Development of Be-Braille Learning Tool: Enhancing Braille Education and Interaction for Visually Impaired Students

As technology advances in Indonesia, the view emerges that visually impaired children can simply utilize adaptive technology available in the market. This is because not everyone can be facilitated by adaptive technology. Another challenge in teaching reading and writing to visually impaired children is the limited number of teachers in special schools who understand Braille, as well as the limited availability of tools such as reglet and stylus. There is one electronic device used by visually impaired individuals to read text in Braille, namely the Refreshable Braille display consisting of 24 cells priced at 3600 euros or approximately equivalent to 53 million Indonesian Rupiah. Therefore, a low-cost portable Braille device that can be owned by every special school is needed. This research utilizes the ESP32 microcontroller to control a 5V relay in order to move the Braille keys. When the inductance in the relay changes, the frequency also changes, converting it into voltage to control the up and down movement of the Braille keys according to the data sent. Input in the form of letters or numbers is transmitted to a smartphone as a human-machine interface using Bluetooth.