NodeMCU wont boot with GPIO connected

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gregoinc
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NodeMCU wont boot with GPIO connected

#1 Post by gregoinc » 31 Jan 2019, 03:49

Hello,

I have a wierd issue and hope some of you can help me. I have done loads of reading in the forum prior to posting, but if this topic has been covered elsewhere then please me know.

I have a NodeMCU running this image: https://github.com/ToniA/ESPEasy/releases and everything seemed fine. Until I disconnected the power and reconnected... the NodeMCU would not start?

I have 2 items connected, 2 x DS18b20 sensors on GPIO-14 and an infrared LED connected to GPIO-0 via this circuit: https://www.letscontrolit.com/wiki/index.php/IRTX. The NodeMCU is powered via USB, but I have also trialled a stand alone 5v power supply with no change.

The only way to get the NodeMCU to start is when I disconnect the wires to the GPIO terminals. If I reboot via the web interface the NodeMCU keeps running. The problem only happens when initially applying the power.

I hope someone can give me some tips/help?

Thanks Mark

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grovkillen
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Re: NodeMCU wont boot with GPIO connected

#2 Post by grovkillen » 31 Jan 2019, 05:32

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gregoinc
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Re: NodeMCU wont boot with GPIO connected

#3 Post by gregoinc » 31 Jan 2019, 07:19

Hi grovkillen,

That was a huge help, thank you, much appreciated. Problem solved :)

Thanks, Mark

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