MAATS - Material Accelerated Aging Test System

MAATS (Material Accelerated Aging Test System) is a control and monitoring system designed for material accelerated aging tests. It maintains a controlled environment with specific CO2 concentration and humidity for material sample reactions.

🚀 Key Features

• Precise Environment Control: PID-based closed-loop control for CO2 concentration and humidity.
• Real-time Data Acquisition: Supports S8-005 (CO2) via UART and AHT10 (Temp/Humid) via I2C.
• Industrial Communication: 4G MQTT for remote cloud monitoring and RS485 (Modbus RTU) for dehumidifier control.
• Robust Storage: Local data logging to TF card in CSV format.
• Local Interaction: 5-inch TFT display for status visualization and keypad for local control.
• Cloud Integration: Real-time dashboard and history query via Web client.

🏗 System Architecture

Hardware Components

• MCU: GigaDevice GD32F470Z (ARM Cortex-M4F @ 240MHz)
• Sensors:
  • CO2: Sensirion S8-005 (UART)
  • Temp/Humid: AHT10 / SHT40 (I2C)
• Actuators:
  • CO2 Valve: GPIO
  • Humidifier: GPIO
  • Dehumidifier: RS485 (Modbus RTU)
• Connectivity: 4G LTE Module (MQTT)
• Storage: MicroSD Card (FAT32)
• Display: 5" TFT RGB LCD

Software Tasks (FreeRTOS)

Task Name	Priority	Cycle	Responsibility
SensorTask	3	1s	Acquire CO2, Temperature, and Humidity
ActuatorTask	2	500ms	Control valves and RS485 devices
ControlTask	1	200ms	Run PID algorithms for CO2 and Humidity
CommTask	2	5s	Sync data with cloud via MQTT
StorageTask	4	60s	Log data to CSV on TF card
DisplayTask	5	1s	Refresh local UI
KeyScanTask	5	100ms	Handle user input

🛠 Build & Environment

Prerequisites

• Toolchain: arm-none-eabi-gcc (Tested with 14.2.1)
• Build System: CMake 3.10+ & Make
• SDK: GD32F4xx Firmware Library

Compilation

mkdir build
cd build
cmake -DCMAKE_TOOLCHAIN_FILE=../toolchain.cmake ..
make -j$(nproc)

Flashing

Using OpenOCD:

openocd -f interface/stlink.cfg -f target/gd32f4x.cfg -c "program build/MAATS_ColletAgent.elf verify reset exit"

📂 Project Structure

.
├── CMakeLists.txt      # Build configuration
├── main.c              # Application entry and FreeRTOS tasks
├── docs/               # SRS, Test Plans, and Design Documents
├── toolchain.cmake     # Cross-compilation settings
└── gd32f4xx_it.c       # Interrupt Service Routines

📜 License

Internal Project - Copyright (c) 2026 raintiliang.