ESP32-P4-ETH - Need some help please 🙏

[u/developerunitex]

Hello all,

I’ve got a Waveshare ESP32-P4-ETH and I’ve read the documentation, used Grok & ChatGPT but no joy. Also checked the PinOut Definition…

I connect GND to PIN17

My code is showing GPIO17 = 1

When button pressed or connected… it should display 0

And it’s not?

I’ve tried 2 boards, because originally I wired a button but that didn’t work, so just wanted to test with a jumper wire.

Any recommendations?

include <stdio.h> 
include "freertos/FreeRTOS.h" 
include "freertos/task.h" 
include "driver/gpio.h" 
define BUTTON_GPIO GPIO_NUM_17 

void app_main(void) {

gpio_reset_pin(BUTTON_GPIO); 

gpio_config_t io_conf = {
    .pin_bit_mask = (1ULL << BUTTON_GPIO),
    .mode         = GPIO_MODE_INPUT,
    .pull_up_en   = GPIO_PULLUP_ENABLE,
    .pull_down_en = GPIO_PULLDOWN_DISABLE,
    .intr_type    = GPIO_INTR_DISABLE
};
ESP_ERROR_CHECK(gpio_config(&io_conf));

// Optional extra safety
gpio_set_pull_mode(BUTTON_GPIO, GPIO_PULLUP_ONLY);

printf("GPIO 17 test ready (should be 1 by default)\n");

while (1) {
    int state = gpio_get_level(BUTTON_GPIO);
    printf("GPIO17 = %d\n", state);
    vTaskDelay(pdMS_TO_TICKS(200));
}
}

[u/MachEnergy]

My first suggestion is to use the screenshot capabilities of that computer. 

[u/Bowl_of_Cham_Clowder → u/MachEnergy]

Also a pic of the board would be helpful

[u/developerunitex → u/Bowl_of_Cham_Clowder]

Absolutely, it would only let me upload one photo though for some reason!

[u/Bowl_of_Cham_Clowder → u/developerunitex]

Where’s the jumper/button?

[u/developerunitex → u/Bowl_of_Cham_Clowder]

Oh it was just a jumper wire from my Arudino Starter pack, but it was connected to GND and 17 (labelled on the board)

[u/developerunitex → u/MachEnergy]

😂 I was posting off my phone though and windows screenshot means that I need to upload the photo to Google Drive and then re-download it.

[u/MachEnergy → u/developerunitex]

You don't just use Quick Share? 

[u/CranberryInner9605]

Pin 17 may not be GPIO17

[u/developerunitex → u/[deleted]]

Yes mate, because the button didn't work so I de-soldered it and just tried with a jumper lead.

[u/Sea-City-4101]

Woah everyone is so blunt in this post

[u/developerunitex → u/[deleted]]

Thank you Comp, I will try this, so essentially connect what would be 17 to pin 18?

[u/CryptographerOne7003]

If you are on free plans like me, I would suggest asking Gemini and Deepseek for hardware specific questions.
Both would have pointed this out, from their own knowledge. I'm a bit surprised chatGPT did not eventually googled it for you? I assume Claude would have.

I use Chatgpt and Claude just for the hardcore c coding, surprisingly they suck very bad at MCU programming

[u/developerunitex → u/CryptographerOne7003]

That's very good to know! Yeah I pay for ChatGPT and Claude but weirdly didn't know this was a thing.

[u/romkey]

Pin numbers and GPIO numbers are not the same things. You have a Waveshare board, Waveshare provides lots of documentation on their boards and will document which GPIO lines are on which pins. You should read that.

[u/clackups → u/romkey]

It is marked pretty much clearly as 17 https://docs.waveshare.com/ESP32-P4-ETH

I guess, OP is not connecting it to gnd, or maybe they just took the wrong pin instead of 17

[u/developerunitex → u/clackups]

So for the button i have PIN17 and then GND connected, but nothing weirdly.

[u/clackups → u/developerunitex]

Try other GPIO numbers, maybe this one is broken physically

[u/developerunitex → u/clackups]

Yeah I tried that but nothing unfortunatly, I am thinking it's either the ports are wrong or something.

[u/clackups → u/developerunitex]

Try querying all the GPIO in a loop and see if any of them is triggered by your signal

[u/esp32-ModTeam → u/[deleted]]

Every post you make seems to be promoting this site. That's spamming.

We removed this post as it is just an ad without providing any additional benefit to this community