---
title: "User Manual – ASTER II Bluetooth® EXPERT for V2 GB [AEG & HPA]"
canonical: "https://help.gatee.eu/space/GHC/3145891841/User%20Manual%20%E2%80%93%20ASTER%20II%20Bluetooth%C2%AE%20EXPERT%20for%20V2%20GB%20%5BAEG%20%26%20HPA%5D"
format: markdown
---
> Macro (toc)
# General Information
Congratulations on the purchase of the new ASTER II Bluetooth® V2 gearbox drop-in ETU mosfet AEG – the younger brother of the famous TITAN II Bluetooth®! ASTER II Bluetooth® will transform your AEG replica into an advanced training equipment of the future. Don't compromise – benefit from the years of experience of hundreds of thousands of users around the world, proving that ASTER II Bluetooth® is the best choice. The built-in Bluetooth® 5.2 provides convenient access to ASTER II Bluetooth® settings, replica telemetry and the ability to use smartwatches, STATUS and other future parts of the GATE ecosystem.
> ℹ️ The information contained in this document is subject to change without notice.
> ℹ️ Read carefully before use the whole manual. Keep for future reference.
> ℹ️ Failing to read this information may void the guarantee!
> ℹ️ When using the product, always follow basic safety rules to reduce the risk of injury from fire or electrical shock.
# Device Structure
1. Printed Circuit Board (PCB)
2. Circuit power wires with DEANS-T connector
3. Motor power wire minus "-"
4. Motor power wire plus "+"
5. Sector gear position sensors
6. Trigger sensor
7. Fire selector sensor
8. Multifunctional Port solder fields
## Kit Contents
- ASTER II Bluetooth®
- Gearbox stickers
- Selector plate stickers
- Installation Kit
- QuickStart Guide
- Quantum Trigger 2
# Safety Summary
Please read this to ensure safe and correct use. Retain this information for future reference. The information contained in this document is subject to update without notice.
For your safety, this product should be installed by a skilled person.
> ❌ **Warning **
> ❌ Situations that may cause injury to yourself or others.
> ⚠️ **Caution **
> ⚠️ Situations that may cause damage to your device or other equipment.
> ✅ **Note**
> ✅ Notes, usage tips or additional information.
> ❌ **Warning**
> ❌ This device is not a toy and may not be operated by people (including children) with limited physical or mental abilities, as well as by people with no earlier experience in operation of electronic equipment. They may use the device only under the supervision of people responsible for their safety.
> ❌ **Warning **
> ❌ Before starting the installation process, make sure that your AEG magazine is empty and there are no BBs inside.
> ❌ **Warning**
> ❌ This equipment is not suitable for use in locations where children are likely to be present.
> ❌ **Warning**
> ❌ Persons under 18 years of age ought not stay unattended near the device during the installation or servicing of a device installed in an ASG replica.
> ❌ **Warning**
> ❌ Persons under 18 years of age ought not stay unattended near the device installed in an ASG replica ready for use.
> ❌ **Warning**
> ❌ Persons under 18 years of age are not allowed to install or commission the device in an ASG replica.
> ❌ **Warning**
> ❌ Persons under 18 years of age are not allowed to service this device.
> ❌ **Warning**
> ❌ Do not store or carry flammable liquids, gases or explosive materials in the same compartment as the device, its parts or accessories.
> ❌ **Warning **
> ❌ Take caution to prevent short-circuiting the battery as the consequences may be very dangerous to the health of the user.
> ❌ **Warning **
> ❌ Excessive trigger sensitivity may cause unintentional discharge (firing).
> ❌ **Warning **
> ❌ When an airsoft replica is not in use, its battery must be disconnected and the hop-up chamber must be empty.
> ❌ **Warning **
> ❌ While handling an AEG replica with a connected battery, anyone within the range of the replica must wear personal protective equipment.
> ❌ **Warning**
> ❌ When not in SAFE mode, avoid using the device around strong electromagnetic fields, such as PMR transmitters exceeding European standards or when electrostatic discharges, e.g. lightning, occur in the atmosphere, which may cause malfunction of the device and unintentional discharge (firing).
> ❌ **Warning**
> ❌ When an airsoft gun is not in use, its magazine must be detached or kept empty with no BBs inside.
> ❌ **Warning **
> ❌ Incorrectly connecting positive and negative battery terminals will cause immediate damage to the device, which is not covered by warranty, and can lead to fire.
> ❌ **Warning**
> ❌ Pay attention to correctly connect positive and negative wires to the battery. Make sure you are connecting the positive terminal of the battery to the red wire of the device, and the negative terminal of the battery is connected to the black wire of the device. Incorrect power polarity may result in damage to the device and could even lead to fire or battery explosion.
> ⚠️ **Caution**
> ⚠️ Do not remove the device protective film or heat shrink tubes. Removing them will void the warranty.
> ⚠️ **Caution**
> ⚠️ For your own safety you ought to use an additional fuse between the battery and the device.
> ⚠️ **Caution**
> ⚠️ When operating under unusual conditions, perform maintenance outlined below for the climate similar to your area. Operating in extremely cold temperatures is not recommended. Do not expose ASTER II Bluetooth® to direct sunlight for long periods of time. Keep away from dust or sand, which can cause malfunctions and/or excessive wear. Keep ASTER II Bluetooth® out of snow, rain, and water. This will prevent electrical failure and fluid buildup inside the gearbox.
> ✅ **Note**
> ✅ The product Warranty Form is available here:[ http://www.gatee.eu/warranty](http://www.gatee.eu/warranty).
> ✅ **Note**
> ✅ Bluetooth 4.0 or higher is required to connect to ASTER II Bluetooth® with a smartphone or other device.
