Overview
The MATEKSYS ExpressLRS 2.4GHz PWM Vario Receiver - ELRS R24-P6V is a PWM Vario Receiver designed for ExpressLRS systems. It features a built-in barometer (Vario) and provides 6 PWM outputs for RC control setups.
Key Features
- ExpressLRS firmware-based receiver (ESP32-PICO-D4, SX1281)
- Barometer SPL06-001 (Vario)
- 6x PWM outputs
- VBat voltage sensing support: 0~25.5V (image label: 25.5V Max.)
- Antenna diversity: antenna-switching, default ANT1
- Antenna connector: IPEX MHF-1
- Flashing support via WiFi hotspot mode and UART
Specifications
| MCU | ESP32-PICO-D4 |
| RF chip | SX1281 |
| Firmware | ExpressLRS Firmware |
| PA/LNA | SE2431L |
| RF Frequency | 2.4GHz ISM |
| Telemetry power | 22.5dbm (180mW) |
| Diversity | Antenna-switching, default ANT1 |
| Barometer | SPL06-001 (Vario) |
| Receiver output | 6x PWM CH |
| VBAT voltage sense | 0~25.5V |
| Antenna connector | IPEX MHF-1 |
| Power supply | 4-13V DC @ "V" Pad |
| Power dissipation | 60mA~80mA@5V IN |
| PCB size | 30mm x 18mm (image label: 30 x 18mm) |
| Weight | 4g w/ antenna (image label: 4g w/ 2x 15cm antenna) |
| Antenna length (included) | 15cm |
| Pad labels (as shown) | 3V3, SDA, SCL; 6, 5, 4, RX 3, TX 2, 1, VBat |
What’s Included
- 1x ELRS-R24-P6V
- 2x IPEX MHF1 Antennas, 15cm
- Dupont 2.54 pins (Board is shipped unsoldered)
Applications
- RC aircraft control setups requiring PWM outputs and Vario (barometer) support
For order or setup support, contact https://rcdrone.top/ or email support@rcdrone.top.
Manuals
- ExpressLRS PWM receiver documentation: https://www.expresslrs.org/hardware/pwm-receivers/?h=pwm
- WiFi updating guide: https://www.expresslrs.org/software/updating/wifi-updating/?h=wifi
- Firmware options: https://www.expresslrs.org/2.0/quick-start/firmware-options/
- Web flasher: https://expresslrs.github.io/web-flasher/
- Full Resolution Switch Configuration Modes: https://www.expresslrs.org/software/switch-config/?h=#full-resolution-switch-configuration-modes
Firmwares
- Receiver Target: Generic ESP32 PWM Vario 2.4Ghz RX, or RadioMaster ER6-GV, or RadioMaster ER6-G
- Receiver has ExpressLRS 3.3.2 preloaded with binding phrase "123456"; the receiver will never enter binding mode if using the traditional binding procedure.
- Reflash with a personal binding phrase, or connect to a PC/phone via WiFi and set the binding phrase in WebUI.
Flashing via Wifi
- Power on receiver. Receiver LED (Red) will blink slow at first; after 30s it should blink fast, indicating WiFi Hotspot Mode.
- WiFi SSID: "ExpressLRS RX"
- Password: "expresslrs"
Flashing via UART
- Disconnect ESC and servos from receiver first.
- Wire the receiver into the USB-TTL adapter: TX (PWM 2 pin) on receiver to RX on USB-TTL, and RX (PWM 3 pin) on receiver to TX on USB-TTL. Wire 5V and GND of the USB-TTL to "V" and GND of the receiver.
- Press the boot button while powering on the receiver, then release. The Red LED on receiver should be solid on.
- In configurator, select target Generic ESP32 PWM Vario 2.4Ghz RX or RadioMaster ER6-GV, choose UART flashing method, set bind phrase and firmware options, enable erase before flash and Force Flash.
Tips
- Powering the receiver with reverse voltage will damage the regulator chip. Double check the power wires connected to the receiver.
- Transmitter firmware version should be EdgeTX 2.7.1 / OpenTX 2.3.15 or newer.
Details

MATEKSYS ELRS-R24-P6V is a compact 30×18mm ExpressLRS 2.4GHz receiver with six PWM outputs, VBat sensing pads, and an IPEX antenna connector.

MATEKSYS ELRS PWM Vario receiver uses a compact 30×18mm board with VBat sensing (25.5V max) and 4–13V DC input pads.

MATEKSYS ExpressLRS 2.4GHz PWM receiver uses a compact board layout with dual antennas and a row of servo-style pin headers for wiring.
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