SPRACING F3 motor output not working


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my setup is simple, a spracing f3 (I found it in an old quad under the basement), 4 x BLHeli_S, and cleanflight for flashing firmware. All the sensor and receiver work fine, but cleanflight or blhelisuite can only recognize escs as well as control motors that connect to port 1 and port 3, the other port (there are total 8 ports) doesn’t get recognized. I have tested all my escs and motors on other setup and it worked fine so I know that problem must be the fc


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