# Installation
## Introductory information
> ⚠️ **Caution**
> ⚠️ Regardless of your previous experience, follow all safety precautions to prevent any damage to your ASTER II Bluetooth®.
> ⚠️ **Caution**
> ⚠️ ASTER II Bluetooth® installation requires deep technical knowledge of gearbox internals. To avoid damage, we recommend it to be installed by a skilled person. If, however, you wish to proceed with ASTER II Bluetooth® installation on your own, you must read this full-length document and watch the installation video beforehand. Incorrect installation may result in, among others, sensor damage, which is not covered by warranty.
> ⚠️ **Caution**
> ⚠️ The optoelectronic components of ASTER II Bluetooth® marked in the photo below are very delicate. Protect them against damage.
> ⚠️ **Caution**
> ⚠️ Do not remove the device protective film or heat shrink tubes. Removing them will void the warranty.
> ⚠️ **Caution**
> ⚠️ We recommend using an insulation washer when tightening the PCB to the gearbox. When tightening the PCB, follow the order of the washers according to the graphic below.
> ⚠️ **Caution**
> ⚠️ Incorrect placement of wiring under the motor gear may cause insulation damage and a short circuit, which is not covered by warranty.
> ⚠️ **Caution**
> ⚠️ In ASTER II Bluetooth® connectors must be bent according to the photo below. Bending connectors in the opposite direction may cause them to break. If this should happen, spare terminals are included in the INSTALLATION KIT.
> ⚠️ **Caution**
> ⚠️ Do not pull the trigger when the gearbox is open. This may result in trigger sensor damage.
> ⚠️ **Caution**
> ⚠️ For triggers that have adjustable pivot, first adjust the range of trigger movement using the screws, only then calibrate the trigger. With ASTER II Bluetooth®, we recommend using the Quantum Trigger 2 adjustable trigger.
> ✅ **Note**
> ✅ The selector sensor does not detect black surface. If the selector plate does not come with a metal connector or is not working correctly, you must use an appropriate sticker from the INSTALLATION KIT.
> ✅ **Note**
> ✅ Sticker position is crucial. Make sure to align the sticker exactly **to the left edge and the top red line**. The INSTALLATION KIT contains 3 different sticker types. First, use the one with the thinner black line. If you are not able to calibrate the selector, try the other ones.
> ✅ **Note**
> ✅ If using a standard trigger, stick the gearbox sticker as shown in the photo below. This will allow ASTER II Bluetooth® to detect the movement of the trigger. If you want to use the Quantum Trigger, do not use the gearbox sticker.
## Quantum Trigger
> ✅ **Note**
> ✅ Quantum Trigger is compatible only with ASTER V2 & ASTER II Bluetooth®.
> ✅ **Note**
> ✅ While replacing your old trigger with a Quantum Trigger, use the same trigger spring.
> ⚠️ **Caution**
> ⚠️ Do not remove the white sticker from your Quantum Trigger.
> ⚠️ **Caution**
> ⚠️ While installing a Quantum Trigger, do not place the gearbox sticker inside. If you have a white sticker on the gearbox, please remove it.
> ✅ **Note**
> ✅ In case you have any difficulties while installing or using this product:
> ✅
> ✅ - contact us via [https://help.gatee.eu](https://help.gatee.eu/)
> ✅ - send us an e-mail: [support@gatee.eu](mailto:support@gatee.eu)
> ✅ - join [GATE Airsoft Community Discord Server](http://discord.gatee.eu/)
## Installation of the unit in the gearbox
### INSTALLATION KIT Contents
- selector plate sticker set (6 pcs)
- gearbox sticker set (2 pcs)
- M2 screw and washer set:
- 1 x insulation washer (nylon or pressboard)
- 3 x steel zinc screw
- M2.5 screw and washer set:
- 1 x screw
- 1 x pressboard insulation washer
- 1 x steel washer
- connector set:
- 1 x Deans-T connector with heatshrink tubes
- 2 x motor connectors (2.8 x 0.5 mm – 0.11 x 0.02 in) with heatshrink tubes
### Tools and Materials Needed
- a cross-head screwdriver
- a flat-blade screwdriver
- a metal file or milling machine
- solvent
- grease
- device with the GCS app installed
### Installation procedure
Follow the steps below in order to mount the ASTER II Bluetooth® drop-in module:
1. Remove the gearbox from the AEG body
2. Disassemble your gearbox and take out all the internals
3. Clean the gearbox case using solvent
4. Pay attention to the marked area. If you see that it is not smooth, use a metal file or grindstone to prepare the surface. The gearbox surface should be smooth, with no sharp edges which may damage ASTER II Bluetooth®.
> ⚠️ **Caution**
> ⚠️ If the PCB does not perfectly fit in your shell, make the necessary modifications to the gearbox shell, **not to the PCB**.
> ⚠️ It is forbidden to make any modifications to the PCB shell such as drilling the screw hole, grinding the edges of the PCB, etc. Doing so may result in immediate damage to the circuit, which is not covered by the warranty.
5. Place the ASTER II Bluetooth® board in the bottom part of the gearbox. Do not use a screw yet. Check if the board is laid flat in the gearbox.
6. Make sure that the electronic components found on the side of the fire selector board do not touch the gearbox case.
7. Use the (milky white or black) insulation washer from the INSTALLATION KIT.
> ⚠️ **Caution**
> ⚠️ The insulation washer protects the circuit PCB from mechanical damage, which does not affect the functioning of the unit, only its aesthetics. Damage to the soldermask in the marked area cannot cause a short circuit and damage to ASTER II Bluetooth®. However, we recommend the use of insulation washers if possible.
