⚙️ IMU Sensor Calibration (Accelerometer & Gyroscope)

The Inertial Measurement Unit (IMU) is the core sensor package (Gyroscope and Accelerometer) critical for stable flight control. Recalibration is necessary following a crash, after hard landings, or when the RoBeeX app specifically requests it (e.g., when the Sensor calibration required message is shown on the flight screen).

DANGER

🔴🟡 CRITICAL WARNING: Sensor Error

If the drone's RGB LEDs start flashing alternating RED and YELLOW (🔴🟡), this indicates a critical sensor error and confirms that the IMU needs immediate calibration.

1. 🛠️ Preparation and Connection

Before beginning any calibration, ensure the following steps are complete:

1. Safety & Battery:

   • Remove all propeller guards from the aircraft.
   • Ensure the drone battery is above 50%.

2. Power & Wi-Fi Connection:

   • Power On: Turn on your RoBeeX AI Drone.

   

   • Connect Mobile/PC: Go to your device's settings and manually connect to the drone's Wi-Fi network (e.g., ROBEEX_AI_DRONE_XXXXXX).

     Wi-Fi Password: The default password for any RoBeeX AI Drone is 1234567890.

   • App Status: Return to the RoBeeX app. The main screen should now show "Connected".

🚨Connection Prerequisite Notice

IMPORTANT: Please ensure the following settings are TURNED OFF on your mobile device or laptop before attempting to connect to the RoBeeX Drone's Wi-Fi network:

• Turn Off VPN (Virtual Private Network).
• Turn Off Mobile Data.

These services can interfere with the direct peer-to-peer Wi-Fi connection required for communication with the drone.

2. 🎯 Gyroscope Calibration

The Gyroscope detects the drone's rotation. This simple procedure ensures zero-drift.

Procedure

1. Positioning (CRITICAL):
   • Place the RoBeeX drone on a surface that is perfectly level, flat, and stable (e.g., a solid table or floor).
   • The drone must be perfectly still during the calibration.
2. Initiation:
   • Open the RoBeeX app and navigate to Settings → Calibration tab.

* Under the **Gyro** section, select **"Calibrate"**.

3. Execution:
   • The app will show a screen instructing you to hold the drone still until the image turns Green.

* Wait for the app to confirm successful completion with **"Status: OK !"**.

4. Completion:
   • After receiving a success confirmation, power cycle the drone (turn it off and back on) to apply the new settings before flight.

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3. 📐 Accelerometer Calibration

🎥 Video Guide: How to calibrate accelerometer

The Accelerometer detects the drone's tilt. This procedure requires specific physical positioning of the drone.

Procedure

1. Initiation:
   • Open the RoBeeX app and navigate to Settings → Calibration tab.
   • Under the Accelerometer section, select "Calibrate."
2. Execution (Follow On-Screen Guide):
   • Carefully follow the on-screen instructions to position the drone at each required angle.
   • CRITICAL: Hold Drone still when an image is Yellow. The app will confirm when the orientation is successful by turning the box Green.

3. Completion:
   • The app will confirm when the entire calibration is successful.
   • After receiving a success confirmation, power cycle the drone to apply the new settings.

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⚠️ Troubleshooting Tip

Issue	Potential Cause	Solution
Flashing Red/Yellow LEDs	IMU sensor requires immediate calibration.	Follow the Gyroscope and Accelerometer procedures above.
Calibration Failed	Drone was bumped or moved during the process.	Repeat the procedure, ensuring the drone is absolutely still.
Calibration Failed	Strong magnetic interference nearby.	Move the entire setup to a location free of large metal objects or electronics.
Unstable Flight	IMU calibration is either outdated or incomplete.	Recalibrate IMU; Sensor calibration must be performed while the drone is stationary and not currently flying.