RadioMaster ER6GV Receiver User Manual

Introduction

The Radiomaster ER6GV receiver is specifically designed for glider pilots requiring a compact and slim receiver. It can drive up to 6 servos and features built-in receiver voltage telemetry and flight battery telemetry with the ability to automatically detect the voltage input source. The ER6GV features a dual-antenna design with telemetry power up to 50mW. Notably, the ER6GV receiver does not include a built-in altimeter, making it suitable for competitions that prohibit the use of vario sensors. The ER6GV can be powered by a 1S LiPo receiver battery.

Physical Description and Specifications

The receiver is compact and lightweight, measuring 42x13x8mm and weighing only 5 grams. It features a 15cm high-sensitivity antenna and supports ExpressLRS 3.3.0 wireless protocol. The device offers 6 PWM output channels. It has a UFL connector and an EXT-V connector for external voltage input, supporting a power supply range of DC 3.5-8.4V. The TX & RX WIFI INFO provides network name (ExpressLRS TX), password (expresslrs), and access URL (http://10.0.0.1/). An optional 3-pin connector can be installed for Channel 6.

Specifications

Firmware

Setup

Follow these steps for initial setup:

Recommended ELRS LUA Settings

On the remote-control end, the recommended ELRS LUA settings are:

⚠️ IMPORTANT: The maximum input voltage for the EXT-V (external voltage input) telemetry reading is 35V. Do not exceed 35V, or the receiver will be damaged.

The EXT-V of the ER6GV is accessed via the EXT-V solder pad on the PCB. A single wire must be soldered to this pad and connected to the positive wire of the battery or ESC. If no EXT-V power source is found, the ER6GV will default to reading the voltage on the receiver pins. Only one voltage input can be used at any given time.

Please ensure that the power supply current of the ESC BEC matches the power consumption requirements of the servo used. If using high-voltage and high-torque servos, it is recommended to use a 2S 7.4V battery for direct power supply or a suitable high-current UBEC.

Calibration of the telemetry voltage will be required on your radio. Navigate to the TELEMETRY page on your radio and locate the RxBt sensor. Edit the SENSOR settings and adjust the offset until the displayed reading matches the actual voltage of the battery in the model. If there is a large difference, adjustment of the ratio may also be required. For best results, calibrate the voltage of your radio using a fully charged battery of the correct cell count intended for use in the model.

Binding Procedures

Binding connects your transmitter to the receiver. Two methods are available:

Passphrase Binding

(Note: Bind phrases are not secret and can be read.)

1. Open the ExpressLRS LUA script on your radio and navigate to the Wifi Connectivity page. Select the "Enable WIFI" option. Connect your radio's Wi-Fi to your mobile phone, tablet, or PC (refer to TX WIFI info). Open the ExpressLRS web page at http://10.0.0.1/ and choose a unique bind phrase. Save and Reboot.
2. Power on the receiver and wait approximately 60 seconds for the LED to blink rapidly, indicating Wi-Fi mode. Connect your phone, tablet, or PC to the receiver's Wi-Fi (refer to RX WIFI info). Open the ExpressLRS web page at http://10.0.0.1/ and enter the matching bind phrase previously entered on your radio. Save and Reboot. Once both the radio and receiver have the same bind phrase set, they will automatically bind.

Traditional Binding

1. The first time you power on your receiver, the LED will perform a quick double blink, indicating the receiver is in bind mode. If this is not the case, hold down the boot button for 10 seconds to reset the receiver.
2. Power on your transmitter/radio and use the [BIND] button on the ExpressLRS Lua script, which sends out a binding pulse.
3. If the receiver has a solid light, it's bound! ✔️

Note: To bind the receiver a second time or to another radio, power cycle the receiver 3 times. On the third power cycle, the LED will double blink, indicating bind mode. If you cannot successfully enter bind mode with the 3 power cycle method, you can hold down the boot button for 10 seconds to reset the receiver to bind mode or use the passphrase method.

WARNING: All previous settings in the receiver will be erased and need to be re-entered when using the reset button.

Channel Usage Notes

• Channel 6 on the receiver must not be used as the power input channel and can only be used as a servo output channel. Power from an ESC or receiver battery must only be applied on Channels 1 to 5.
• ExpressLRS Arming requirements and the use of Channel 5: CH5 is required by ExpressLRS to set the Arm state of the RF module in your radio. It is recommended to assign CH5 to a switch, such as your throttle cut switch, as this provides benefits like dynamic power. Using the ExpressLRS LUA or the Wifi WebUI, you can assign different channels to the CH5 output of your receiver. Please visit https://www.expresslrs.org/ to learn more on the importance of setting up arming.

Telemetry Calibration Details

Detailed telemetry and sensor calibration settings are shown in the diagrams. These include RxBt (receiver battery voltage), Current, Capacity, Battery Percentage, and sensor settings like Type, ID, Source, Unit, Precision, Ratio, and Offset. Users are advised to calibrate these values on their radio for accurate readings.