8. Fasten the board to the shell. Use the original screw or the one(s) from the INSTALLATION KIT.
9. Check if the screw is sticking out of the gearbox.
10. If so, add the metal washer(s) included in the kit. Make sure that the metal washer is placed between the screw and the insulation washer. If you can't shim any more, you can use a shorter screw or shorten this one.
11. Loosen the screw. Adjust the position of the ASTER II Bluetooth® unit board. The distance between the PCB and the bearing must be the same throughout (as indicated in the marked area).
12. Make sure the marked areas are not covered by the board or wires.
13. Check if the sensors are clean and not covered by wires.
14. Check wire placement in relation to trigger sensors:
> ⚠️ **Caution**
> ⚠️ For ASTER II Bluetooth® with REAR wiring, the **minimum **distance for wire location from the edge of the trigger sensors must be the following:
> ⚠️
> ⚠️ - 2.5 mm from the marked edge of the left hand sensor (1)
> ⚠️ - 5 mm from the marked edge of the right hand sensor (2)
> ⚠️ **Caution**
> ⚠️ For ASTER II Bluetooth® with FRONT wiring, the **minimum **distance for wire location from the edge of the trigger sensors must be the following:
> ⚠️
> ⚠️ - 2.5 mm from the marked edge of the left hand sensor (1)
> ⚠️ - 2 mm from the marked edge of the right hand sensor (2)
15. Some gearboxes need modification. Check if your gearbox has the marked pins. If so, remove them.
16. Check if both parts of the gearbox fit together perfectly.
17. Mount the trigger without the spring. Do not pull the trigger when the gearbox is open. Close the gearbox. When the gearbox is closed, carefully check if the trigger can move smoothly and is not touching any ASTER II Bluetooth® components.
18. Mount the sector gear, the trigger with the spring. Make sure that the gear is not touching ASTER II Bluetooth®.
> ✅ **Note**
> ✅ The placement of the sector gear sensor is very important. Make sure that the gear cam sensor detects the cam correctly.
19. Close the gearbox. Tighten the two screws on the top part of the gearbox case.
20. Prepare the selector plate. If the selector plate does not have a copper connector, you need to modify it. The black surface does not reflect light, so sensors will not work properly.
21. In order to modify the black plate, use a sticker from the INSTALLATION KIT. Try the sticker with the thinner black line first.
> ✅ **Note**
> ✅ If the selector plate has a copper connector, do not make any modifications.
22. The black plate after modification. Sticker location is crucial. Carefully align it to the left-hand side.
> ✅ **Note**
> ✅ Sticker position is crucial. Make sure to align the sticker exactly **to the left edge and the top red line**. The INSTALLATION KIT contains 3 different sticker types. First, use the one with the thinner black line. If you are not able to calibrate the selector, try the other ones.
23. Install the selector plate.
### Sensor Diagnostic Mode
> ✅ **Note**
> ✅ In order to activate the sensor diagnostics mode, ASTER II Bluetooth® must be in **factory preset state** (no trigger and selector calibration). Otherwise, you must **restore factory settings** via GCS or via trigger.
> ✅ **Note**
> ✅ The ASTER II Bluetooth® **does not have **an RGB LED. Sensor diagnostic communication is conveyed via **engine vibration**. Connect the unit to the motor before connecting the battery.
> ⚠️ **Caution**
> ⚠️ Secure the motor in such a way that it does not cause damage to the user's body or health. You can leave it in the motor grip or if you have a vise or carpenter's clamp, you can fasten it to your table.
> ⚠️ **Caution**
> ⚠️ In order for the test to be carried out correctly, it is necessary that it is performed on the target correctly installed parts:
> ⚠️
> ⚠️ - shimmed gears – for the purpose of the test, a sector gear is sufficient
> ⚠️ - target screw-adjusted trigger – if adjustable
> ⚠️ - target selector plate with a white sticker in place.
> ⚠️
> ⚠️ **Failure to comply with the above points may result in passing the diagnostic test, however, the system may malfunction in the assembled replica!**
The first step in installing **ASTER II Bluetooth®** is verifying that the sensors correctly detect the sector gear, trigger and fire selector. Sensor diagnostic mode is available in **ASTER II Bluetooth® firmware versions v0.2-01 or later**. It allows you to detect sensor malfunctions even before the **gearbox **is completely assembled.
**Prepare:**
- gearbox skeleton
- ASTER II Bluetooth® including the mounting screw
- sector gear
- trigger together with the spring
- selector plate
- 2 screws to assemble the gearbox skeleton
- battery
- motor
**Installation procedure:**
1. Install the **ASTER II Bluetooth®**, **sector gear** and **trigger **in the **gearbox shell**
2. Screw the **gearbox shell** together with at least two screws
3. Install the **selector plate**
4. **Secure motor**, e.g. with a carpenter's clamp
5. Connect the **ASTER II Bluetooth®** to the **motor**
> ℹ️ **Sensor diagnostic test run: **
> ℹ️
> ℹ️ 1. Connect the motor to ASTER II Bluetooth®. **The motor must be secured**, e.g. with a **clamp**.
> ℹ️ 2. **Connect the power supply** to **ASTER II Bluetooth®** and make sure that the system **is not calibrated**. If the system is calibrated,** restore factory settings**.
> ℹ️ 3. Within **5 seconds **of connecting the power supply, make **a full rotation of the sector gear**. If the unit detects a change on the sensor of the gear, you will hear a **high **tone vibration (1kHz).
> ℹ️ 4. Detection of gear rotation **starts the diagnostic test**. You can proceed to test the remaining sensors.
> ℹ️ 5. Pull the trigger several times **in its full range of its movement**. Each time you pull it in, you should hear a **mid-tone** vibration (800Hz), which indicates that the trigger sensor is working properly.
