RadioMaster ER8 8-channel 2.4GHz ELRS PWM receiver

Product Description

The RadioMaster ER8 is a powerful 8-channel ExpressLRS 2.4GHz 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 suitable for RC models with multiple servos and extended control functions.

8 PWM channels with ExpressLRS 2.4GHz

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

Integrated voltage telemetry

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

Flexible connections and easy configuration

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

Firmware updates and settings can be conveniently performed via the web interface using integrated Wi-Fi. The robust plastic housing protects the electronics and allows for installation in various RC models.

Features

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

Technical Data

General

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• Manufacturer: RadioMaster
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• Model: ER8
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• Article number: HP0157.RX-ER8
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• Product type: 8-channel PWM RC receiver
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• Radio protocol: ExpressLRS 2.4GHz
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• Pre-installed firmware according to the manufacturer: ExpressLRS 3.3.0
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• Reception system: Diversity with two antennas

Channels & Radio Technology

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

Power Supply & Telemetry

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

Dimensions & Weight

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

Scope of Delivery

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• (1×) RadioMaster ER8 2.4GHz ELRS PWM Receiver
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• (1×) Voltage telemetry cable (Type B)
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• (1×) CRSF cable
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• (1×) ELRS RX SBUS cable
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• (1×) User card