The schematic diagram below shows the electrical connections of the electronic components.

How does it work?

• We use voice commands to perform three functions: 1) controlling a bottle; 2) controlling a board; and 3) controlling a box.
• The voice commands are activated through Alexa Echo Dot, and they reach the ESP32-WROOM-32 board via WiFi.
• Finally, these voice commands are transmitted to the Arduino Nano 33 BLE Sense board, which controls the robot arm.