USB Linker

A USB linker is required for firmware installation, updating, and configuration

• Recommended item from Amazon https://www.amazon.com/gp/product/B0CCXGFSB3/ , the one I use
• From Just Cuz Robotics, a fellow robotics hobbyist: https://justcuzrobotics.com/products/usb-programmer-for-am32-blheli-blheli32-escs
• From Pearl Grey, a fellow robotics hobbyist: https://shop.pearlgrey.io/product/esc-programmer-1-2-usb-c-blheli_s-blheli_32 (make sure you purchase the option including the Arduino Nano)
• https://store.airbot.racing/products/am32-programming-adapter-for-esc this one allows you to choose between half-duplex and full-duplex, you need to short the jumper to put it into half-duplex mode

NOTE: These are not typical USB-to-UART converters, these particular USB-linkers are designed specifically for communication with ESCs using half-duplex (one wire). Do not attempt to use ordinary "FTDI cables" or "USB to RS232" or anything that doesn't use half-duplex.

These might need USB drivers, here are links to the most popular USB drivers (depends on which linker you are using)

• FTDI drivers https://ftdichip.com/drivers/
• SiLabs drivers https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers
• CH340 drivers https://learn.sparkfun.com/tutorials/how-to-install-ch340-drivers/all