adding README

README.md

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+# Solder Reflux Hotplate Project
+
+This repository contains the source code and design files for a Solder Reflux Hotplate, an essential tool for soldering SMD components. The project is built around the ATmega4809 microcontroller and includes a custom PCB design. It is programmed using PlatformIO, an advanced ecosystem for IoT development.
+
+## Features
+
+- Precise temperature control for soldering SMD components. with support of **up to 6 thermistors**.
+- Custom PCB design tailored for efficient heat distribution.
+- User-friendly interface for easy operation.
+- usb programming
+- wifi via esp32-12f (with wifi version).
+- PlatformIO integration for streamlined development.
+
+## Getting Started
+
+### Prerequisites
+
+- PlatformIO Core or PlatformIO IDE.
+- ATmega4809 microcontroller.
+- Basic soldering tools and electronic assembly skills.
+- Access to a PCB manufacturing service.
+
+### Hardware Setup
+
+1. **PCB Fabrication:** Fabricate the PCB using the provided design files.
+2. **Component Assembly:** Solder the components onto the PCB as per the schematic.
+3. **Power Supply Connection:** Connect a suitable power supply.
+
+### Preparing the ATmega4809
+
+Before programming the ATmega4809, it needs to be flashed with a default bootloader.
+
+1. **Bootloader Flashing:**
+   - U can use a spare arduino for the initial updi bootloader flash
+   
+
+2. **MicroUSB Programming:**
+   - After flashing the bootloader, the ATmega4809 can be programmed via the microUSB connection.
+   - Ensure the microUSB is connected to the appropriate pins on the ATmega4809.
+
+### Software Installation
+
+1. **Clone the Repository:**
+   ```bash
+   git clone https://github.com/yourusername/solder-reflux-hotplate.git
+   cd solder-reflux-hotplate
+2. **Import in vscode**
+
+
+### Usage
+
+Power On: Connect the hotplate to the power source.
+Set Temperature: Use the interface to set the desired temperature.
+Start Soldering: Place your PCB and components on the hotplate.
+
+### Customization
+
+Feel free to modify the firmware and PCB design to suit your specific needs.
+
+### Contributing
+Contributions are welcome. Please follow standard procedures for contributing to open-source projects.
+

platformio.ini

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-; PlatformIO Project Configuration File
+M; PlatformIO Project Configuration File
 ;
 ;   Build options: build flags, source filter
 ;   Upload options: custom upload port, speed and extra flags