Battery Power and UART0

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DerLexus
Posts: 22
Joined: 03 Sep 2017 14:38

Battery Power and UART0

Post by DerLexus »

Hi,

If i power using a 3,3v battery the Serial0 prints only garbadge. If i using USB Power the same Sketch works perfectly and i see the UART0 output. Do this have todo with the 3.3v power?

Bye
Nino

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PoltoS
Posts: 5831
Joined: 26 Jan 2011 19:36

Re: Battery Power and UART0

Post by PoltoS »

This might be related with the know hardware issue if Z-Wave chips - it changes MCU speed when connected to USB cable. Try a cable without data wires.

DerLexus
Posts: 22
Joined: 03 Sep 2017 14:38

Re: Battery Power and UART0

Post by DerLexus »

Thanks for your reply.

You mean i should try a power only usb cable? But if i use usb everything is fine... problem starts if i use a battery and no usb at all.

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PoltoS
Posts: 5831
Joined: 26 Jan 2011 19:36

Re: Battery Power and UART0

Post by PoltoS »

Make sure the UART speed matches

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