An introduction to Wi-Fi with the ESP32

The M5Stack Core ESP32 microcontroller’s Wi-Fi system architecture consists of two subsystems: Wi-Fi media access control (MAC) and the baseband. The Wi-Fi MAC address is a unique identifier that is assigned to a network interface controller (NIC). The NIC allows us to address the network used in the Wi-Fi-based communication system. The MAC address for the M5Stack Core controller is shown in Figure 8.1:

Figure 8.1 – The M5Stack Core MAC address

The Wi-Fi baseband in a communication system is the modulating signal or intelligence sent through a single channel. The intelligence or digital data stream is sent through as the information through a single channel media. Wi-Fi baseband communication uses bidirectional communication transmitted through the single channel media to send and receive digital data. Figure 8.2 illustrates the ESP32 communication system block diagram.

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