OVJ RS232-TTL single-chip conversion board programmer, with four 20cm line, a USB power cord

Description

1. General equipment serial communication2. Router or ADSL firmware upgrade3.GPS serial communication4. hard disk firmware upgrade5. MCU communication, RX received MCU TX; TX received MCU RX; GND connected to the ground, no need to use MAX232 conversion6. Hyper-terminal use, commonly used serial debugging tools7. Various satellite receiver upgrade8. Electronic enthusiasts use