Yes, if you wire a Bluetooth module (HC-05) to pins 1,2,3,6 using the TTL-level signals. The “top” pinout remains the same.
When looking for the "top" pinout, we are referring to the orientation where the cable connector is inserted into the radio’s accessory port (speaker/mic jack) with the retaining screw facing away from you. qyt kt8900 programming cable pinout top
Most programming cables for this radio are comprised of a USB-to-Serial adapter (often using the Prolific PL2303 or FTDI chipset) and a 3.5mm TRRS (Tip-Ring-Ring-Sleeve) or TRS style plug. Yes, if you wire a Bluetooth module (HC-05)
Here is the typical logic flow for the connector found on the QYT KT-8900 accessory port: Note: On some KT-8900 variants, the specific function
Note: On some KT-8900 variants, the specific function of the PTT and Data lines can be bridged internally within the cable. This is why "homemade" cables often fail—the radio expects a specific resistance or bridging configuration on the data lines to recognize a programming session versus a speaker-mic session.
Inside the programming cable, the two plugs are wired to a USB-to-TTL serial adapter (often a Prolific PL2303 or CH340 chip):