Top Positive Review for 20x20mm F4 flight controller; f4 hd dji fc on Banggood

20x20mm SKYSTARS Karmam F405 HD MINI F4 OSD 3-6S Flight Controller w/ 5V 10V BEC Output Support VISTA HD DJI Air Unit for RC FPV Racing Drone US$47.99 View It

Overall:

maverickit 15/04/2021

This could be the best flight controller,, but... 1) The BOOT button did not work for me (The device was not even listing in the devices in windows) -I have investigated this and fiound out that the button must pull BOOT0 pin of the MCU to VDD, but when the FC is connected to the usb, there is no 3.3v on the other side of the button. 2) There is no INAV build for this FC. -I have tried the one for MATEKF405-SE and it bricked my Baro. (Actually, the rest was working not sure if UARTS are in the right order as on PCB) 3) After I have reflashed to BF, the baro is not working anymore. 4) The support chat of the facebook group of SKYSTARS answers to do the things that i have already did despite that i have descrbed the problem and I am not a total newbie. 5) SKYSTARS website downloads page leads to nowhere so they even not giving pin definitions or a complete BF build for the FC. Overall it is very very very good quality soldered pcb, it is nice and tiny, it has baro and many uarts. It could have been the best flight controller for the price.

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