Hi! i recently buy a used mini quad, i try to find what kind of firmware version of setting in betaflight to make communicate my Spektrum serial receiver to my FC.
when i connect the battery the receiver light didnt flash. all setting in betaflight seem ok.
esc: exuav rc mini f4 / 20a x4
fc: exuav mini f4 v1.1
receiver : Spektrum FPV racing serial receiver / SMP 4648
Receiver is likely dead it just needs 3.3V and GND hooked up so either it isn't getting that from FC cause of blown voltage regulator or receiver was previously damaged from overvolting. These spektrum satellite receivers go into binding mode automatically if no bound transmitter is found in something like 5 seconds and when in binding mode the light flashes, if a bound transmitter is found the light goes solid and it doesn't enter binding mode.