Project Details
Our clients operate off-grid solar utilities in South Africa. They use a prepaid meter/charge controller to
manage their customer's payment. We undertook this design process for them. This included handling of secure credit tokens
based on IEC 62055-41. Credit is entered through a keypad. In addition the meter has GPRS functionality allowing
the utility to remotely monitor the customer's usage.
The main technologies used here included:
- C++ (MikroC)
- PIC Development
- UART Integration
- Bluetooth
- GSM