> ℹ️ 6. Move the selector plate **in its full range of its movement**. Each time you move it in, you should hear a low-tone (500Hz) vibration, which indicates that the trigger sensor is working properly.
> ℹ️ 7. After checking all sensors, **disconnect the power supply**. Disconnecting the power supply means exiting the **Sensor Diagnostic Mode**.
> ✅ **Note**
> ✅ The **gear sensor test** must be performed **first**. Gear movement starts the **sensor diagnostic test**.
> ✅ **Note**
> ✅ Once the **sensor diagnostic test** is started, the sensors can be tested **any number of times** and **in any order**.
> ✅ **Note**
> ✅ **Each** detected change on the **cam**, **trigger** or **selector** sensors triggers a separate vibration.
> ✅ **Note**
> ✅ To exit the **diagnostic mode**, **disconnect the battery**.
> ✅ **Note**
> ✅ In the sensor diagnostic mode, the system can be connected to the GCS application. Calibration of the trigger or selector with the GCS application exits the sensor diagnostic mode.
> ⚠️ **Caution**
> ⚠️ If vibration is not activated during the test of any of the sensors, this means that the relevant sensor is not working properly.
> ⚠️ **Caution**
> ⚠️ If, within **5 seconds** of connecting the battery, the **gear sensor does not detect a change** (cam-break), a vibration will be started, indicating that the selector and trigger are not calibrated. The system will resume **normal operation**. To perform the diagnostic test again, it is necessary to disconnect and reconnect the battery.
**Example of a successfully completed test after the installation procedure:**
1. Connect the battery
2. Turn the gear so that it makes several turns – **high **tone vibration (1kHz)
3. Pull the trigger several times in its full range of movement – **medium **tone vibration (800Hz)
4. Move the selector plate in its full range of movement – **low **tone vibration (500Hz)
5. You can now proceed with the rest of the installation
> ✅ **Note**
> ✅ An alternative to this sensor test is connecting the ETU to the GCS and reading the sensors.
## Calibration and Sensor Performance Test Using the GCS App
Connect ASTER II Bluetooth® to your device:
1. Download and install the GCS app on your device [https://www.gatee.eu/gcs](https://www.gatee.eu/gcs)
2. Start **Bluetooth®** communication on your device
3. Connect the battery to ASTER II Bluetooth®
4. Launch the GCS app and confirm all the required approvals
5. Tap "**+**" on the **Dashboard **of the app
6. In the list of devices, locate your ASTER II Bluetooth® – if it is not found, drag the screen down to refresh or tap **Refresh Scan**
7. Enter the **PIN **code found on the included stickers
8. Update the ASTER II Bluetooth® firmware
9. It is recommended to restore the factory settings after each firmware update
10. Choose the type of replica you want to use – **AEG** or **HPA**
25. Check gear tooth detection by the unit sensors: Go to **General**.
Rotate the gears slowly. Keep in mind that ASTER II Bluetooth® reads the sensors much quicker than GCS.
26. Check trigger sensitivity:
In GCS, go to the **Trigger **tab. Perform the first trigger calibration.
Slowly pull the trigger. The sensor indicator should move with the extent to which the trigger is pulled.
27. Check fire selector sensor calibration:
In GCS, go to the **Selector **tab. Perform the first calibration of the selector sensor.
Move the selector plate to see if ASTER II Bluetooth® detects SAFE, SEMI and AUTO. You will notice changes in the marked areas.
If the sensor does not function correctly, you need to modify the selector plate with another sticker as mentioned above in steps 20-21 and shown below:
28. If all the sensors are working flawlessy, you can assemble the gearbox. Do not use too much grease. In a critical situation, excessive grease may cover sensors.
> ⚠️ **Caution**
> ⚠️ After assembling the entire replica, recalibrate the trigger and selector sensors.
> ✅ **Note **
> ✅ The first few shots are calibration shots. ASTER II Bluetooth® adjusts to the gearbox configuration. To readjust the ASTER II Bluetooth®, you must restore factory settings. This is necessary if, for example, you are replacing the motor.
## Trigger and Selector Auto-Calibration
Trigger and Selector Auto-Calibration is available starting from the following firmware version:
- ASTER II BT V2 - **0.3-02**
> ⚠️ **Sensor auto-calibration is only possible when the trigger or selector in the replica is uncalibrated and the replica is equipped with a 3-position selector.**
Trigger and selector auto-calibration allows the replica to be used without the need for prior sensor calibration via the GCS app or the trigger.
> ℹ️ The user does not need to perform any special actions – it is enough to switch the selector through all three positions and press the trigger several times during normal use. The selector calibration process will be completed once the ETU detects all three selector positions.
> 📝 **To calibrate the trigger, simply press it fully and release it smoothly, just like during normal shooting.**
> ℹ️ After pressing the trigger, the replica will begin firing in the mode corresponding to the selected selector position.
> ✅ Please note that the first few shots and the initial detection of the fire selector position may be slightly inaccurate. This is **an expected part of** the system’s auto-calibration process. After a few firing cycles and several selector changes, the system will self-adjust and begin to operate flawlessly.
Performing trigger and selector auto-calibration does not exclude the possibility of calibrating the sensors via the GCS app. The user can recalibrate the sensors at any time by connecting to GCS or restoring the ETU to factory settings.
## Calibration via Trigger and Selector
> ℹ️ **Note**
> ℹ️
> ℹ️ **Manual calibration using the trigger and selector is no longer supported as of firmware version 0.2 beta 01.**
> ℹ️ Instead, starting from firmware version 0.3-02, a more user-friendly **Auto-Calibration** feature has been introduced.
