What's the exclamation point icon on GPIO selection?

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mattmans
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What's the exclamation point icon on GPIO selection?

#1 Post by mattmans » 02 May 2019, 12:29

Hi guys

What's the exclamation point icon when selecting from the GPIO/1 Wire drop down menu when editing hardware? Pic attached to show what I mean. I can't find anything in the documentation.

Thanks

Matt
gpio symbol.PNG
gpio symbol.PNG (35.32 KiB) Viewed 760 times

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ThomasB
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Re: What's the exclamation point icon on GPIO selection?

#2 Post by ThomasB » 02 May 2019, 17:20

The triangles are traditional caution icons. In other words, you MUST know what you are doing if you use those pins because it might be a bad idea for your application. For example: GPIO-0, GPIO-2 and GPIO-15 are boot mode pins. GPIO-9 and GPIO10 are reserved for DIO flash memory use. And so on.

Before using these cautionary pins, I strongly recommend that you use google to see how to work around ESP8266's pin restrictions.

- Thomas

mattmans
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Re: What's the exclamation point icon on GPIO selection?

#3 Post by mattmans » 03 May 2019, 11:50

Aah, yes of course. Makes perfect sense now. Thanks!

Matt

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ThomasB
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Re: What's the exclamation point icon on GPIO selection?

#4 Post by ThomasB » 04 May 2019, 18:44

MODERATORS: DELETE ME PLEASE.
Last edited by ThomasB on 04 May 2019, 19:26, edited 3 times in total.

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grovkillen
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Re: What's the exclamation point icon on GPIO selection?

#5 Post by grovkillen » 04 May 2019, 19:18

ThomasB wrote:
04 May 2019, 18:44
what is that supposed to be? this certainly does not help with solving any problems discussed here.
The moderators removed the spam. Unfortunately your re-quote is helping the spammer, so please delete it.

- Thomas
I deleted the quote. Thanks Thomas!
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