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How To Install Pre-Built Firmware Onto HomeBrew Gen3 Hardware

Do NOT use this method if your device already has firmware v8.1 or newer installed! Instead, see here, and/or here!

A way to program the latest HomeBrew firmware onto devices that don't already have v8.1 or newer, is to use the ESP32 Flash Download tool on MS-Windows. Click here to get the tool, and click here for the firmware image. Then click on the first photo below for step-by-step instructions.

The firmware used to be named esp32_wifi.bin and some of the photos still show that older name instead of the new hbg3.bin name.

Note: This flashing method also wipes all settings from the device.

Install the Universal CP210x Serial Port drivers in MS-Windows (from here). Extract the driver ZIP contents, then right-click on the extracted silabser.inf file, and click INSTALL. You should now be able to connect the HomeBrew USB to the PC and see it be assigned a COM port. With that out of the way proceed as follows: Unzip/Extract the Flash Download Tool, and then click on the .EXE file within it. Two windows should pop up, as shown.
Select ESP32 for the Chip Type.
Then click on OK.
A different window pops up. Download the latest HomeBrew Gen3 firmware image file, and then click on the "..." in the middle of the first table entry. Browse to the downloaded file, and enter its path into the Green area. Put a zero (0) in the smaller entry field to the right of it, and click the checkmark on the left. Down at bottom right, select the appropriate COM port for the HomeBrew/ESP32 from the drop-down menu there.
Now click on the BAUD pull-down, and select 921600. With everything filled in and looking more or less like this, it's time to click on START.
The black text window should come to life, and after a pause the green Download block will show. Watch/wait for the green progress bar at the bottom.
Eventually, the flashing will finish, and the word FINISH will show in the block. Blue in this case, but it might be green on your machine. All done. The HomeBrew Gen3 now has the new firmware!
Click on any thumbnail to view larger images