With this circuit you can log serial (UART) data to an USB thumb drive and record data over a long period without the need of a PC. Simply connect your system to the logger and plug in an USB keydrive. All incoming data is logged to a file on the memory stick.
- No smd components are needed.
- Firmware is open source.
- Single power supply voltage: 5V (about 80mA).
- Connection to your circuit with only three lines: +5V, GND, uC-Tx.
- UART baudrate can be adjusted with a configuration file on the USB keydrive.
USBStickLogger – Log serial data to an USB thumb drive - [Link]