Formatted output

Generating formatted output with sprintf(), snprintf() and dtostrf() is convenient and simple. I will explain the various options as well as the pitfalls.

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ESP-NOW Serial

ESP-NOW Serial is a new feature of the ESP32 board package from version 3.0.0, which is really easy to use. I will show you how to use ESP-NOW Serial.

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Character Arrays vs. Strings

Character arrays are less convenient than strings, but save resources. I show that character arrays are in no way inferior to strings in terms of functionality.

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