: Use a high-quality Mini-USB (for older models) or USB-C data cable. Avoid "charging-only" cables.
Turn off the ATS20 and connect it to your PC via USB. Turn the radio on. Open . Browse and select your downloaded .hex firmware file. ats20 firmware
This is almost always caused by a missing CH340 driver or a bad USB cable. Ensure you are using a data-transfer cable, not a charge-only cable. : Use a high-quality Mini-USB (for older models)
(and its sibling, the ATS-20+) , a budget-friendly, highly capable receiver built around the powerful and an Arduino Nano microcontroller. ats20 firmware