⚠ Web browser uploading only works with Chromium based web browsers such as Chrome, Opera & Edge ⚠
Download the lastest release from https://github.com/DCC-EX/EX-T3-WiFi/releases (firmware.bin) then go to https://espressif.github.io/esptool-js/
Plug in the throttle to your computer and click the Connect button (You'll be prompted to select the COM port the throttle is on).
If the throttle has been detected it should read Connected to device.
On the Flash Address field change the value to 0x0 then click the Choose File button and select the firmware.bin file you downloaded earlier.
You can now click the Program button to begin uploading.
The upload progress will show below.
Wait until it gets to 100% and finishes with the output of Leaving... before disconnecting the throttle.