ESPNowW

The ESPNowW is a ESPNow wrapper library designed for Arduino/Platformio

About

There are small differences between the ESPNow libraries for the esp8266 and esp32. This library unifies and simplifies the access in an arduino manner.

How to use

WiFi mode

You have to use a WiFi mode, otherwise the esp is likely to crash. Depending on your platform its either of the options below.

WiFi.mode(
#ifdef ESP8266
    WIFI_STA
#elif ESP32
    WIFI_MODE_STA
#endif
); // MUST NOT BE WIFI_MODE_NULL

NOTE: It can be any mode but WIFI_MODE_NULL.

init

Next is to init the ESPNow library. The examples from espressif always made a disconnect before, so just keep it to be safe. You can check the return value of ESPNow.init() to see if the init was successful and maybe retry with a delay if it wasn't.

WiFi.disconnect();
ESPNow.init();

NOTE: The return value of any function is zero (ESP_OK) if it is successful, check esp_err.h or esp_now.h.

set mac

This lib also includes a unified way to change the macaddress of the esp:

ESPNow.set_mac(uint8_t *new_mac);

Adding peers or callbacks should be self explanatory.

Contribution

If you feel like something should be changed feel free to submit a pullrequest.

License

This project is licensed under the "THE BEER-WARE LICENSE" (Revision 42). See the LICENSE.md file for details.