Upgrade your ELRS firmware with ease using our simple and effective tool. The new V2 version features a USB-C interface, enabling you to connect the tool to your PC via cable. The new power button allows effortless power cycling with a single press, eliminating the need to struggle with cables while holding down buttons. Our streamlined design makes preparing your receiver for a firmware update faster, easier, and more efficient than ever!

When it comes to updating your ELRS receivers, you’re faced with two options: Wi-Fi or Serial Port. While Wi-Fi upgrading may seem convenient, it can be unreliable due to network instability. This can result in a bad flash, requiring recovery with a UART tool. That’s where the V2 ExpressLRS USB UART Flasher comes in, offering a reliable and easy solution for your firmware upgrade needs.

With the RadioMaster V2 ExpressLRS USB UART Flasher, your wireless connection won’t be a concern. This dongle is specifically designed for ELRS receiver serial port upgrades, providing a reliable and easy solution for flashing or recovering receivers with a bad flash.

Our USB flashing tool is a versatile solution, not limited to ELRS serial port upgrades. It comes with a range of connection options, allowing easy connection to our entire range of receivers. By switching between 3.3v and 5v, it can also be used for other devices requiring a UART interface. This versatility makes it a valuable addition to your toolkit, catering to all your firmware upgrade needs.

Check out all our ExpressLRS Products,Receivers,and the rest of ourRadioMaster Products!

Features

• Upgraded USB-C interface
• Power button for easy ON/OFF power cycling
• Reverse polarity protection
• Over-voltage protection
• Switchable power supply between 3.3V and 5V
• Standard 2.54mm pins
• RM-CRSF JST-GH port for simple plug-n-play connection with RadioMaster ER series receivers
• Pin sockets included
• Dupont cables for convenient testing

Compatible Receivers

Using 2.54mm pin output and spring-loaded pin adapter or Test hook adapters:

• All RP SERIES ELRS RECEIVERS

Using regular 2.54mm pin output (Servo plugs):

• ER3C-i 2.4GHz ELRS PWM Receiver
• ER5C-i 2.4GHz ELRS PWM Receiver
• ER4 2.4GHz ELRS PWM Receiver
• ER5A 2.4GHz PWM Receiver
• ER5A V2 2.4GHz PWM Receiver
• ER5C 2.4GHz PWM Receiver
• ER5C V2 2.4GHz PWM Receiver
• ER6G & ER6GV ELRS PWM Receiver

Please note: The second channel is repurposed as a TX for the serial port tool’s RX port, while the third channel is repurposed as an RX connected to the serial port tool’s TX port.

Firmware upgraded by RM-CRSF interface output:

• ER6 2.4GHz ELRS PWM Receiver
• ER8 2.4GHz ELRS PWM Receiver
• ER8G & ER8GV ELRS PWM Receiver

Please note: The above receivers can be connected to the receiver’s CRSF port using a 4-wire CRSF cable.

Firmware upgrade instructions

1. Connect the Serial Port Cable with the receiver
2. Connect to the computer with a USB extension cable, press the receiver’s BOOT button, then press the POWER button on the serial tool
3. Follow the ELRS upgrade tool’s instructions to complete the upgrade

Download

• USB to UART driver
• USB UART Tool Connection Guide

Size

Package Includes

• 1 * RadioMaster ExpressLRS USB UART Flasher V2
• 1 * Pogo Probe
• 1 * CRSF Wire
• 1 * 2.54mm Serial Port Cable – Type B
• 1 * Serial Port Test Hook – White
• 1 * Serial Port Test Hook – Green
• 1 * Serial Port Test Hook – Red
• 1 * Serial Port Test Hook – Black
• 1 * User Card