When upgrading ELRS receivers, there are primarily two options: Wi-Fi and Serial Port. While Wi-Fi upgrading is very user-friendly and doesn't require additional accessories, it can be susceptible to failures caused by unstable networks.
 
 
For a more reliable and professional upgrade experience, RadioMaster ExpressLRS UART Flasher is your solution. This dongle is designed specifically for ELRS receiver serial port upgrades, providing a dependable and professional solution for flashing or recovering receivers with a bad flash.
 
 
 
- Equipped with multiple protective circuits, including overcurrent and reverse protection
  
- Optionable 3.3V and 5V output voltage
  
- Standard 2.54mm pins
  
- RM-CRSF JST-GH interface output for versatile connectivity with compatible ER series receivers
  
- Featuring a spring-loaded pin socket for enhanced convenience
  
- Comes with DuPont wires for easy 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 serial TX, connected to the RX port of the serial port tool. The third channel is repurposed as RX, connected to the TX port of the serial port tool.
  
- 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 by using a 4-wire CRSF cable.
  
 
 
How to upgrade firmware
 
 
- Connect the Serial Port Cable with receiver
  
- Press the receiver's BOOT button, and insert the serial port tool into your computer
  
- Follow the ELRS upgrade tool's instructions to complete the upgrade
  
 
 
Package Includes
 
 
- 1 * RadioMaster ExpressLRS USB Uart Flashing Tool
  
- 1 * Pogo Probe
  
- 1 * 1.25mm Serial Port Cable - Type A
  
- 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
  
                                                                                             
                                            
                                        
                                        
                                            
        Product safety information
        
                
            
    Manufacturer information:
    
        Radiomaster
        4/F, Yang Tian Building, Yang Tian Road, Xin'an Street, Bao'an District, Shenzhen 
                GuangDong, China, 518101
                    
 
         
                        
            
    Responsible person:
    
        Mahmoudi Modellsport
        Kaiserstraße 6
        Bayern
        Schönbrunn, Deutschland, 85244
        info@mahmoudishop.de
        https://www.mahmoudishop.de