![]() A duration can be specified, otherwise the wave continues until a call to. ![]() Under the hood, both implementations are calling ledcWriteTone. Generates a square wave of the specified frequency (and 50 duty cycle) on a pin. Similar to Arduino’s tone(), each signal is produced at 50% duty cycle. You want to specify the frequency and duration of the tone. ![]() Or just copy the code below and paste it in the IDE. The tone will only stream once you can run it again by hitting the reset button. Only the source code for Arduino UNO is quoted. The code for a test melody can be found in the Arduino IDE under examples > digital > tone melody. The tradeoff here is that this is not cross-compatible with an Arduino, however, it means not having to import an external library or having to define note frequencies yourself. Tones Problem You want to produce audio tones through a speaker or other audio transducer. The tone() is defined in hardware/arduino/avr/cores/arduino/Tone.cpp as below.
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