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Revise hardware components and power supply details
Updated hardware requirements and wiring details in README.
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@@ -39,10 +39,11 @@ The original project provided the foundation for this enhanced version, which ad
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## 📋 Hardware Requirements
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## 📋 Hardware Requirements
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### Main Components
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### Main Components
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- **ESP32 Development Board** (any ESP32 variant)
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- **ESP32 Wemos D1 Mini** (recommended - compact ESP32 development board)
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- **JSY Energy Meter** with Modbus RTU over RS485
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- **JSY-MK-194G Energy Meter** with Modbus RTU over RS485
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- **SSD1306 128x64 OLED Display** (I2C)
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- **SSD1306 128x64 OLED Display** (I2C)
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- **RS485 to TTL Converter Module** (for Modbus communication)
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- **RS485 to TTL Converter Module** (for Modbus communication)
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- **Meanwell APV-8-5 5V 8W Power Supply** (for system power)
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### Optional Components
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### Optional Components
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- **3D Printed Enclosure** (see hardware guide)
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- **3D Printed Enclosure** (see hardware guide)
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@@ -52,7 +53,7 @@ The original project provided the foundation for this enhanced version, which ad
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### Wiring Requirements
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### Wiring Requirements
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- **UART Pins**: TX (GPIO17), RX (GPIO16)
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- **UART Pins**: TX (GPIO17), RX (GPIO16)
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- **I2C Pins**: SDA (GPIO21), SCL (GPIO22)
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- **I2C Pins**: SDA (GPIO21), SCL (GPIO22)
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- **Power Supply**: 3.3V and 5V rails
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- **Power Supply**: 5V external supply to ESP32 +5V pin, ESP32 3.3V powers all peripherals
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## 🔧 Installation & Setup
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## 🔧 Installation & Setup
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