Motion Tracking Device Development

I need a small, wearable motion tracking device. The device should track motion using a combination of accelerometer and gyroscope.

Requirements:
- Connect to WiFi and send JSON data to a URL every 4 hours
- Store data for 30 days
- Discoverable via Bluetooth
- Battery life of at least 7 days

Deliverables:
- All components needed to assemble the device
- Source code for the application
- Detailed setup instructions

Ideal Skills and Experience:
- Experience with IoT device development
- Proficiency in motion sensors integration
- Familiarity with Bluetooth and WiFi connectivity
- Ability to write clear, detailed documentation