{"product_id":"radiomaster-expresslrs-flasher-v2","title":"RadioMaster ExpressLRS USB UART Flasher V2 USB-C 3.3V\/5V RM-CRSF for ELRS Receiver Firmware Update","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe RadioMaster ExpressLRS USB UART Flasher V2 is a USB UART Flasher for reliable ExpressLRS (ELRS) receiver firmware updates and firmware recovery via a serial (UART) connection. V2 upgrades to a USB-C interface and adds a built-in power button for one-touch power cycling during flashing, helping avoid the instability sometimes encountered with Wi-Fi upgrades.\u003c\/p\u003e\u003cp\u003eIt supports multiple connection methods, including a standard 2.54mm pin output and an RM-CRSF JST-GH port for plug-n-play connection with RadioMaster ER series receivers. For product selection or setup help, contact support@rcdrone.top or visit https:\/\/rcdrone.top\/.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUpgraded USB-C interface (USB-C cable not included)\u003c\/li\u003e\n\u003cli\u003ePower button for easy ON\/OFF power cycling\u003c\/li\u003e\n\u003cli\u003eEquipped with multiple protective circuits\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection and reverse polarity protection\u003c\/li\u003e\n\u003cli\u003eOver-voltage protection\u003c\/li\u003e\n\u003cli\u003eSwitchable power supply between 3.3V and 5V\u003c\/li\u003e\n\u003cli\u003eStandard 2.54mm pins\u003c\/li\u003e\n\u003cli\u003eRM-CRSF JST-GH port for simple plug-n-play connection with RadioMaster ER series receivers\u003c\/li\u003e\n\u003cli\u003ePin sockets included\u003c\/li\u003e\n\u003cli\u003eDupont cables for convenient testing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eExpressLRS USB UART Flasher V2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB interface\u003c\/td\u003e\n\u003ctd\u003eUSB-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput voltage\u003c\/td\u003e\n\u003ctd\u003eSwitchable 3.3V \/ 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs \/ ports\u003c\/td\u003e\n\u003ctd\u003eStandard 2.54 pin output; RM-CRSF interface output (JST-GH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eBuilt-in power button (power cycling)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e46.30mm x 21.50mm x 10.20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eCompatible Receivers\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eUsing 2.54mm pin output and spring-loaded pin adapter or Test hook adapters:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eAll RP SERIES ELRS RECEIVERS\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eUsing regular 2.54mm pin output (Servo plugs):\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eER3C-i 2.4GHz ELRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER5C-i 2.4GHz ELRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER4 2.4GHz ELRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER5A 2.4GHz PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER5A V2 2.4GHz PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER5C 2.4GHz PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER5C V2 2.4GHz PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER6G \u0026amp; ER6GV ELRS PWM Receiver\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003ePlease 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.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFirmware upgraded by RM-CRSF interface output:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eER6 2.4GHz ELRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8 2.4GHz ELRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8G \u0026amp; ER8GV ELRS PWM Receiver\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003ePlease note: The above receivers can be connected to the receiver's CRSF port using a 4-wire CRSF cable.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eFirmware Upgrade Instructions\u003c\/h2\u003e\u003col\u003e\n\u003cli\u003eConnect the Serial Port Cable with the receiver.\u003c\/li\u003e\n\u003cli\u003eConnect to the computer with a USB extension cable, press the receiver's BOOT button, then press the POWER button on the serial tool.\u003c\/li\u003e\n\u003cli\u003eFollow the ELRS upgrade tool's instructions to complete the upgrade.