Waveshare ESP32 One

[derbmann]

Waveshare ESP32 One

[jameszah]

Are you re-using pin 14 - camera and sd?

I'll have to compare the schematics to see which data pins the sd uses in 1-bit mode.
The unused pins could be left hanging to prevent interaction. I think gpio4, 12, 13 are the unsed pins on the esp32-cam ai-thinker module sd card connection and gpio2 is the 1-bit.

So I think you are also using gpio2 for the data0, and your data1 and data2 are disconnected from the sd connector (the red X). And cd/data3 was gpio15 and is now disconnected.

You could disconnect 14 and 15 and try it. The camera might be turning on 14, which is disturbing the sd card.

[jameszah]

gpio14 is h2s_clk, spi_clk, MTMS?

You probably need that one, so you would have to tell sd_mmc to use another gpio for that one, as I don't imagine you could move a gpio from the camera connector to use another pin for the gpio14 on the camera.

[jameszah]

When using the camera gpio14 is an input to the esp32 (y4 - data line), when using the sdcard gpio14 is an output (sclk clock)
so independently they will work, but not at the same time.

[derbmann]

Sry for the late response, i was busy the last few days...

Since GPIO14 is a clock signal and the board comes wired like that, I don't think that's the issue.
The sd_mmc test works fine but i somehow get the feeling that my ghetto wiring is the issue.

I meanwhile found out that you can use the sd_mmc in the spi mode.
I reverted back the sd card slot to the original spi mode and now try to get the sd_mmc test in the spi mode working.
After that ill try to implement it in your program.

Ill response if I got success or not.

thanks

[derbmann]

You are absolutely right, I did ask waveshare about it and they confirmed it.
What a great product...

I guess I could add a external sd card module but I'm done with it.
I just order a proper esp32 cam module.

Thank you for your help.