Hello readers, I hope you all are doing great. In this tutorial, we will learn about the ESP-NOW protocol and how to communicate data between two ESP modules through ESP-NOW protocol and that is too without Wi-Fi connectivity. What is ESP-NOW Protocol? Fig. 1: ESP-NOW Protocol ESP–NOW is a connectionless communication protocol that is used for sharing small data packets between two ESP boards. This protocol is developed by Espressif. Features of ESP-NOW Protocol: It is a low-power wireless protocol, which makes two or more ESP devices communicate directly with each other without using Wi-Fi. ESP-NOW protocol does not require a handshake for establishing a connection but, they require pairing and once the devices are paired they can exchange data. ESP-NOW offers a persistent connection betw ...