I'm trying to understand what might be wrong here. I'm trying to hook up a push button to my ESP32 WROOM dev kit . When I test this my Arduino Uno R4 using pin 12, the serial monitor reads 1, until I press the button (connect a wire from gnd to pin 12) and then it shows 0. This is what I expect. Ho…

small update, D22 on the esp32 works. But not D4. Where can I go to find out why D4 doesn't work but D22 does?

[image] optikalefx: Where can I go to find out why D4 doesn't work but D22 does? https://docs.espressif.com/projects/esp-idf/en/stable/esp32/hw-reference/esp32/get-started-devkitc.html [image] optikalefx: Maybe the internal resistors on the ESP32 are too weak Seems to be the best expl…

[image] optikalefx: Where can I go to find out why D4 doesn't work but D22 does? D4 should work. I suspect a bad breadboard connection or a bad solder connection on the header pins. (You have the 30 pin version not the 36 pin) [image] ESP32 Pinout Reference - Last Minute Engineers …

[image] jim-p: D4 should work. I suspect a bad breadboard connection. (You have the 30 pin version not the 36 pin) Fair point!

In your other identical topic, you said everything was working as expected. What is going on? [image] ESP32 All but pin 2 INPUT_PULLUP are showing high General Electronics I'm trying to figure out which of the pins have an internal pull-up. What I'm reading online and wha…

My apologies for the multiple threads. Sometimes you just want to figure something out and you end up working too long. For reasons I can't explain, last night this wasn't working at all. And now this morning, all but D2 seem to be working. I suspect there is more going on here that I don't yet und…

[image] optikalefx: except for D2, I think why that does not work was explained in your other topic. Now you see why having identical topics is confusing to everybody

INPUT_PULLUP button not working?

Other Hardware General Electronics

jim-p September 17, 2024, 3:00pm 6

In your other identical topic, you said everything was working as expected.
What is going on?

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INPUT_PULLUP button not working?

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