Explore the powerful ESP-NOW protocol for creating private peer-to-peer networks with ESP32 boards in this comprehensive 43-minute video tutorial. Learn how to set up a network without WiFi, transmit data in half-duplex or full-duplex modes, and implement encryption. Discover the capabilities of the 2.4GHz radio transceiver in ESP boards for sending small data packets between devices. Follow along with practical experiments, including a remote temperature sensor system that can be expanded to use multiple sensors. Gain insights into obtaining MAC addresses, initializing ESP-NOW, using broadcast mode, and implementing bidirectional communication. Access additional resources, including code samples and a dedicated forum, to further enhance your understanding of this versatile networking protocol for IoT projects.