RS232 to TTL / female serial port to TTL / serial module / brush board MAX3232 chip   use: This product is widely used in radio modification, mobile phone brushing, XBOX360 brushing machine, GPS, car detection, DVD brushing, hard disk repair, set-top box upgrade.   Can be used to program the type of microcontroller: STC microcontroller STM32 microcontroller microcontroller MCU microcontroller   Communication chip: domestic MAX3232   Working voltage: 3.3V-5.5V   Interface: TX RX VCC GND