I made easy vanity address generator that's Performing as Vue js PWA World-wide-web application on github-web pages right here: Of course, there isn't the USB but i see that there are pins for GPIOs and GND 5V / 3v3 so i imagine that soldering pins are ok to flash after https://lifesdirectory.com/listings12704605/new-step-by-step-map-for-trc20-browser