ESP32 Forum

Dear,

Please find below the Schematic connection of the ESP32-D2WD SOIC based custom board design.

I use the ESPProg UART flash method to flash code.

I am successfully able to detect chips as well as able to flash a code using Arduino IDE.

But My issue is code does not run except what we write.

I got continue 115200 Serial rate data over the terminal monitor.

Can anyone confirm what is the exact issue?? based on data its continue SW RESET.

Write code for toggle GPIO as well as Dump "DATA" over serial 9600Bps but I can not show the result Yes, Code flash successful but some issue with RESET SW.

Use ESPProg:- https://www.digikey.in/product-detail/e ... OcQAvD_BwE

You can find connections, as well as serial data over, attach the image.

You are aware that the D2WD chip already has 2MByte internal flash in it? Connecting an external flash to the same pins the internal flash is on probably leads to issues.

I don't think the issue is we use an external flash.

We already try the design without EEPROM a month ago and we got an issue that can not upload/Flash chip so based on the forum we got the solution to add external EEPROM.

Also, have you check as per Espressrif reference design document page 10 (2.3 Flash (compulsory) and PSRAM (optional))

How we identify internal flash use that one pin ??? Also, We do the same pin connection as well as guide by ESP32 reference design.

https://www.espressif.com/sites/default ... nes_en.pdf

So I don't think it's a flash issue.

Esp32-d2wd is special, it has "external" flash die placed inside the package. Also it is 1.8v flash. It uses pins 16&17 for clk and cs and efuse are burned to use these pins. So you should use esp32-d0wd with separate flash chip.

Hey,

Thank you.

What is the step if I would like to go with the internal Flash of ESP32-D2WD?

I order ESP32-D0WD and check it But need time to deliver Chip.

I want to run that board withESP32-D2WD I (I already test:- remove external flash and try to upload code but the board does not except ESP32-D2WD not upload code without external flash)

Can you suggest what I can do to work with ESP32-D2WD?

Bootstrap it to 1.8v vddsdio and hope the flash was not damaged when you were running it at 3.3v. if it isn't working post the logs from flashing and booting and espefuse dump.

Thanks,

As I check I am not able to find out any ESP32-D2WD SOIC based reference design Even I am not able to find any ESP32-WROOM or WROOVER module inside that ESP32-D2WD Used.

Can you help me to find out the Document for ESP32-D2WD SOIC based reference design Or any tested hardware which shows a 1.8V power supply for internal Flash / Which pin use to power 1.8V internal Flash?

I have ESP32 Series as well as ESP32-D0WD based reference design as well as ESP32-WROOM and WROOVER reference design in which ESP32 other variant use I would like ESP32-D2WD based reference and Module.

Thanks.

Thanks,

As I check I am not able to find out any ESP32-D2WD SOIC based reference design Even I am not able to find any ESP32-WROOM or WROOVER module inside that ESP32-D2WD Used.

Can you help me to find out the Document for ESP32-D2WD SOIC based reference design Or any tested hardware which shows a 1.8V power supply for internal Flash / Which pin use to power 1.8V internal Flash?

I have ESP32 Series as well as ESP32-D0WD based reference design as well as ESP32-WROOM and WROOVER reference design in which ESP32 other variant use I would like ESP32-D2WD based reference and Module.

Thanks.

Esp32 has internal flash voltage regulator for vdd_sdio which is set to 1.8v by strapping pin or efuse

Can you share any reference design with ESP32-D2WD based SOIC?

I already test with ESP32-S2WD but no luck I am not able to upload over that it's some flash issue May I Know what is an issue with ESP32-S2WD??

Also, I will get ESP32-D0WD before the weekend And I will follow your instruction and hopefully I will get running board soon.

Thanks,
AB.