RadioMaster ER8 8-Channel 2.4 GHz ELRS PWM Receiver

RadioMaster ER8 8-Channel 2.4 GHz ELRS PWM Receiver

Product description

The RadioMaster ER8 is a high-performance 8-channel ExpressLRS 2.4 GHz PWM receiver for RC airplanes, gliders, and other RC models. Thanks to modern ELRS radio technology, dual-antenna reception, and low latency, it offers a reliable radio connection with a long range.

With eight PWM outputs, integrated voltage telemetry, and an additional CRSF interface, the ER8 is particularly well-suited for RC models with multiple servos and advanced control functions.

8 PWM Channels with ExpressLRS 2.4 GHz

The RadioMaster ER8 allows for the direct connection of up to eight servos. The ExpressLRS 2.4 GHz radio protocol ensures fast response times and stable signal transmission. The diversity reception system with two antennas improves reception reliability as the model’s orientation changes.

Integrated Voltage Telemetry

The receiver supports monitoring of the receiver voltage as well as an external flight battery voltage ranging from 4 to 35 V. Automatic voltage detection simplifies setup. The telemetry transmission power can be adjusted via the LUA script up to 100 mW.

Flexible Connections and Easy Configuration

In addition to the eight PWM outputs, the ER8 offers a 4-pin CRSF interface for compatible telemetry sensors. CRSF and SBUS signal outputs are also supported.

Built-in Wi-Fi allows for convenient firmware updates and settings adjustments via the WebUI. The rugged plastic housing protects the electronics and enables installation in a variety of RC models.

Features

• 8-channel PWM receiver with ExpressLRS 2.4 GHz
• Suitable for RC airplanes, gliders, and other RC models
• Diversity reception with two antennas
• Low latency and reliable radio transmission
• Eight PWM outputs for servos
• Integrated receiver voltage telemetry
• External flight battery voltage measurement from 4 to 35 V
• Automatic voltage detection
• Telemetry transmission power up to 100 mW
• CRSF and SBUS signal output
• Additional 4-pin CRSF interface
• Wi-Fi firmware updates and WebUI configuration
• High-quality 2.54-mm servo connectors
• Rugged plastic housing
• Compatible with ExpressLRS 2.4 GHz remote controls

Technical Specifications

General

• Manufacturer: RadioMaster
• Model: ER8
• Part Number: HP0157.RX-ER8
• Product Type: 8-Channel PWM RC Receiver
• Radio Protocol: ExpressLRS 2.4 GHz
• Pre-installed firmware according to the manufacturer: ExpressLRS 3.3.0
• Receiving system: Diversity with two antennas

Channels & Radio Technology

• PWM Outputs: 8
• Frequency band: 2.4 GHz
• Antenna length: 20 cm
• Telemetry transmission power: Max. 100 mW, adjustable via LUA
• Servo connectors: 2.54 mm
• Serial output: CRSF / SBUS
• Expansion connector: 4-pin CRSF
• Wi-Fi / WebUI: Yes

Power Supply & Telemetry

• Operating voltage: 4.5–8.4 V DC
• External voltage measurement: 4–35 V DC
• Receiver voltage telemetry: Yes
• Flight battery voltage telemetry: Yes
• Automatic voltage measurement selection: Yes

Dimensions & Weight

• Dimensions: 43 × 30 × 15 mm
• Weight: 16.5 g
• Antenna length: 20 cm