Comments on: ESP32-CAM AI-Thinker Pinout Guide: GPIOs Usage Explained

By: Chris

Chris — Wed, 09 Jul 2025 03:05:51 +0000

p.s. you might need to pull the firmware-programming pin manually – not all serial programmers do that for you.

By: Chris

Chris — Wed, 09 Jul 2025 03:04:11 +0000

This might help:
chrisdrake.com/cfb/ (it’s old – but worked on hundreds of boards in the past)
(or perhaps this: chrisdrake.com/esp32cam/ )

By: Sara Santos

Sara Santos — Mon, 07 Jul 2025 09:32:09 +0000

In reply to Jens.

Hi.
Do you get that message over and over again? Multiple times in the Serial Monitor?
Which tutorial were you following?
Regards,
Sara

By: Jens

Jens — Sun, 06 Jul 2025 20:28:35 +0000

I’m still getting this error when starting up.

I managed to get the camera working before without any problems. Later on, I tried to connect my BME280 sensor to the board at the same time. That didn’t really work, and since then, the camera won’t connect properly anymore.

The strange thing is that after testing with the BME280, the camera actually worked again once. But now, no matter what I try, I only get the reset log in the serial monitor.

Can anyone help me out? I’m quite new to this and a bit stuck at this point.

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4888
load:0x40078000,len:16516
load:0x40080400,len:4
load:0x40080404,len:3476
entry 0x400805b4

By: Daniel Samuel

Daniel Samuel — Tue, 04 Mar 2025 17:14:55 +0000

In reply to nour. Asking again. Did anyone find a solution for working mpu6050 and the cam at the same time?

By: Eoin Abastar

Eoin Abastar — Tue, 11 Feb 2025 12:36:53 +0000

In reply to Graham Johnston. Thank you for the clarification.

By: yorrrick

yorrrick — Sun, 09 Feb 2025 13:55:34 +0000

If you’re using the MicroSD card in SDMMC mode then you can’t use GPIO 2, 4, 12 and 13 but also not GPIO14 and 15 which are the CLK and CMD lines for SDMMC.
If you use the SD card in SPI mode then you can use GPIO 12 and GPIO 4 for other stuff but 13, 14, 15 and 2 are still used for CS, CLK, MOSI and MISO. SPI mode is slower than SDMMC but if you’re only writing text files you won’t notice the difference.

By: Graham Johnston

Graham Johnston — Sun, 09 Feb 2025 10:33:21 +0000

It doesn’t really matter what you are writing to the SD card, those pins should not be used for any other purpose if you are using the SD port.

By: Eoin Abastar

Eoin Abastar — Thu, 06 Feb 2025 13:35:29 +0000

Hello, I’d like to clarify a certain aspect of the ESP32-CAM. When the microSD card slot is in use, this means that gpio 2, 4, 12, and 13 are used. Does this mean that I could not connect any wirings to these pins in any case at all if I use the microSD card slot? *In the context of my project, the microSD is not used for images but for text in a csv format.

By: nour

nour — Tue, 21 Jan 2025 13:03:50 +0000

In reply to Senel Canik. hi did you find a solution ?