> ✅ **Note**
> ✅ During calibration, remember to pull the trigger completely each time (until you feel resistance).
1. If your ASTER II Bluetooth® is brand new, go to step 2. If not, restore factory settings as described in **Restoring Factory Settings **below and then go to step 2.
2. To calibrate ASTER II Bluetooth®, plug in the battery. You will hear 3 low frequency vibrations indicating lack of calibration error.
3. Switch the selector to AUTO.
4. Pull the trigger twice and wait for a confirmation vibration.
5. Then, switch the selector to SEMI.
6. Pull the trigger once and wait for a confirmation vibration.
7. Switch the selector to SAFE.
8. Wait for a confirmation vibration. Now ASTER II Bluetooth® is fully calibrated and ready to use.*
*If there is a problem during calibration, you will hear a short high and mid frequency vibration. Then, you should disconnect, reconnect the battery, and repeat the calibration using the trigger and selector.
## Installation of Accessories
### Connecting accessories that do not require power
#### General information
To connect an **external trigger** or **fire selector** to the **ASTER II Bluetooth®**, solder the wires to the dedicated solder pads on the PCB. On the other end of the wires, install a momentary NO (Normally Open) switch, for example.
An external sensor, such as a momentary NO button, can take on the role of the standard trigger in the replica. For instance, pressing the button can simulate pulling the trigger, and releasing it can simulate releasing the trigger.
To connect an **external trigger** or **fire selector** to the **ASTER II Bluetooth®**, you should use:
- a prepared cable -* **[universal multifunctional cable for max. 2 DIY accessories](https://gatee.eu/products/universal-i-o-cable-for-max-2-diy-accessories-bolt-catch-magazine-sensor-for-titan-ii?_pos=1&_sid=b03644a0e&_ss=r)*
The external switch can function as:
- trigger
- fire selector
- magazine sensor
- bolt catch
> ℹ️ **ASTER II Bluetooth® for V2** can support:
> ℹ️
> ℹ️ - two external sensors (by connecting two independent switches)
> ℹ️ Each sensor signal can only support one device:
> ℹ️
> ℹ️ - Sensor signal I – one device (e.g., external trigger)
> ℹ️ - Sensor signal II – one device (e.g., external fire selector)
> ℹ️ Possible settings to choose from:
> ℹ️
> ℹ️ - Sensor signal I:
> ℹ️ - Trigger
> ℹ️ - Selector
> ℹ️ - Bolt catch
> ℹ️ - Sensor signal II:
> ℹ️ - Trigger
> ℹ️ - Selector
> ℹ️ - Magazine
> ℹ️ The **blue wire** is responsible for **sensor signal I** – to use the **bolt catch**, it must be soldered to the **blue wire**.
> ℹ️
> ℹ️ The **gray wire** is responsible for **sensor signal II** – to use the **magazine sensor**, it must be soldered to the **gray wire**.
> ⚠️ **Caution**
> ⚠️ In the **GCS app**, only two external sensors can be set at the same time.
#### Installation in the gearbox using the example of an external trigger and fire selector
To connect an external trigger or fire selector to the ASTER II Bluetooth®:
1. Open the gearbox and remove the ASTER II Bluetooth®.
2. Prepare the wires for soldering the switches.
3. Solder the switch according to the following diagrams:
1. **fire selector only or trigger only**
2. **trigger and fire selector**
4. Place the ASTER II Bluetooth® on a flat and clean surface (THE BATTERY MUST BE DISCONNECTED).
5. Stabilize the unit to prevent movement during soldering.
6. Solder the other end of your accessory wires, paying close attention to the order of the cables and the angle at which they are routed.
> ℹ️ Order of the cables:
> ℹ️
> ℹ️ - black – **COM**
> ℹ️ - blue – **IN1**
> ℹ️ - gray – **IN2**
The wires should be soldered as shown in the image below, as this will help ensure the correct routing of the wires.
It is important that after soldering, there is no possibility of a short circuit between the pads. Otherwise, this may lead to improper functioning of the device.
7. After soldering, secure the soldered connections with PCB protective lacquer or, if unavailable, with insulating tape.
> ⚠️ **Caution**
> ⚠️ Pay special attention to avoid splashing optical sensors during coating.
8. Install the ASTER II Bluetooth® in the gearbox and route the wires as shown in the image.
9. Configure the accessory in the GCS app. Check if the accessory works correctly.
1. Configuring the trigger:
1. Go to the **General** tab and select **Multifunction Port**.
2. Tap **Sensor signal I** or **Sensor signal II** and choose **Trigger**.
3. Save the settings.
4. Check the functionality of the switch.
2. Configuring the fire selector
1. Go to the **General** tab and select **Multifunction Port**.
2. Tap **Sensor signal I** or **Sensor signal II** and choose **Selector.**
3. Save the settings.
4. Check the functionality of the switch.
3. Configuring the fire selector and trigger
1. Go to the **General** tab and select **Multifunction Port**.
2. Tap **Sensor signal I** and choose **Trigger**.
3. Tap **Sensor signal II** and choose **Selector. **
4. Save the settings.
5. Check the functionality of the switch.
6. If the switches work in the reverse order, swap the settings of **Sensor signal I** and **Sensor signal II.**
10. Close the gearbox shell and ensure that the sensor wires are not pinched. Pinching the wires will cause permanent damage to the accessory.
11. Route the wires to the location where you plan to mount the accessories.
12. Mount the accessories in their designated locations.
> ℹ️ Activating the trigger sensor on the Multifunction Port **disables **the operation of the trigger sensor located on the PCB of the ASTER II Bluetooth®.
> ℹ️ Activating the selector sensor on the Multifunction Port **disables **the operation of the selector sensors located on the PCB of the ASTER II Bluetooth®.
