Did you notice the word (Safe) in the lower left corner of the HUD? This means the safety switch feature is enabled and you did not press it yet. If you do not have a switch connected, you have to set the BRD_SAFETYENABLE parameter to 0.
I have checked the cable connection. I have doubt with the ESC BLDC connection to the pixhawk. I connected only White wire(Signal) and neglected the Black and Red(But connected one Black and Red). From 1 to 8, i used 1 to 4. If there is any correction in this connection, please tell me.
I have the safety switch connected with pixhawk, several times i pressed the same. But same response for BLDC. It’s showing ARMED, but BLDC continue beep sound.