In conversation with the Jewelry designer, it was agreed on working with two accelerometers. One for each hand. She liked the LED as it was an inspiration to her design. It was decided that two RGB LEDs will be used in the piece. The use of the serial port was discarded as the ideal was for the piece to be worn by a dancer. WiFi transmission was decided. 

It was also decided to include optical fiber to add more impact to the use of light. The piece, on her review, went through different changes, from including the cable communicating the accelerometers and LEDs on the hands, to the board, to conceal it from view so that only the piece, and the sound generated, caught the attention of the spectator.

These changes were a challenge. The board had to be changed from an Arduino UNO to a WeMos D1 R2 (suggestion from a help request on Arduino Forum). It includes two I2C addresses, needed to read the two accelerometers, and an integrated WiFi module, saving both time and money.

A PCB design was implemented as the accelerometer and LED (with their resistors and cable connections) had to fit in an small space. Communication went back and forth to properly design and 3D print the hand pieces.