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch2\u003eDownloads\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/drive.google.com\/file\/d\/1vosZCXgcBaKEXBofYgjDC5Yz5UL_BIn1\/view?usp=sharing\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eUSB to UART driver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/USB_UART_Tool_Connection_Guide.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eUSB UART Tool Connection Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Includes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 * RadioMaster ExpressLRS USB UART Flasher V2\u003c\/li\u003e\n\u003cli\u003e1 * Pogo Probe\u003c\/li\u003e\n\u003cli\u003e1 * CRSF Wire\u003c\/li\u003e\n\u003cli\u003e1 * 2.54mm Serial Port Cable - Type B\u003c\/li\u003e\n\u003cli\u003e1 * Serial Port Test Hook - White\u003c\/li\u003e\n\u003cli\u003e1 * Serial Port Test Hook - Green\u003c\/li\u003e\n\u003cli\u003e1 * Serial Port Test Hook - Red\u003c\/li\u003e\n\u003cli\u003e1 * Serial Port Test Hook - Black\u003c\/li\u003e\n\u003cli\u003e1 * User Card\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"RadioMaster ExpressLRS USB UART Flasher V2 USB-C tool for ELRS receiver firmware update and recovery\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2-USB-C-33V5V_5ec05bac-ab8b-47d7-a680-777cdb657a89.webp?v=1780746259\"\u003e\u003cp\u003eUpdate and recover ExpressLRS receiver firmware over a stable UART connection using the USB‑C Flasher V2.\u003c\/p\u003e\n\u003cimg alt=\"Close-up of RadioMaster ExpressLRS USB UART Flasher V2 highlighting multiple protective circuits\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2.jpg?v=1780745964\"\u003e\u003cp\u003eBuilt-in protection circuits help guard against overcurrent and reverse polarity during bench flashing.\u003c\/p\u003e\n\u003cimg alt=\"ELRS receiver connected by UART wiring for quick firmware upgrade using the USB UART flasher\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_36c20136-4c32-441d-a262-2a26032f2b80.jpg?v=1780745970\"\u003e\u003cp\u003eA direct serial connection keeps firmware upgrades reliable when Wi‑Fi flashing is unstable.\u003c\/p\u003e\n\u003cimg alt=\"USB-C connection from laptop to RadioMaster ELRS USB UART Flasher V2 with ELRS receiver lead attached\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_97e3253e-1fe9-4075-b2dc-afea579060bf.jpg?v=1780745977\"\u003e\u003cp\u003eUSB‑C makes connecting to your computer simple, while the flasher powers the receiver during updates.\u003c\/p\u003e\n\u003cimg alt=\"Built-in power button on the flasher for one-touch power cycling during ELRS receiver flashing\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_ca565226-5687-4dba-8d7f-80b27bba786b.jpg?v=1780745983\"\u003e\u003cp\u003eOne-touch power cycling via the onboard button helps speed up boot\/flash steps without replugging cables.\u003c\/p\u003e\n\u003cimg alt=\"Multiple connection accessories for the flasher including RM-CRSF cable, pogo probe and UART leads\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_2c006719-7ed3-47a6-8d0c-d92fbd8bb3af.jpg?v=1780745989\"\u003e\u003cp\u003eChoose from RM‑CRSF plug‑and‑play or standard pin\/wire connections to match different receiver layouts.\u003c\/p\u003e\n\u003cimg alt=\"Feature callouts: switchable 3.3V\/5V output, RM-CRSF JST-GH port, USB-C port, and 2.54mm pin output\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_2f339d28-d662-4d73-b3a3-52b0b8ce4e3e.jpg?v=1780745995\"\u003e\u003cimg alt=\"RadioMaster USB UART Flasher V2 dimensions diagram showing compact size 46.30×21.50×10.20 mm\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_8aa3aa4e-9a00-4de4-bc14-9488d4afeed9.jpg?v=1780746000\"\u003e\u003cimg alt=\"Package contents: ExpressLRS USB UART Flasher V2, CRSF wire, pogo probe, test hooks, and 2.54mm UART cable\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ExpressLRS-USB-UART-Flasher-V2_99ea97df-f50e-4ef0-a95e-3da153127564.jpg?v=1780746014\"\u003e\u003cp\u003eEverything needed for common setups is included—flasher, CRSF lead, pogo probe, test hooks, and a 2.54mm UART cable.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RadioMaster","offers":[{"title":"Default Title","offer_id":52970683400416,"sku":"HP0157.USBUART-V2-1","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/01_0e85adba-bdb1-451b-93d7-9e30b7308bd8.jpg?v=1780597494","url":"https:\/\/rcdrone.top\/es\/products\/radiomaster-expresslrs-flasher-v2","provider":"RCDrone","version":"1.0","type":"link"}