Prepaid Electric Meter Coding

I'm seeking a skilled developer to code functionality for a prepaid electricity meter. The meter should support balance tracking, remote top-up, and usage history logging, with Bluetooth as the communication method.

Essential Requirements:
- Balance tracking and display
- Remote top-up capability
- Usage history logging
- Bluetooth communication

Ideal Skills and Experience:
- Background in hardware coding, especially for prepaid meters
- Experience with Bluetooth communication protocols
- Strong problem-solving skills and attention to detail
- Prior experience in similar projects would be a plus

Looking for a candidate who can deliver a robust and user-friendly solution. Please provide samples of previous work if available.