Before connecting the radio, install the USB-to-Serial driver (often Prolific or CH340) for your programming cable.
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Programming cannot be done via standard USB cables; specific hardware is required: Data Cable: A standard K-plug (two-pin) USB programming cable. USB Driver: You must install a compatible USB-to-Serial driver , such as the Prolific PL2303 FTDI driver , depending on the chip used in your programming cable. Download Resources Before connecting the radio