LED

Decentralized LED (Raspberry Pi)

This example shows how to turn a Raspberry Pi into a decentralized IoT LED device connected to the Ixian Platform via QuIXI.

The device securely integrates into Ixian, automatically accepts new users, and reacts to chat commands or MQTT messages in real time.

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🛠 Requirements

• Raspberry Pi 2+ with Raspberry Pi OS Lite
• Internet connection
• LED connected to GPIO pin 4
• .NET 8
• Mosquitto MQTT

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⚡ Installation

Run the following commands on your Pi:

# Update and install dependencies
sudo apt update
sudo apt install -y curl git jq mosquitto mosquitto-clients

# Install .NET 8
curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --channel 8.0 --version latest --verbose
echo 'export DOTNET_ROOT=$HOME/.dotnet' >> ~/.bashrc
echo 'export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools' >> ~/.bashrc
source ~/.bashrc

# Clone and build QuIXI + Ixian Core
git clone https://github.com/ixian-platform/Ixian-Core.git
git clone https://github.com/ixian-platform/QuIXI.git
dotnet build -c Release

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📂 Project Structure

/LED
 ├── start.sh              # Launches QuIXI and helper scripts
 ├── ixiAutoAccept.sh      # Automatically accepts incoming contacts
 ├── ixiMessageHandler.sh  # Handles chat commands (on/off/temp/help/wifi/contacts)
 ├── helpers.sh            # Helper functions for messaging & system control
 ├── ixian.cfg             # Example QuIXI configuration file
 ├── quixi.service         # systemd service file for auto-start

Note: quixi.service assumes start.sh and all helper scripts reside in /root/. Adjust paths if you move them elsewhere.

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▶️ Running the Example

Copy example ixian.cfg file to Release directory and edit if required

cp ixian.cfg QuIXI/QuIXI/bin/Release/net8.0/

Manual start

chmod +x start.sh ixiAutoAccept.sh ixiMessageHandler.sh helpers.sh
./start.sh

Auto-start on boot (systemd)

Copy the provided service file:

sudo cp quixi.service /etc/systemd/system/
sudo systemctl enable quixi
sudo systemctl start quixi

Check status:

systemctl status quixi

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🔑 Add Your Device as a Contact

Before you can send commands, add your Ixian address as a contact to QuIXI. Replace DEVICE_ADDRESS with the address of your Spixi client:

curl --get \
  --data-urlencode "address=DEVICE_ADDRESS" \
  "http://localhost:8001/addContact"

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💡 Supported Commands

Send commands via Ixian chat or through MQTT messages (Chat/# topic).

Command	Action
on	Turns the LED on
off	Turns the LED off
temp	Replies with Raspberry Pi CPU temperature
wifi	Manage Wi-Fi connections (add/remove/list)
contacts	Manage Ixian contacts (accept/add/remove/list)
help	Show available commands

Example message flow:

• Send "on" → LED turns on
• Send "temp" → Device replies with CPU temperature

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🔌 How It Works

1. start.sh launches QuIXI and the message handler.

2. ixiAutoAccept.sh listens on RequestAdd2/# and ensures the device accepts any new contact requests.

3. ixiMessageHandler.sh listens on Chat/#, parses incoming commands, and:

   • Controls GPIO pin 4 (LED on/off)
   • Executes helper functions (temp, wifi, contacts)
   • Replies via Ixian chat

This demonstrates how any IoT device can securely integrate into Ixian's decentralized, encrypted network.

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📜 License

This example is part of QuIXI and licensed under the MIT License.