, selecting "Uno" or "Nano" is essential for correct screen display formatting. Leaving it as default can cause display scaling issues. Click Program (or Upload) to flash the firmware.
Use the MODE button to cycle through modes (AM, LSB, USB, etc.).
For those who want to go even further, the hardware of the ATS-20 is ripe for modification.
Ensure you performed the EEPROM reset (holding the encoder while turning it on).
Your computer needs the CH340 USB driver installed to communicate with the radio.
1. "Failed to upload" / "Avrdude: stk500_getsync() attempt 1 of 10"
If turning the knob clockwise moves the frequency down instead of up, you need to invert the encoder pins in the software. Look for the encoder pin definitions (typically labeled ENCODER_PIN_A and ENCODER_PIN_B ) and swap their assigned numbers. 4. Severe Distortion on SSB
Do you plan to compile the code yourself or use a ?
Understanding ATS20 Firmware: Features, Updates, and Flashing Guide
ATS 20+ : ATS_EX Firmware... adding the battery level circuit.
: Power off your ATS20, connect it to your PC, and then power it on. Your computer should assign it a COM port. Configure XLoader : Set the Filepath to your downloaded firmware. Set the Device to Duemilanove/Nano(ATmega328) . Select the correct COM Port . Set the Baud Rate (usually 57600 or 115200 ).
Fine-tuning steps (down to 1 kHz or less) make clarifying SSB voice and Morse code (CW) significantly easier.
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.
This is where the world of steps in, transforming a cheap gadget into a capable receiver.
Most ATS20 units use the CH340 USB-to-Serial chip. Ensure the CH340 driver is installed on your PC so the device is recognized as a COM port. Method A: Flashing via Arduino IDE (From Source Code)
For a few dollars worth of a programmer and 10 minutes of your time, you get a radio that rivals devices costing three times as much.