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Create: 2020-02-22 Update: 2024-04-30 04:46:28

ESP NOW: передача данных без WiFi

Между тем, ESP32 может передавать данные на частоте 2.4 Ггц на другое устройство без создания WiFi точки доступа. Хотя это и делается при помощи WiFi модуля, сам процесс напоминает "спаривание" компьютерной мыши со своим контрольным USB-устройством.

Для работы надо только знать MAC-адреса обоих устройств. На устройстве-приемнике достаточно прописать MAC-адрес передатчика и никаких дополнительных паролей не надо.
Конечно же, MAC-адреса можно "подсмотреть", если это устройство создаст точку доступа, поэтому это еще одна потенциальная дыра в безопасности, но я не об этом.

Главное то, что данный метод передачи данных очень энергоэффективен. За раз можно пересылать только 250 байт данных, реализовано что-то вроде контроля целостности, дальность при прямой видимости около 200 метров.

На видео пример того, как данные с тепловизора на базе ESP32 передаются на другое ESP32 с дисплеем. Скорость достойная.

Ко мне же наконец дошла пара новых устройств на базе ESP32-pico, из разряда "угадай, сколько телевизоров у меня в кулаке". Постараюсь к среде потестировать, насколько удобен данный протокол в работе.

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Telegram might soon let you protect your account by linking it to your email

Telegram is reportedly working on a new way to help users protect their accounts. The upcoming feature will let you link your account to an email ID, and Telegram will use it for verification every time you log in from a new device.Although Telegram has not shared any details officially, app developer and prolific reverse engineer Alessandro Paluzzi has managed to grab a few screenshots showcasing the in-development feature. As you can see in the attached tweets, the feature will give users the option to add an email ID “to protect your account.” The feature will also include a Sign in with Google option for Gmail users.

ESP NOW: передача данных без WiFi

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