Conflict in Boot modes GPIO2

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Re: Conflict in Boot modes GPIO2

By cal
- Fri Jun 26, 2015 1:28 am #21722 Moin tytower,

please accept that you are wrong with this. There is a difference between floating and connecting.
There is a difference between "don't care" (X) and "floating".
You are trying to help a lot of people but here you are indeed misleading.
A floating pin especially with some trace and possibly even a connector works like an antenna.
Using pull-ups/pul-downs help to work against catching a signal from the environment.
Take an oszilloscope to get an impression what difference a resistor makes.
Or build a darlington based detector to amplify the antenna effect to some led lighting.
If your hand is just getting nearer/away from the antenna you see a difference.

Please don't mislead people. Works for me is no replacement for application notes and rules.
I have been corrected recently here on an issue I believed I know and I based my tipps on.
I was wrong because the espduino guy did a clever adaption of the arduino stuff to espduino.
There is a lot to learn outside and the internet provided great new way of doing things.
But it does not change the rules of physics.
It frightens me if I see people just starting with electronis "designing" PCB layouts that are connected to the
house mains current without proper fusing, distances, etc. Or switching machines on and off using
an esp8266 with just an relais and no hardware/software protection schemes.
People will die because of this.

Cal
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Re: Conflict in Boot modes GPIO2

By tytower
- Fri Jun 26, 2015 3:23 am #21731 Seems a few people have barrows to push around the place Cal . As a full call ,ham radio operator in Australia the study and knowledge of radio and electronics required is extensive . I fancy myself as a bit of a Yagi specialist . I understand antennas. Normally I would not reference that fact but your speech necessitates it . look me up . So as they say don't tell me about boats.Hi Hi

I'm a bit disapointed with your speech though. Its a bit like trying to kick a man when he's down and thats not acceptable conduct here in Australia and in many parts of the world still. Things like that are never forgotten .

Now on the technical side, not connecting the pin as per the connection diagram not only works for me, but for many many others I gather .Look around . You can take it high if you feel that is safer but it is incorrect to say I am misleading anybody by telling them to leave it unconnected. At no point have I said its a "don't care " thats just been made up and shoved in for effect . Don't care is entirely different

I've also said that I am going to make many mistakes in posts. That's the nature of the device we bought to play with and the learning forum we joined . I hope you might see the merit in my post.
Last edited by tytower on Mon Jun 29, 2015 11:48 pm, edited 1 time in total.
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Re: Conflict in Boot modes GPIO2

By cal
- Fri Jun 26, 2015 4:21 am #21737 Sorry if you felt it this way.
I don't want to push someone who is down.
There is a lot of confusion, wrong assumptions, wild guessing etc. going on here and you can only judge
people by their words.
I am not a native speaker and that makes it even more difficult.
I tried to choose my words carefully but obviously failed.
Flippy australians, boringly serious germans, grumbling russians. It's a colourful mix.
Let's try to calm down and try to make clear what are facts, assumptions, works for me, etc.

Let's have fun,
Cal
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