The project represents an intelligent and independent system for controlling the cooling and lighting (ARGB) inside a PC case. It is based on a two-node architecture that communicates wirelessly via Wi-Fi protocol, eliminating the need for long cables and bloatware software installed on the operating system.

The system is divided into two main units working together:

It is the heart of the system, implemented on a T-HMI (ESP32-S3) module with an integrated LCD display.

• DHT22 Sensor: Constantly reads the case temperature.
• ARGB Control: Manages the colors and modes of the Thermalright fan.
• Real-time Display: Projects the RPM, temperature, and current mode on the screen.

Built on an ATmega328P Xplained Mini board connected to an ESP-01S module.

• Features an expansion board with 5 buttons.
• Allows changing operating modes and speed remotely.
• Externally powered for total portability.

• Auto Mode (Default):
  • The system automatically adjusts the fan speed using a temperature curve.
  • For every 5°C threshold reached, the fan speed progressively increases or decreases to maintain the balance between cooling and noise.
• Manual Mode:
  • The user takes full control via the remote.
  • Dedicated buttons can be used to increase or decrease the speed regardless of the read temperature.

The primary purpose is to provide a user-friendly hardware interface that allows users to easily monitor and control fan speeds and ARGB lighting. While connecting a fan directly to the motherboard provides basic cooling, this project focuses on delivering accessible, real-time control without relying on proprietary software. It essentially protects the user from the risk of losing manufacturer support (abandonware), or turning into resource-heavy bloatware over time.

The idea stemmed from the frustration caused by software dependency and forced firmware updates of commercial products, which often break functionality or add unnecessary background processes. I wanted a hardware-level “Plug & Play” device that guarantees longevity and provides clear information on a physical display, completely independent of the PC's software ecosystem.

• For me: It gives me precise, physical control and immediate visual monitoring over my PC's thermal state and aesthetics without tabbing out of applications or games.
• For others: The same as above, but also Future-Proof & No Obsolescence: Since it doesn't require a dedicated app, it will never lose functionality due to lack of software support from a manufacturer.
  • OS Independence: Works on Windows, Linux, or macOS seamlessly, without requiring any drivers.
  • Zero Resource Consumption: Does not load the PC's processor or RAM (crucial for gamers or heavy-duty tasks).
  • Customization: While the interface is simple, it ofers all the customization a normal user needs.

• Microcontrollers: ESP32-S3 (Central unit) and ATmega328P Xplained Mini (Remote).
• Remote Communication: ESP8266 ESP-01S Wi-Fi module.
• Sensor: AM2302 (DHT22) for temperature and humidity.
• Actuator: Thermalright C12CW-S ARGB Fan.
• Interface: LCD Display (integrated on T-HMI) and a 5-button module.
• Power Management:
  • Remote: External battery and an AMS1117-3.3V voltage regulator (to step down voltage for the Wi-Fi module).
  • Controller: Laptop USB-C connection (5V for the ESP32 logic and ARGB LEDs), a 12V 1A Wall Adapter, and a DC Screw Terminal (for the fan motor).

The Remote Node utilizes an ATmega328P microcontroller communicating with an ESP8266 (ESP-201 breakout format) Wi-Fi module. Voltage regulation from 5V to 3.3V is handled by an AMS1117-3.3V linear regulator.

The Controller Node is based on the WiFi LoRa 32 V2 Module. It interfaces with an Addressable RGB LED (ARGB) strip, a DHT22 environment sensor, and a 4-pin PWM fan powered by an external 12V accumulator.

DHT22 Sensor

ARGB 3-PIN Connector

4-PIN PWM Fan Header

External Power (Accumulator)

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