> ⚠️ **Caution**
> ⚠️ In the **GCS app**, only two external sensors can be set at the same time.
### Bolt-Catch & Magazine Sensor Set
> ✅ **Note **
> ✅ The magazine and bolt-catch sensor for the ASTER II Bluetooth® V2 gearbox drop-in ETU mosfet AEG is a separate accessory that is not included.
To connect the magazine and bolt-catch sensor to ASTER II Bluetooth® you will need to solder wires to the solder fields provided on the PCB.
> ⚠️ **Caution**
> ⚠️ In order to connect this accessory, you will need a soldering iron (1.5 mm soldering tip) and basic skills in wire soldering. If you do not have the necessary equipment and experience, we recommend that you outsource this activity to a specialist (ASG replica service/GMS service). Improperly carried out soldering process can lead to permanent damage to the circuit, and this will void the warranty.
1. Place ASTER II Bluetooth® on a level and clean surface (BATTERY MUST BE DISCONNECTED). You can place a heavier object (such as a book) on the circuit to stabilize it while soldering.
2. Solder the wires of the magazine sensor and bolt-catch, paying special attention to the order of the wires (blue– **IN1**, gray – **IN2**, black – **COM**) and the angle of soldering (marked in the photo below) to the fields, which will make it easier to position the wires correctly. It is important that once soldering is done, there is no possibility of a short circuit between the fields. Otherwise this can lead to malfunction of the device.
3. Stabilize the ASTER to prevent it from moving during soldering.
> ⚠️ **Caution**
> ⚠️ When soldering cables, do not touch the circuit with a soldering iron for more than three seconds, as this may damage the product.
> ❌ **Caution**
> ❌ **Ensure that no potential short circuits exist between solder pads after soldering, as this may lead to device malfunction or failure.**
4. After soldering, secure the soldered connections with PCB protective lacquer or, if unavailable, with insulating tape.
5. Screw the ASTER II Bluetooth® to the gearbox shell according to the guidelines in the manual. Route the magazine sensor and bolt-catch wires to the outside of the gearbox as shown in the photo below - as close to the gearbox wall as possible. Make sure that the wires do not obstruct the trigger sensor marked below.
6. Carefully close the gearbox case, ensuring that the sensor cables are not pinched or compressed. Damage to the cables may result in permanent malfunction of the accessory.
7. Remove the protective film from the bolt-catch button plate taking care not to damage the adhesive layer.
7. Degrease the bolt-catch lever and glue the button to it where it is shown in the following photo.
> ✅ **Note**
> ✅ You can install the magazine sensor in two ways:
> ✅
> ✅ - using an M3 screw – in EON and Retro Arms shells
> ✅ - using adhesive film
8. When mounting with a screw, pay attention to the parallel alignment of the magazine sensor plate with respect to the bottom edge of the gearbox. The screw should be screwed with a moderate torque that will not allow the sensor plate to rotate (over-tightening can damage the sensor) and secured with thread glue.
> ✅ **Note **
> ✅ If your shell does not have a threaded opening at this point, you can either make one based on the dimensions below or use glue film.
9. If installing with an adhesive film, first apply it to a degreased (preferably with isopropyl alcohol) magazine sensor taking care not to damage the adhesive layer.
10. Degrease the gearbox in the gluing area, peel off the second protective layer from the adhesive film and glue the magazine sensor in the place shown in the following photo. **Align the plate to the bottom of the gearbox.**
### Magazine Compatibility
The magazines must press the lever shown in the picture. For the accessory to function correctly, the bottom edge of the accessory must be level with the top edge of the magazine.
The magazine sensor only supports magazines with a full flat top surface. Magazines with longer side panels may not work properly. If you have such magazines, we suggest a solution to ensure compatibility with the sensor. Place a 2 mm shim on the lower surface of the magazine, enabling the sensor to work properly. You can cut the shim yourself – the best dimensions are 20 x 5 x 2 mm. Stick it where shown in the photo below.
### Multifunctional Port Activation in GCS
1. Download and install the GCS app on your device [https://www.gatee.eu/gcs](https://www.gatee.eu/gcs)
2. Start **Bluetooth**® communication on your device
3. Connect the battery to ASTER II Bluetooth®
4. Launch the GCS app and confirm all the required approvals
5. Tap "**+**" on the **Dashboard **of the app
6. In the list of devices, locate your ASTER II Bluetooth® – if it is not found, drag the screen down to refresh or tap **Refresh Scan**
7. Enter the **PIN **code found on the included stickers
8. Update the ASTER II Bluetooth® firmware
9. Go to the **General **tab and select **Multifunctional Port**
10. Tap **Sensor Signal I** and select **Bolt-Catch** if you want to use the bolt-catch button.
11. Tap **Sensor Signal II** and select **Magazine **if you want to use the magazine sensor.
12. Turn on **Magazine Mode Simulation** in the **Magazine **tab and set the appropriate magazine capacity.
# Quick Access Menu
## Pre-Cocking
You can access **Pre-Cocking **using a shortcut without connecting the unit to the GCS app. In GCS, go to **Trigger>Pre-Cocking>Switch Mode via Selector** and use the toggle button to activate this function.
1. Fire a shot on SEMI, BURST or pull the trigger while in SAFE mode (only if the safety lever has been removed) **and** **do not release the trigger**.
2. Switch the selector within 2 s. There is a single low frequency vibration.
3. Switch the selector in any order to change between the options indicated by vibrations:
1. 1 low vibration – Pre-Cocking Off
2. 2 low vibrations – Pre-Cocking Auto
3. 3 low vibrations – Pre-Cocking Manual
4. Release the trigger to save the selected mode.
| | |
| --- | --- |
| Available options for **Pre-Cocking** | Low frequency vibrations |
| Off | 1 |
| Auto | 2 |
| Manual* | 3 |
By releasing the trigger, you exit the function confirming it.
