Bluepill-serial-monster is a STM32 Blue Pill board that turns it into triple USB-to-Serial adapters.
The board implements a USB 2.0 full-speed composite device that consists of 3 USB CDC devices.
STM32 Blue Pill is a ridiculously cheap STM32 development board which is available in many stores around the globe. The board contains decent hardware that supports USB 2.0 Full-Speed, has 3 independent...
#CH340G Full UART TTL Converter v1.0 #
* Full UART-signals routed and output to PINs
* Level logic selector (jumper) (5v or 3v3).
* 5V and 3v3 are always output to contacts, regardless of the selected levels
* Transmit and receive LED indicators