This past saturday, I updated 4 ESCs from 208 to 212...
The two ESCs I owned updated no problem and were 100% functional after the first update, but the other two had random issues. The one we were able to fix by flashing it again, it happened to work on the 3rd attempt, but the last one...
After the flash, the ESC was acting weird. It would allow me to flash and program it through the hotwire, but it wouldn't beep or enter the typical startup sequence. The first two and last two lights on the ESC would blink ultra-fast. The way we fixed it was to put it on a system with 208 and downgrade it, unfortunately. Of course, we attempted to flash it multiple times. We could not even get it to get into the endpoint setup. Tried everything, including rebinding, different battery, different TX/RX... nothing worked until we reflashed it back to 208.
Any ideas what could've gone wrong?