I recently got an ESP32 development board which will be replacing the Arduino Nano that we used for version 1. The idea is to control the clock from an smartphone app using the Bluetooth Low Energy (BLE) functionality of the ESP32.
For a first test I used the example code written by arduinofanboy to turn an LED on/off. I was also able to control the servo motor using the same app. The next step will be to write an app that can fully control the clock and will be replacing the IR remote that we used in the first version.