ESP-NOW wireless communication protocol

[Andreas]

About

ESP-NOW is a kind of connectionless Wi-Fi communication protocol that is defined by Espressif. Different from traditional Wi-Fi protocols, the first five upper layers in OSI are simplified to one layer in ESP-NOW, so the data does not need to go through the physical layer, data link layer, network layer, transport layer in turn, which reduces the delay caused by packet loss under congested network, and leads to quickly response time.

ESP-NOW is yet another protocol developed by Espressif, which enables multiple devices to communicate with one another without using Wi-Fi. The protocol is similar to the low-power 2.4GHz wireless connectivity that is often deployed in wireless mouses. So, the pairing between devices is needed prior to their communication. After the pairing is done, the connection is secure and peer-to-peer, with no handshake being required.

References

• Overview
  ESP-Now Overview | Espressif Systems

• Demonstration video
  ESP NOW: Espressif's Wireless-Communication Protocol - YouTube

• User guide
  https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf

• API reference
  ESP-NOW - ESP32 - — ESP-IDF Programming Guide latest documentation

• Repository
  GitHub - espressif/esp-now: A connectionless Wi-Fi communication protocol

• Arduino support
  GitHub - yoursunny/WifiEspNow: ESP-NOW Arduino library for ESP8266 and ESP32

[weef]

@Andreas

ESP-NOW is yet another protocol developed by Espressif,

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