Our ESP32 board is connected to the ESP32 board through the UART interface. The UART interface has an Rx receiver and a Tx transmitter. Technically, we can map some ESP32 GPIOs to become UART pins. In this demo, we will perform the following wiring:

• The GPS Rx pin is connected to ESP32 IOIO 22
• The GPS Tx pin is connected to ESP32 IOIO 23
• The GPS GND pin is connected to ESP32 GND
• The GPS VCC pin is connected to ESP32 3.3V

Other GPS pins are connected to the GND pin from the ESP32 board. We only use Rx and Tx from the GPS module. You can see my hardware wiring in Figure 7.4: