🔭 Ardufocus BT – Wireless Telescope Focuser

Turn your Ardufocus into a fully wireless focuser system

Bluetooth-enabled fork of Ardufocus designed for portable astrophotography setups.

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🚀 Why this fork?

Classic Ardufocus requires a USB cable.

This version adds:

• 📡 Wireless control via Bluetooth
• 📱 Smartphone interface
• 🧳 Cleaner field setup (no cables hanging from the telescope)

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✨ Features

• Bluetooth serial communication (JDY-31 / HC-05 / HC-06)
• Compatible with ASCOM / Moonlite (via hardware UART)
• Real-time telemetry
• Step-based precision control
• Mobile-friendly interface

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📸 Demo

Focus Control	Telemetry & Debug	Bluetooth Connection

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🔧 Hardware Setup

🧩 Default Configuration

• Arduino UNO
• 28BYJ-48 stepper motor
• ULN2003 driver
• JDY-31 / JDY-34 / HC-05 / HC-06 Bluetooth module
• PlatformIO (Arduino framework)

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🔌 Pinout

Arduino Pin	Function
D0 / D1	Hardware Serial (ASCOM / Moonlite)
D2	Bluetooth RX (from module TX)
D3	Bluetooth TX (to module RX)
D8	ULN2003 IN1
D9	ULN2003 IN2
D10	ULN2003 IN3
D11	ULN2003 IN4

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⚡ Wiring

Stepper + Driver

UNO 5V -> ULN2003 VCC
UNO GND -> ULN2003 GND

UNO D8 -> ULN2003 IN1
UNO D9 -> ULN2003 IN2
UNO D10 -> ULN2003 IN3
UNO D11 -> ULN2003 IN4

28BYJ-48-> ULN2003 connector

Bluetooth Module

UNO GND -> BT GND
UNO D2 <- BT TXD
UNO D3 -> BT RXD

⚠️ Some modules are NOT 5V tolerant → use 3.3V or level shifting if needed.

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📡 Bluetooth Configuration

• Backend: SoftwareSerial
• Baud rate: 9600
• RX pin: D2
• TX pin: D3

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🧱 Case

3D printable enclosure:

https://www.thingiverse.com/thing:5140868

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🤝 Credits

Based on original Ardufocus project.

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📢 Feedback

Suggestions, issues and improvements are welcome!