Waveshare ESP32 One

[derbmann]

Hi,

I got the Waveshare ESP32 One and i wanted to use your program on it. Sadly i got a bit of trouble with it, most likely because I'm a beginner...

I did change the camera pins to.:

define PWDN_GPIO_NUM -1

define RESET_GPIO_NUM -1

define XCLK_GPIO_NUM 4

define SIOD_GPIO_NUM 18

define SIOC_GPIO_NUM 23

define Y9_GPIO_NUM 36

define Y8_GPIO_NUM 37

define Y7_GPIO_NUM 38

define Y6_GPIO_NUM 39

define Y5_GPIO_NUM 35

define Y4_GPIO_NUM 14

define Y3_GPIO_NUM 13

define Y2_GPIO_NUM 34

define VSYNC_GPIO_NUM 5

define HREF_GPIO_NUM 27

define PCLK_GPIO_NUM 25

(Because the CameraWebServer example works with these settings.)

But the actual problem is now the SD card. The card reader is connected to.:

SD Pin -> ESP32 Pin 1 -> NC 2 -> IO15 3 -> IO13 4 -> VDD_SDIO (3,3V) 5 -> IO14 6 -> GND 7 -> IO12 8 -> NC 9 -> GND

This means its connected to SPI in the HSDPI pinout. Since i got the SD_Test sketch working ill think I'm right to this point.

But since you are using the sd_mmc i can't use the card reader with it, right?

Just for testing purpose I desoldered the card reader and connected the following pins to it.:

SD Pin -> ESP32 Pin 1 -> NC 2 -> NC 3 -> IO15 4 -> VDD_SDIO (3,3V) 5 -> IO14 6 -> GND 7 -> IO2 8 -> NC 9 -> GND

The SDMMC_Test sketch is working with these connected pins in the 1-bit mode SD_MMC.begin("/cdcard", true);. And after adding pinMode(2, PULLUP); to line ~1457 at static esp_err_t init_sdcard() your program finally was able to read the sd card but fails later again with some sd error on the startup.

Startup-Log & Settings: startup.txt TimeLapseAviA1x.ino.txt settings.h.txt

I'm now at the end of my knowledge and need your/someones help pls. What did I wrong or need to change to get it working?

Thank you, derbmann

[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.

[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

[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]

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.