ESP-Prog JTAG Development Debug Downloader Program Downloader Module Jtag Debug Downloader for ESP8266 ESP32

I've had a few instances of getting an Espressif devkit into a "non-bootable" situation and nothing I've been able to do using the onboard usb interfaces allows me to recover the hardware. On a whim I pick this up and have been able to get those boards back into my collection of working MCU's by connecting to them directly via the hardware JTAG interface. This has been a life saver when it comes to recovering these bricked boards.I have not really used it for anything other than direct JTAG program recover as I prefer to use other methods for flashing in my workflow.The printed text is easy to read and the board quality is better than other PCB's that I've encountered.

This is a very nice tool for development and debugging ESP32 projects. I believe it could also help with customizing products (often "smart home" products) that use ESP8266/ESP32 if the board happens to have a functioning JTAG interface.

The included ribbon cable is the mini size (I think 1.27mm) instead of the standard 2.54mm--which is actually nice. I have extras of the standard sitting around, but very few of the small ones.It does not have any other connector to fit directly into the ESP8266/ESP32, so you'll have to figure that out if you don't already have an adapter board or breakout pins on your module. In a pinch, regular Dupont jumper cables will fit into the 2.54mm pins, no need for IDC ribbon cables.It uses the FT2232HL chip. You can download FTDI VCP drivers from the FTDI website if you don't already have it. I'm using Zadig also, and it works well with PlatformIO.