Controlling Buzzer sound

[2019peb5400]

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How to control buzzer frequency

Frequency and voice(amplitude) are completely different. You can use PWM to control the frequency of the buzzer. For this you may use analogWrite(pin,value) where value is in the range 0-255. Bolt cannot provide true analog signals to handle the amplitude and so you may have to interface a DAC(Digital to Analog Converter) with bolt, if you require to do so.