Module esp_wifi::esp_now

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ESP-NOW is a kind of connectionless Wi-Fi communication protocol that is defined by Espressif.

In ESP-NOW, application data is encapsulated in a vendor-specific action frame and then transmitted from one Wi-Fi device to another without connection. CTR with CBC-MAC Protocol(CCMP) is used to protect the action frame for security. ESP-NOW is widely used in smart light, remote controlling, sensor, etc.

For more information see https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/network/esp_now.html

Structs§

  • EspNow
    ESP-NOW is a kind of connectionless Wi-Fi communication protocol that is defined by Espressif. In ESP-NOW, application data is encapsulated in a vendor-specific action frame and then transmitted from one Wi-Fi device to another without connection. CTR with CBC-MAC Protocol(CCMP) is used to protect the action frame for security. ESP-NOW is widely used in smart light, remote controlling, sensor, etc.
  • EspNowManager
    Manages the EspNow instance lifecycle while ensuring it remains active.
  • EspNowReceiver
    This is the receiver part of ESP-NOW. You can get this receiver by splitting an EspNow instance.
  • EspNowSender
    This is the sender part of ESP-NOW. You can get this sender by splitting a EspNow instance.
  • EspNowWithWifiCreateToken
    A token used to create an EspNow instance while Wi-Fi is enabled.
  • PeerCount
    Holds the count of peers in an ESP-NOW communication context.
  • PeerInfo
    ESP-NOW peer information parameters.
  • ReceiveInfo
    Information about a received packet.
  • ReceivedData
    Stores information about the received data, including the packet content and associated information.
  • SendFuture
    A future representing the result of an asynchronous ESP-NOW send operation.
  • SendWaiter
    This struct is returned by a sync esp now send. Invoking wait method of this struct will block current task until the callback function of esp now send is called and return the status of previous sending.

Enums§

  • Error
    Internal errors that can occur with ESP-NOW.
  • EspNowError
    Common errors that can occur while using ESP-NOW driver.
  • WifiPhyRate
    ESP-NOW rate of specified interface.

Constants§

Functions§