Thanq so much for your replies guys! The issue is resolved. On our PCB, we added resistors( zero ohms) and capacitors on the D+, D- lines as suggested by espressif. But, we are using esp32s2 controller and NOT soc. This leaves all our resistors and capacitors(maybe) prone to external noise,thus res...

Can you provide schematics if it's a custom board?
Do you have any cap on d+/- lines?

-- john

I would switch place with FreeRTOS & IDF

Its really easy. Just follow the docs at:
https://docs.platformio.org/en/stable/p ... board.html

Hi,

IO2 + IO8 should be pulled up
IO9 you can leave floating and ground when you want it to go into download mode

At least that's what I'm doing.

-- john

I didn't see the usb-device until I booted the C3 in download mode...

Hi,

esp32-s2 has in its datasheet (page 42) specific pin state At Reset & After Reset. I would assume this is during the pin EN low and when EN is high.

esp32-c3 only has the pin state specified (page 17) for After Reset. Is there no difference between At/After Reset for this chip?

-- john

** Programming Started ** Info : PROF: Data transferred in 574490 ms @ 0.369023 KB/s ** Programming Finished ** ** Verify Started ** ** Verified OK ** Info : JTAG tap: esp32c3.cpu tap/device found: 0x00005c25 (mfg: 0x612 (Espressif Systems), part: 0x0005, ver: 0x0) ** Programming Started ** Info : P...

It seems to be working. But very slow: PS C:\projects\proj1> C:\Users\john\.platformio\packages\tool-openocd-esp32\bin\openocd.exe -d2 -s C:/Users/john/.platformio/packages/tool-openocd-esp32/share/openocd/scripts -f interface/esp_usb_jtag.cfg -f target/esp32c3.cfg -c "adapter_khz 5000" -c "program_...

Hi Roland, I already had the driver installed using PowerShell cmd. Anyway, I found Zadig where I found two "USB JTAG/serial debug unit" (Interface 0 and 2). Interface 0 ========== Driver "usbser v10.0.19041.906" [green arrow ==>] WinUSB (v6.1.7600.16385) WCID had red cross mark Interface 2 ========...