This is a MAX3232-based level shifter for converting a serial TTL level to a serial standard RS-232. This allows a microcontroller to communicate Works with both 5 V and 3.3 V. The unit is supplied fully assembled and tested as shown. 4-pin pin header includes 0 V, current and RX, TX connections. In addition, there is a mini-USB socket that can be used to power the device. Baud rate: Up to 150 kbps - works at both 5 V and 3.3 V. https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2021-05-26 https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2021-06-19 https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2022-11-17 https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2023-04-20 https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2024-03-19 https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2024-08-12 https://elecena.pl/product/18578450/me030-developer-boards-rs232-to-ttl-max3232 2026-03-03