This is a USB Serial Adaptor. Using jumper wires it can be used for Arduino programming (using RTS for reset) or similar boards. The board uses through-hole connections on both the micro-USB and 6-way 0.1" header socket for a more robust product over the surface mount alone. This module can only be used with systems using 5V, connecting to those using higher/lower voltages may result in damage. Click here for a 3.3V version. The IC used in the module enumerates as a Communication Device Class (CDC) device which modern (Win10/Linux/Mac OS X) operating systems have built-in drivers for. Pinout Pinout Description RTS Request to send RX Receive (connect to remote TX) TX Transmit (connect to remote RX) 5V 5V supply CTS Clear to send GND Ground Baud Rates The following baud rates are supported Baud rate Miss rate (%) 2,400 0.16 4,800 0.16 9,600 0.04 19,200 0.04 38,400 0.16 57,600 0.16 115,200 0.16 230,400 0.16 460,800 0.79 1,700,000 0.84 2,300,000 0.62 3,400,000 0.84 https://elecena.pl/product/22720837/usb-cdc-serial-adaptor-5v-discontinued 2023-03-07 https://elecena.pl/product/22720837/usb-cdc-serial-adaptor-5v-discontinued 2023-12-27 https://elecena.pl/product/22720837/usb-cdc-serial-adaptor-5v-discontinued 2024-09-19 https://elecena.pl/product/22720837/usb-cdc-serial-adaptor-5v-discontinued 2024-11-29 https://elecena.pl/product/22720837/usb-cdc-serial-adaptor-5v-discontinued 2024-11-30 https://elecena.pl/product/22720837/usb-cdc-serial-adaptor-5v-discontinued 2025-01-29