With the arrival of infrared sensors, it was necessary to build a PCB to connect them to the Arduino and a holder to fix them on the top of the robot. An ADC converter was required to have more analog inputs on the Arduino. For this we bought the ADS1015 which has 4 analog inputs that will be used for the 4 sensors and that connects to the Arduino through I2C. The PCB was also used for ADS1015 and ESP-01. The sensors support was made of nylon being a parallelepiped of dimensions (14mm * 14mm * 60mm) that will accent on the top of the PCB.
I have advanced some functions of the learning code so that I can start testing when the robot is fully ready.