Abstract
Espressif Systems developed ESP-NOW to enable ESP8266 and ESP32 microcontrollers to communicate without requiring a Wi-Fi connection. ESP-NOW operates at 2.4 GHz, the same frequency as Wi-Fi and Bluetooth, with microcontrollers paired prior to communication. A microcontroller transmits and receives messages to and from several microcontrollers, with a network consisting of 20 microcontrollers without message encryption, but 10 microcontrollers with encryption. If power to a microcontroller is lost and then restored, the microcontroller automatically reconnects to the paired microcontroller. In practice, a transmission range of 250 m over open ground was achieved with two ESP32 microcontrollers.
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© 2021 Neil Cameron
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Cameron, N. (2021). ESP-NOW and LoRa communication. In: Electronics Projects with the ESP8266 and ESP32. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-6336-5_14
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DOI: https://doi.org/10.1007/978-1-4842-6336-5_14
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Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4842-6335-8
Online ISBN: 978-1-4842-6336-5
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