*If defined in GCS
## Forcing Piston Release after Firing with Pre-Cocking Enabled
1. Press the trigger in SEMI or BINARY mode and wait for the firing cycle to end – do not release the trigger.
2. After 1.5 s, a high, medium, high, medium, high, medium frequency audible message will be triggered.
3. Releasing the trigger after the sound message is equivalent to firing without Pre-Cocking. The piston remains in the rest position.
> ✅ **Note**
> ✅ Releasing the piston to the rest position does not mean that Pre-Cocking mode is deactivated. Each subsequent shot after pressing the trigger will be made with the piston cocked according to the selected Pre-Cocking mode.
## Alternative SAFE mode
If the user has configured the selector so that SAFE mode is not assigned to any selector position, the user can activate SAFE mode at any time by doing the following:
1. Set the selector lever to SAFE
2. Change the selector position to SEMI
3. Return to SAFE position again.
> ⚠️ **Caution**
> ⚠️ Note that the above sequence must be performed within 0.5 s. Activation of SAFE mode will be confirmed by a short low tone vibration. The SAFE mode is deactivated when the fire selector position is changed.
# Restoring Factory Settings in the GCS App
> ✅ **Note**
> ✅ Restoring the factory settings results in resetting the default settings, erasing adaptations, calibration of the trigger sensor and fire selector as well as statistical data.
Factory settings can be restored when the ASTER II Bluetooth® is connected to the GCS app. Follow the steps below:
1. Launch the GCS app and connect the selected ASTER II Bluetooth® device to it.
2. Go to the **General **tab.
3. Open the menu in the upper right corner and select **Restore factory settings**.
# Restoring Factory Settings without the GCS App
1. Disconnect the battery
2. Pull and do not release the trigger
3. While the trigger is pulled, connect the battery (ignore the warning vibration)
4. Hold the trigger for 10 seconds until you hear 2 vibrations confirming the reset
5. Release the trigger
6. Disconnect the battery — this final step is important, as it completes the entire process.
> ✅ **Informacja**
> ✅ The trigger must be pulled throughout the entire operation – from connecting the battery to sounding the vibration.
# Restoring Default Settings in the GCS App
> ✅ **Note**
> ✅ Restoring the default settings results in resetting your personal settings. This action **does not** erase adaptations, calibration of the trigger sensor and fire selector or statistical data.
Default settings can be restored only when ASTER II Bluetooth® is connected to the GCS app. Follow the steps below:
1. Launch the GCS app and connect the selected ASTER II Bluetooth® device to it.
2. Go to the **General **tab.
3. Open the menu in the upper right corner and select **Restore default settings**.
# Troubleshooting
## My replica fires multiple shots with a single trigger pull – no DTC in the GCS app
A combination of a very soft spring and high trigger sensitivity may cause unintended firing of the replica. A trigger with a soft spring easily transmits vibrations caused by the gearbox cycle, which can lead to additional, uncontrolled shots.
Possible solutions to the issue:
- install a stiffer trigger spring
- adjust the trigger sensitivity settings in the GCS app and increase the reset point distance from the firing point (increase the trigger travel needed to fire a shot)
- recalibrate the trigger in the GCS app
- if you encounter any issues, please contact us via [https://help.gatee.eu](https://help.gatee.eu)
## **Gear Not Detected [GND] in ASTER units**
ASTER units detect the cam of the gear. Excess grease on:
- the cam itself,
- between the shims and on the top of the cam,
may cause cycle detection issues—incorrect gear detection [GND] or even requiring a double trigger pull to complete a full gearbox cycle.
Possible solutions to the issue:
- clean the sector gear sensor with a soft cloth
- remove excess grease from the cam
- remove excess grease from the shims
- in G&G gearboxes, move the board as close as possible to the gear axis
- if you encounter any issues, please contact us via [https://help.gatee.eu](https://help.gatee.eu)
## Unable to update firmware of my ASTER on Android device
Your device is likely paired directly with your phone. You need to unpair it, as the connection should only be made through the GCS app.
Follow these steps:
1. Go to your phone’s list of paired Bluetooth devices.
2. Select your device from the list.
3. Tap the settings icon (gear icon).
4. Tap **"Forget"** (trash bin icon).
5. Open the **GCS app** and update your device.
If you encounter any issues, please contact us via [https://help.gatee.eu](https://help.gatee.eu)
## Low Battery Warnings
When activated in GCS, you are warned 5 times before the battery is discharged. Each warning is communicated by 3 vibrations: High → Mid → High.
## Vibrations after Connecting the Battery
ASTER II Bluetooth® can detect the number of battery cells automatically. If you activate this function, vibrations start once the battery is connected. Remember to always check if your ASTER II Bluetooth® detects the correct number of battery cells.
## Diagnostic Trouble Codes
Diagnostic Trouble Codes (DTC) enable detecting basic malfunctions and problems with your replica or ASTER II Bluetooth®. You are notified of the main errors by vibrations. DTCs can be read and cleared in the DTC menu in GCS.
> ✅ **Note**
> ✅ It is good practice to clear the DTCs in GCS before each skirmish.
