I am building my own drone. I bought some parts online and put them together. Then I got a problem. The ESC has 3 SIGNAL wires (ground, power and signal) but my flightcontroller board has only 2 inputs for (ground and signal) the ESC's. I still soldered the other wires to the board and tested it with betaflight motortest and with my controller but the motors don't rotate. The reciever works fine and I measured that there was power going through the ESC power input cables but there was no power on the ESC output cables. I hope you guys can help me.
Links for my parts:
Picture of the drone: https://drive.google.com/file/d/1cXzUKkSvqdDQEIiowcJ0l6OSG408dKEnLw/view?usp=sharing