Secure transfer of information is a key feature of this device by utilizing AES encryption mechanism. Device keyboard allows entering predefined sum of money and transferring via secure BLE link.
Requirements:
- BLE interface for device configuration,
- OLED display for data presentation,
- Keyboard for device interaction,
- AES encryption.
Major components:
- nRF52832
- ER-OLED0.91-3B
- MCP73831
- TPS78230
Number of PCB layers: 4
BOM price: 25 USD
Realization time: 7 weeks
