I am getting the following error trying to use an ESP-PROG with a n ESP32 project. I had this working fine for quite a while but it isn’t working now. Error: no device found Error: unable to open ftdi device with vid 0403, pid 6010, description '*', serial '*' at bus location '*' Error: no device…

Screenshot of Zadig with the RS232-HS (Interface 0) device selected?

I don’t think this is necessarily related but I removed the ESP-PROG lines from my platformio.ini and loaded via USB. I am now getting this error: Wrote 1639376 bytes (1059229 compressed) at 0x00010000 in 26.6 seconds (effective 492.2 kbit/s)... File md5: 86cea89ac042b76c7974510c5029d8c2 Flash …

[image] atestani: I had to use a partitions.csv file (as below) to get the full 4MB of flash to be recognized. # Name, Type, SubType, Offset, Size, Flags nvs, data, nvs, 0x9000, 0x5000, otadata, data, ota, 0xe000, 0x2000, app0, app, factory, 0x10000, 0x3A0000, eeprom, …

Without the partitions.csv file, I exceed the 1MB of Flash size and can’t go from there. I did get the USB loading to work (totally erase Flash with esptool, used the boot and EN button, etc.) and that now works. So I am back to the original problem of not having my ESP-PROG be found as per the fi…

[image] atestani: Without the partitions.csv file, I exceed the 1MB of Flash size and can’t go from there Then create a new project and open a blinky sketch. We need less changing variables, not more. The baseline esptoolpy serial upload should work with your board in the most simplest case, …

I totally uninstalled and reinstalled PlatformIO. I’m also using a simple blink sketch. I can upload code via USB. So now back to the same problem in that I am unable to use an ESP-PROG. I continue to get this error despite having used zadig to set up RS-232-HS (Interface 0) to the WinUSB driver…

My development work has essentially stopped because I cannot get this to work. Does anyone have any ideas for me?

Max - I am seeing email notifications of a change on this thread but I can’t see any of your responses if you are making them. Please let me know.

[image] atestani: Error: JTAG scan chain interrogation failed: all zeroes Error: Check JTAG interface, timings, target power, etc. Error: Trying to use configured scan chain anyway… Error: esp32.cpu0: IR capture error; saw 0x1f not 0x01 This looks better than before in the sense that it ha…

OpenOCD - No Device Found

tombaier63 January 30, 2026, 8:19am 17

@atestani

Did you ever found a sulution for this problem? I’m faced with exactely the same issue. I’m blocked for weeks without the capability to debug into my ESP32 code.