Qyt Kt8900 Programming Cable Pinout Top ~upd~ -

If you connect TX→TX and RX→RX, you will get nothing but timeouts.

: Ensure the 3.5mm plug is pushed all the way in. The recessed nature of the jack sometimes prevents standard bulky plugs from seating correctly. qyt kt8900 programming cable pinout top

Here is the verified pinout from the factory schematic. —the QYT KT8900 does not use a 2.5mm/3.5mm TRS jack. If you connect TX→TX and RX→RX, you will