nRF Connect SDK Projects

This repository contains a comprehensive collection of nRF Connect SDK demonstrations and learning projects, covering various aspects of Nordic Semiconductor nRF series development.

Overview

This workspace is organized into three main categories:

• demos1/: Basic Zephyr RTOS feature demonstrations
• demos2/: Advanced features and protocols

Project Structure

📁 demos1/ - Basic Zephyr Features

Project	Description	Key Features
button_controller/	Button input handling	GPIO input, interrupt handling
led_PWM/	PWM LED control	PWM API, LED brightness control
littlefs/	LittleFS file system	File operations, persistent storage
nvs/	Non-Volatile Storage	Key-value storage, configuration persistence
pwr_reg/	Power Regulator Control	Power management, regulator on/off with LED signaling

📁 demos2/ - Advanced Features

Project	Description	Key Features
cdc_acm_demo/	USB CDC ACM Communication	USB CDC, serial communication
deep_sleep_demo/	Deep Sleep Implementation	Power optimization, sleep modes
interrupts/	Interrupt Handling	GPIO interrupts, interrupt service routines
MCUboot/	MCUboot Bootloader	Secure bootloader, firmware updates
rtc_demo/	Real-Time Clock	RTC API, time keeping
settings_demo/	Settings Management	Configuration storage and retrieval
smp_server_demo/	SMP Server Protocol	Device management, remote configuration
state_demo/	State Machine	State management patterns
statistics_mng_demo/	Statistics Management	System monitoring, data collection
watchdog/	Watchdog Timer	System reliability, watchdog implementation

Prerequisites

• nRF Connect SDK: Latest version
• nRF Connect for Desktop: For device programming and debugging
• Hardware: nRF52840 Development Kit (or compatible nRF series board)
• VS Code: With nRF Connect extension pack

Getting Started

1. Setup Development Environment

   # Install nRF Connect SDK following Nordic's official guide
   # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/installation.html

2. Clone Repository

   git clone <repository-url>
   cd nrf_projects

3. Build a Project

   # Navigate to any project directory
   cd demos1/button_controller
   
   # Build the project
   west build -b nrf52840dk_nrf52840
   
   # Flash to device
   west flash

Configuration Files

Each project contains standard Zephyr configuration files:

• prj.conf: Main application configuration
• CMakeLists.txt: Build system configuration
• Kconfig: Custom configuration options (where applicable)
• boards/: Hardware-specific configurations
• *.overlay: Device tree overlays for hardware customization

Key Learning Topics

Basic Concepts

• ✅ GPIO Control (buttons, LEDs)
• ✅ PWM (Pulse Width Modulation)
• ✅ File Systems (LittleFS)
• ✅ Non-Volatile Storage (NVS)
• ✅ Power Management

Advanced Topics

• ✅ USB Communication (CDC ACM)
• ✅ Bluetooth Low Energy
• ✅ MCUboot Secure Bootloader
• ✅ Sleep Modes and Power Optimization
• ✅ Real-Time Clock
• ✅ System Management Protocol (SMP)
• ✅ Interrupt Handling
• ✅ Watchdog Timer
• ✅ State Machines
• ✅ Statistics Management

Hardware Requirements

Projects are designed for the nRF52840 Development Kit

Project Notes

Refer to notes.txt for detailed learning notes and project progression. Key insights include:

• Configuration file hierarchy and usage
• Hardware abstraction layer concepts
• Driver implementation patterns
• Power management strategies

Building and Flashing

Standard Build Process

# Build for nRF52840 DK
west build -b nrf52840dk_nrf52840

# Clean build
west build -b nrf52840dk_nrf52840 --pristine

# Flash to device
west flash

# Monitor serial output
west serial-term

Multi-Image Builds

Some projects (like MCUboot) require multi-image builds:

west build -b nrf52840dk_nrf52840 --sysbuild

Troubleshooting

Common Issues

1. Build Errors: Ensure nRF Connect SDK is properly installed and west is in PATH
2. Flash Errors: Check device connection and drivers
3. Configuration Issues: Verify board-specific overlay files

Useful Commands

# Check west installation
west --version

# List available boards
west boards

# Clean workspace
west clean

# Update dependencies
west update

Contributing

When adding new projects:

1. Follow the existing directory structure
2. Include proper configuration files
3. Add documentation for complex features
4. Test on target hardware

Resources

• nRF Connect SDK Documentation
• Zephyr RTOS Documentation
• Nordic DevZone
• nRF Connect for Desktop

License

This project is for educational and development purposes. Please refer to Nordic Semiconductor's licensing terms for commercial use.

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This repository represents hands-on learning with nRF Connect SDK, covering fundamental to advanced embedded systems concepts.