How To: Pick the right pins on the NodeMCU ESP8266 and ESP32

The ESP32 Pins Outputting a PWM signal at startup that had duty cycles low enough that they didn't trigger the relay were: P14, P5, P0, P15, P8, P7, and P6.

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[jonjingleheimerschmidt]

"I troubleshooted my code."

"I troubleshot my code" is probably more accurate but it still a word I NEVER hear anyone use. I find both words to be so awkward that I usually say "I did some troubleshooting" or "after troobleshooting" which also have the advantage of being active voice.

Thanks for the video and for indulging me in the thoughts I think at 6 a.m. before drinking coffee. :)

[teddyruxpin]

I JUST SPENT 9 HOURS DEBUGGING MY CODE TRYING TO FIGURE OUT WHY MY NODEMCU WOULD NOT BOOT IF MY TOGGLE SWITCH WAS IN THE OFF POSITION. THANK YOU Mr.

[jonjingleheimerschmidt]

This video gets a "OMG, So helpful!" rating. Even as a visually impaired person I can actually read the chart clearly.

[NERDfirst]

Thank you so much for this! I was using a WeMos D1 and was considering doing the same as well because of the occasional unexpected behavior on certain pins. Your diagrams will come very much in handy!

[tackleit]

Thanks .. I was observing the same results when i used certain GPIOs with ESP8266 and concluded GPIO2 was the worst to work with relays .. Thanks again for all the hard work you put in figuring everything out .

[markmacherey]

I ran into the same issue while putting a D1 mini in one of my fish feeders, every time it rebooted it would fire and feed the fish... Vary frustrating, spent days trouble shooting.. Wasn't easy finding the answer. Thanks for the video this should help a lot of people.

[Gocast]

This is so handy. I've been thinking my bunch of 8266's could handle a lot of outputs, but now I realize I need a esp32.

[KP-ncgk]

Wow! This explains a lot why I am having weird behavior on my project. My lights suddenly blinking on and off for a short period. Now I know! Thanks!

[AzaBC]

Nice. Appreciate the clear concise info. Troubleshooting and figuring out ESP8266 pin usage caveats/quirks via trial and error at 1am without this info/insight wasn't fun. Cheers!

[dolarnote]

This video could've saved me an entire week around one month ago. But still I highly appreciate finding this video, very useful.

[williammiller]

Thank you!

The issue you mentioned of certain pins briefly going high was a huge problem for me in implementing a garage door opener. I did not realize it was only some pins so for a while I gave up. I got around the problem with high reliability using a Sonoff “inching module”. The description is found below. For a little over five bucks I believe this is a great solution. It has two modes, one of witch is momentary relay activation via an external button. It can relay messages via MQTT and integrates nicely with Home Assistant.
I got off subject a bit but again, a geat video.

Thanks!


Channel Inching /Self-Locking WiFi Wireless Switch 5V 12V
Model: IM160722001.

[Ustfu]

Excellent video...absolutely did not know that not all pins are created equal.

[caron]

This was exactly what I was looking for. Sadly there just isn't much documentation on this board. I appreciate the tedious testing you've done for us!!

[imranebrahim]

This is very informative and will be a great help to me as I get frustrated when I try to run a code and it does not work, I end up just giving up on the project.


Thanks

[bq]

Thank you, the effort / time, you put into this. Saved me a lot.

[JesusGamayon]

Thank you Rob, you saved me a lot of troubleshooting time! Looking forward for more of your videos!

[sameerk]

Hello from India.... Thank you very much for this easy to understand and very helpful video with valuable information.

[allersvp]

as my usual with you, i hit LIKE first THEN i watch the video.. my trusted remote friend :) .. i learned alot from u 4m scratch .. now i am doing great :) .. still learning from u as well.

[randycouch]

Thanks Rob. And thank you for all your time you put into helping us.

[whitefields]

I wish I had found you 6 hours ago Subscribed