flash download tool

hengis
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Joined: Mon Mar 05, 2018 3:59 pm

flash download tool

Postby hengis » Tue Sep 30, 2025 2:22 pm

I am trying to use the flash download tool for sn esp32. When I examine the bin file it is empty. What am I doing wrong

Sprite
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Re: flash download tool

Postby Sprite » Wed Oct 01, 2025 1:07 am

You need to give us a bit more information than that. How exactly are you using the flash download tool; what parameters are you filling in and what files are you using? What did you expect to happen? What did actually happen? How did you come to that conclusion?

hengis
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Joined: Mon Mar 05, 2018 3:59 pm

Re: flash download tool

Postby hengis » Wed Oct 01, 2025 1:43 pm

I bought a esp32 board with other components which I have been looking for. Unfortunately there is no chip to link the USB data input to the esp32. I am using a USB to serial unit (FTDI) and following the instructions on the Expressif Flash Download Tool User Guide

The com port is recognised ok. when I follow the instructions everything seems ok until I try to download the files nothing happens. When I open the bin file which is part of the download from Expressif it is empty.
What am I missing?

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krzychb
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Re: flash download tool

Postby krzychb » Thu Oct 02, 2025 12:56 am

The download package does not include any bin files besides the '"flash_download_tool_3.9.9_R2.exe" itself. All the folders (including "bin" folder) are empty by default.
flash-download-tool-folders.png
flash-download-tool-folders.png (97.59 KiB) Viewed 1378 times

Can you connect to the chip from the "chipInfoDump" tab and see some information like below?
flash-download-tool-chip-info.png
flash-download-tool-chip-info.png (233.63 KiB) Viewed 1378 times

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