... for integrating into existing devices 2. Multi-interface: RS232, RS485, USB, TTL, SPI, C&D ... for enhanced security, expandable on request3. Multi-interface: RS232, RS485, USB 2.0, TTL, SPI, Clock ... DevelopmentCNReader SDK is software development kit worked with CN3XX and CN6XX product series for ... cards (7) Testing tags (8) RS232-RS485 converter module Mini RF module with RS232, RS485, USB, TTL, SPI, ...