Strip the wires to find GND, RX, and TX. You may need a multimeter to verify which wire corresponds to which pin on the USB-to-Serial chip (usually a PL2303, CH340, or FTDI).
| DB-9 Pin | USB Pin | Signal Name | | --- | --- | --- | | 1 | D+ | Transmit Data | | 2 | D- | Receive Data | | 3 | GND | Ground | | 7 | VCC | Power | qyt kt8900 programming cable pinout top
Please be aware that the KT8900 programming cable pinout may vary depending on the specific version of the radio and software. Always verify the pinout and software compatibility before creating your own cable. Strip the wires to find GND, RX, and TX
For a standard interface (such as CP2102 or FTDI), the connections are as follows: Tip: RX (Data from Radio to PC) Ring: TX (Data from PC to Radio) Sleeve: GND (Ground) Front Panel RJ45 Connector Pinout Always verify the pinout and software compatibility before
QYT KT-8900 3.5mm (1/8") TRS (Tip-Ring-Sleeve) plug for its programming interface. Unlike many handheld radios that use a dual-plug "Kenwood" style connector, this mobile radio utilizes a single data port on the rear of the unit. Programming Cable Pinout
: Ensure the radio is turned on and the correct COM port is selected in your software settings. Avoid using USB hubs.