This seven segment display module is specifically designed to work with POS systems and banking applications. Initially, this module is developed to work with PC based systems, and later it was modified to work with other platforms and applications.

To simplify the communication interface this unit emulates a COM port in the host terminal. Because of this feature, this module can work with many systems without having any additional device driver(s).

This display module is designed around STM32F103CB MCU. The firmware of this display unit operates with most of the STM32F103C series MCUs, which including STM32F103C8T6 based Blue Pill board.

This is certified open source hardware project. All the design files, documentation, firmware source code are available to download at the project source repository. All the content of this project are distributed under the terms of the following license:

• Hardware License: CC BY 4.0
• Software License: MIT
• Documentation License: CC BY 4.0