# Technical Specifications
**The design and production of the device is based on harmonized standards.**
| **Supply Voltage Range [AEG]** | 3.75-12.9 VDC |
| --- | --- |
| **Supply Voltage Range [HPA]** | 5-8.6 VDC |
| **Rated Current** | 30 A |
| **Current Consumption** | 20 mA |
| **Low Power Mode** | 130 µA |
| **Connectivity** | Bluetooth® 5.2 Low Energy |
| **Dimensions (Length x Width x Thickness)** | 43.8 mm x 28.7 mm x 5.5 mm |
| **Finished Product Weight** | 23.4 g |
| **Operating Temperature Range** | min. -15° C, max. +50° C |
| **Relative Humidity** | ≤ 80% |
# Legal Notice
Please read the Legal Notice before operating your device and keep it for future reference. This document contains important terms and conditions with respect to your device. By using this device, you accept these terms and conditions.
## Exclusion of Liability
GATE Enterprise sp. z o.o. sp. k. is not liable for any damages, injuries or accidents of any kind resulting from the use of this product or airsoft gun with the product installed, including (but not limited to) incidental or special damages to airsoft gun, airsoft gun parts, batteries and gearbox internals.
## Disclaimer
GATE Enterprise sp. z o.o. sp. k. takes no responsibility regarding compliance of the product with the requirements of any law, rule or airsoft restrictions pertaining thereto.
## Intellectual Property
Intellectual Property owned by GATE Enterprise sp. z o.o. sp. k., including but not limited to, devices, accessories, parts, software, documentation, is proprietary to GATE Enterprise sp. z o.o. sp. k. and protected under Polish laws, EU laws, and international treaty provisions. You may not violate the rights of the Intellectual Property and you will not prepare derivative works of or reverse engineer the device or software. No ownership in the Intellectual Property is transferred to you.
## GATE Limited Warranty Policy
GATE Enterprise sp. z o.o. sp. k. warrants that its Product is free from manufacturing and material defects at the date of purchase and for a period of two (2) years from the date of purchase and it is nonextendable. This Limited Warranty is conditioned upon proper use of Product by Purchaser.
This Limited Warranty is valid provided that the owner provides a proof of purchase and properly completed warranty form.
This Limited Warranty does not cover: (a) defects or damage (e.g. mechanical, thermal or chemical) resulting from accident, misuse (misinterpretation of the instructions), abuse, neglect, unusual physical, electrical or electromechanical stress, water immersion, repairs or structural modification of any part of Product, or (b) the Product that has its serial number removed or made illegible; (c) defects or damage from improper operation, maintenance or installation, (d) installation of the products.
Requests for warranty are processed as soon as possible, not exceeding seven (7) working days. The company’s obligation under this Limited Warranty shall be limited to providing replacement of parts only.
The color of the product may vary slightly depending on the batch.
## Product Disposal Instructions
The symbol shown here means that the product is classified as Electrical or Electronic Equipment and should not be disposed with other household and commercial waste at the end of its working life. The Waste of Electrical and Electronic Equipment (WEEE Directive 2012/19/EU) has been put in place to recycle products using best available recovery and recycling techniques to minimize the impact on the environment. Purchasers shall take any old electrical equipment to waste recycling public centres or points of sale.
# Certificates and Regulations
## Bluetooth® Trademark Attribution
The Bluetooth® by both, the word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by GATE Enterprise sp. z o.o. sp. k. is subject to licensing. Other trademarks and trade names are those of their respective owners.
# Product Compliance
## Declaration of Conformity
GATE Enterprise sp. z o.o. sp. k. hereby declare under our sole responsibility that GATE ASTER II Bluetooth® is in conformity with the essential requirements of the following directives: 2014/53/UE, 2011/65/UE.
## Product Compliance Regarding the Use of the BGM220S Module
The BGM220S modules have been tested against the relevant harmonized standards and are in conformity with the essential requirements and other relevant requirements of the Radio Equipment Directive (RED) (2014/53/EU)
This device complies with FCC’s e-CFR Title 47, Part 15, Subpart C, Section 15.247 (and related relevant parts of the ANSI C63.10.2013 standard) when operating with the embedded antenna or with the antenna type(s) listed in 11.1.1 Qualified Antennas. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesirable operation. Any changes or modifications not expressly approved by Silicon Labs could void the user’s authority to operate the equipment
This radio transmitter (IC: 5123A-BGM220S for the BGM220S12A and IC: 5123A-BGM220S2 for the BGM220S22A) has been approved by Innovation, Science and Economic Development Canada (ISED Canada, formerly Industry Canada) to operate with the embedded antenna and with the antenna type(s) listed in 11.1.1 Qualified Antennas, with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain listed, are strictly prohibited for use with this device. This device complies with ISED’s license-exempt RSS standards. Operation is subject to the following two conditions:
1. This device may not cause interference; and
2. This device must accept any interference, including interference that may cause undesired operation of the device
** Contains a radio module**
Contient le module transmetteur: 5123A-BGM220S
This equipment operates on a secondary basis and, consequently, must accept harmful interference, including from stations of the same kind, and may not cause harmful interference to systems operating on a primary basis.
The BGM220S22A are certified in Japan with certification number 209-J00429.
The BGM220S22A modules have a RF certification for import and use in South-Korea. Certification number is: R-R-BGT-BGM220S2. The BGM220S modules come at launch with a pre-qualified Bluetooth Low Energy RF-PHY Tested Component having Declaration ID of D044526 and QDID of 155407, and having a listing date of 2020-09-04.
# Stay tuned with GATE
[GATE HELP CENTER](http://help.gatee.eu/)
[GATE Enterprise](http://www.gatee.eu/)
[Join the GATE Airsoft Community Discord Server!](http://discord.gatee.eu/)
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Manufactured by GATE Enterprise sp. z o.o. sp. k.
Torowa 3H
PL-30435 KRAKÓW
email: [support@gatee.eu](mailto:office@gatee.eu)
tel: +48 12 210 05 23
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