RADiOMASTER ER8GV ExpressLRS Receiver User Manual

RADiOMASTER ER8GV ExpressLRS Receiver

Product Information:

Thank you for purchasing the Radiomaster ER8GV ExpressLRS receiver. The ER8GV receiver is based on the revolutionary ExpressLRS system. It offers high performance, high reliability, flexible configuration, fast response speed, and ultra-long range. The ER8GV Receiver has a built-in Vario for use in gliders.

Product Usage Instructions:

1. ELRS LUA Settings: The recommended ELRS LUA settings on the remote-control end are:
   • Standard servos: Packet Rate 100Hz Full Telem Ratio Std (1:32) Switch Mode 8ch
   • Performance servos: Packet Rate 333Hz Full Telem Ratio Std (1:128) Switch Mode 8ch
2. EXT-V Telemetry Reading: 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.
3. Voltage Acquisition: The voltage acquisition of the external battery is connected to the positive pole of the battery (welded to the positive pole of the ESC). Please be sure to confirm that the external voltage cannot be connected separately without connecting to the BEC.
4. EXT-V Power Source: The EXT-V (external voltage input) of the ER8GV 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 ER8GV will default to reading the voltage on the receiver pins. Only one voltage input can be used at any given time.
5. Telemetry Voltage Calibration: 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.
6. Channel 6 Usage: Channel 6 on the receiver must not be used as the power input channel and may not be used as a servo output channel. Power from an ESC or Receiver battery must only be applied on Channels 1 to 5.
7. ExpressLRS Arming Requirements and Channel 5 Usage: 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 will provide benefits such as dynamic power. Using the ExpressLRS LUA or the Wifi WebUI, you can assign different channels to the CH5 output of your receiver. See example to the right:

Important:

1. The recommended ELRS LUA settings on the remote-control end are:- Standard servos:

2. – Standard servos:

3. Packet Rate： 100Hz Full

4. Telem Ratio： Std (1:32)（default if unsure）

5. Performance servos:

6. Packet Rate： 333Hz Full

7. Telem Ratio： Std (1:128)

8. Switch Mode： 8ch

9. 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.3: The voltage acquisition of the external battery is connected to the positive pole of the battery (welded to the positive pole of the ESC). Please be sure to confirm that the external voltage cannot be connected separately without connecting to the BEC.

10. The EXT-V (external voltage input) of the ER8GV 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 ER8GV will default to reading the voltage on the receiver pins, only one voltage input can be used at the any given time.

11.  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.

12.  Channel 6 on the receiver must not be used as the power input channel and may out be used as a servo output channel. Power from an ESC or Receiver battery must only be applied on Channels 1 to 5.

13. 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 will provide benefits such as dynamic power. Using the ExpressLRS LUA or the Wifi WebUI, you can assign different channels to the CH5 output of your receiver. See example to the right:
    Please visit https://www.expresslrs.org/ to learn more on the importance of setting up arming.
    The Radiomaster ER8GV receiver has been specially designed for glider pilots who require a compact and slim receiver with a built in vario function. It can drive up to 8 servos and has built-in receiver voltage telemetry and flight battery telemetry with the ability to automatically detect which voltage input to use. The ER8GV features a dual-antenna with telemetry power up to 100mw. The ER8GV can work with a 1S Lipo receiver batteries.

Product Features:

• Power supply: DC 3.5 – 8.4V
• Antenna type: 20cm high sensitivity antenna
• Wireless protocol: ExpressLRS 3.2 pre-installed
• Output channel: 8CH PWM
• Telemetry power: maximum 100mw (LUA Adjustable)
• Built-in high-precision air pressure sensor (Vario)
• External Battery voltage detection range: DC 4.0 – 35V
• Weight: 12 grams
• Dimensions: 6013.513mm

Firmware:

Device Category: Radiomaster 2.4Ghz
Device: ER8G/ER8GV 2400 PWM RX

Binding method (Traditional):

1.  The first time you power on your receiver, the LED will double blink. This indicates that 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. Open the ExpressLRS LUA on your remote controller and select [BIND], then confirm.
3. A successful bind is indicated by the light being a steady on, indicating that frequency binding was successful.

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 below.
WARNING: All previous settings in the receiver will be erased and need to be set again when using the reset button.

Binding method (Passphrase).

1. Open the ExpressLRS LUA and navigate to the Wifi Connectivity page. Select the Enable Wifi option and connect to your radios wifi with a mobile phone, tablet or PC (See TX Wifi notes below). Open the WebUI (Express LRS web page on http://10.0.0.1/) and choose a unique bind phrase. Note Bind phrases are not secret and can be read. Save and Reboot.
2.  Power up the receiver and wait 60 seconds for the LED to blink rapidly to indicate Wifi mode. Connect your phone, tablet or PC to the receivers Wifi (See TX Wifi notes below). Open the WebUI (Express LRS web page on http://10.0.0.1/) and enter the matching bind phrase previously entered on your radio. Note Bind phrases are not secret and can be read. Save and Reboot. Once a radio and a receiver have the same bind phrase set they will automatically bind.

TX Wifi notes：
WiFi default network name: ExpressLRS TX WiFi default password: expresslrs
Default URL: http://10.0.0.1/(Open in browser)

RX Wifi notes:
WiFi default network name: ExpressLRS RX WiFi default password: expresslrs
Default URL: http://10.0.0.1/ (Open in browser)

References

• High Performance Open Source Radio Control Link - ExpressLRS

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