Hissing Noise from Loudspeaker
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When I start/reset my M5Stack Fire I get an audible hissing noise. This is not the case with my M5Stack basic unit.
It's loud enough to be annoying. Is this a fault, or a feature?
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I purchased this only a few days ago here in germany from your Partner firm Conrad, (under their own Maker Factory brand). The serial number sticker has faded badly in the 4 days since I bought it (bizzare!), but the number 0441 is still readable, if this is of any help in tracing the fault.
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Try to remove battery bottom and turn it on with usb power supply only (:
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Due to hardware flaws, sometimes when interfacing with some of the units there is an audible hiss. Unfortunately since it is a hardware flaw the only solution is to use code to reduce the volume of the hiss.
in Arduino it should be something like
dacWrite(25,0)Python
dac0 = machine.DAC(25)
dac0.write(0)
