WifiEspNow is an Arduino library for ESP-NOW, a connectionless WiFi communication protocol defined by Espressif. Refer to ESP-NOW reference for more information about how ESP-NOW works and its limitations.

WifiEspNow is a simple wrapper of ESP-NOW functions in ESP-IDF. On ESP8266, it supports unicast only. On ESP32, it supports both unicast and multicast.

WifiEspNowBroadcast implements pseudo broadcast over ESP-NOW. Each device advertises a specific WiFi SSID, and discovers each other through BSSID scanning. Then, messages are transmitted separately toward every peer via ESP-NOW unicast. This is my custom protocol, which differs from WifiEspNow multicast.