radiomasterRadioMaster
RadioMaster ExpressLRS USB UART Flasher
Manufacturer part no. HP0157.USBUART-V2
$9.99≈ 8.66 €
Price summary
Listed by radiomaster at €8.66. Delivered to France, including shipping, VAT and any customs duty, it comes to about €28.39. Prices last checked on 2026-09-16.
Delivered cost is an estimate for a single item shipped to mainland France; the seller's checkout is authoritative.
Availability unknown
Estimated landed cost
| Item | €8.66 |
|---|---|
| Shipping | €15.00 |
| VAT (20%) | €4.73 |
| Total delivered | €28.39 |
Estimate for a single item delivered to mainland France, shipped from outside the EU: customs duty and clearance fees may apply and are charged by the carrier.
Specifications (automatically extracted)
Mechanical
| Weight | 150 g |
Description
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. We have upgraded the ExpressLRS USB UART Flaher. Click here to see the improved V2 version. Features 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 1. Connect the Serial Port Cable with receiver 2. Press the receiver's BOOT button, and insert the serial port tool into your computer 3. Follow the E
