ExpressLRS Recovery Dongle is an FTDI USB to TTL module based on the CP2102 bridge controller, which is applied to the firmware upgrade for the ESP32&ESP8XX chip. The ExpressLRS Recovery Dongle is compatible with many ELRS receivers in the market such as ELRS Lite Receiver, ELRS Nano Receiver, ELRS Micro Receiver, and FPV goggles backpack. It will be a good choice to unbrick the ELRS receiver when failed in updating or flash firmware by UART.
ExpressLRS Recovery Dongle (FTDI Module) is mainly used to unbrick the ELRS receiver when having a failed update by Wifi upgrading or passthrough but also provides the UART way to upgrade the ELRS receiver or backpack. This FTDI module features spring probe pins and a connector for non-soldering use, which is more convenient for users. Besides, it is very durable and portable with a shell.
Below picture is the diagram for the ExpressLRS Recovery Dongle.
Please click the below link to know how to use the ExpressLRS Recovery Dongle. This module requires the driver for the Windows system and there is no need if you are using MAC or Linux.
This video will help you to know how to flash firmware via FTDI.
Note: The package does not include the Type-C USB cable. Please make sure you have available one.