers (one for X-axis, one for Y-axis)1 push button (built-in, press down on the joystick)📤 Joystick Outputs:X-axis → Analog voltage (0V to Vcc) depending on horizontal tilt.Y-axis → Analog voltage depending on vertical tilt.SW (Switch) → Digital LOW when pressed, HIGH when idle (pull-up resistor inside).🧰 Components Required:ESP32 (DevKit v1 or any compatible board)Analog Joystick Module (usually with 5 pins)Jumper wiresBreadboard (optional)USB cable to program ESP32⚙️ Pinout of Joystick:Joystick PinFunctionConnect to ESP32GNDGroundGND+5V / VCCPower Supply3.3V...

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15DecDecember 15, 2025

Smart Control: Stepper Motor with ESP32

🔍 What is the 28BYJ-48 Stepper Motor?The 28BYJ-48 is a 5V unipolar stepper motor with a built-in reduction gearbox. This makes it ideal for applications requiring precise control at low speed.🧾 SpecificationsSpecificationValueMotor TypeUnipolar StepperRated Voltage5V DCNumber of Phases4Coil Resistance~50Ω per coilStep Angle (before gearbox)11.25°Gear Reduction Ratio~64:1 (actually ~63.68395:1)Steps Per Revolution (output shaft)2048 stepsHolding Torque~300 gf·cmWires5Max Current~240mA (safe at ~100–200mA)🔁 How Does It Work?The motor has 4 coils and a common wire (VCC).Coils are energized in a sequence to rotate the internal rotor.The gearbox slows down output but increases torque and precision.⚙️ Full Output Shaft...

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