GCM380/GCM385-N 3D Electronic Compass Product manual V1.7-20250628

^Technical Highlights ❖ Measurement range: Roll ±180°, Pitch ±85°; ❖ Accuracy: Roll/Pitch 0.1°, Heading 0.5°; ❖ Standard RS232/RS485/TTL output interfaces; ❖ Includes hard-iron, soft-iron, and tilt compensation Product Introduction- The GCM380/GCM385-N is a 3D electronic compass that balances high performance with cost-effectiveness. It utilizes our proprietary, patented calibration technology, ensuring a streamlined and efficient setup process. Equipped with a built-in high-precision accelerometer for tilt compensation, the device delivers stable and reliable heading data across a full 360°roll...

Ordering and Selection Model Housing Packaging 0: PCBA Board Signal Output SP: Serial communication protocol NMEA: NMEA Protocol Installation Orientation Output Protocol H: Horizontal installation V: Vertical installation TTL: TTL Level E.g: GCM380-232SP-H: PCBA board / RS232 output / Serial communication protocol / Horizontal mounting. Product Dimensions PCBA Dimension Diagram PCBA dimensions: L33 × W27 × H9.5 mm Mounting dimensions: L28.5 × W22.6 × H2 mm Recommended screws: 4 × M3 screws(copper screws) Housing Dimension Diagram Housing dimensions: L61.3 × W49 × H25.5 mm Mounting dimensions:...

Azimuth measurement using a 3D electronic compass is based on the principle of geomagnetic sensing; therefore, the installation environment must meet strict requirements for controlling magnetic interference. To ensure measurement accuracy, the following installation guidelines should be observed: 1. Magnetic Environment Requirements: The installation site must be kept away from ferromagnetic materials (e.g., iron objects, permanent magnets) and electromagnetic equipment (e.g., electric motors, transformers). A minimum clearance of 40 cm from potential interference sources must be maintained...

Calibration method Calibration prerequisites: 1) The compass accuracy fails to meet requirements; 2) If the installation environment involves fixed magnetic field interference (e.g., mounting on ferrous material), the interference source must be rotated synchronously with the compass during calibration, and their relative positions must remain fixed during operation; otherwise, recalibration is required. If the interference source varies in size or distance (e.g., movable iron components), calibration is not possible, and a minimum installation clearance of 30 cm must be maintained. Horizontal...

- www.ruicomtech.com Vertical installation calibration mode: 1) Connect the communication port correctly using the HCM compass and turn on the power. 2) Planar rotation—more than 360°: As shown in Figure D Horizontal Calibration Start Command 68 04 00 41 45 Data field(0 byte) Rotate horizontally at a constant speed for at least one full revolution, ensuring the duration is 20 seconds or longer. The saved value is valid only if the duration is 20 seconds or more; it is invalid if the duration is less than 20 seconds. Horizontal Calibration Save Command 68 04 00 51 55 Data field(0byte) No data...

1. Data frame format: (8 data bits, 1 stop bit, no parity, default baud rate 9600) Data Length: Length from the Data Length field to the Checksum (inclusive); Address Code: Address of the data acquisition module; default is 00; Data Field: Content and length vary according to the Command Code; Checksum: Sum of Data Length, Address Code, Command Code, and Data Field (ignoring the carry). 2. Command Word Parsing Read Roll/Pitch/Heading Command with no data field 0X84 Sensor response Data field(10 byte) 10 05 01 04 01 00 1D AA AB BB:3 red bytes representing the Pitch axis CC CD DD:3 blue bytes representing...

00 00 00 01 02 01 AA AB BB represents X-axis acceleration CC CD DD represents Y-axis acceleration EE EF FF represents Z-axis acceleration In the E.g: X-axis acceleration = 0.01g, Y-axis acceleration = -0g, Z-axis acceleration = 1.02g High 4 bits of the first byte: Sign bit Low 4 bits of the first byte: Hundreds digit High 4 bits of the second byte: Tens digit Low 4 bits of the second byte: Ones digit High 4 bits of the third byte: Tenths digit Low 4 bits of the third byte: Hundredths digit 0X61 Read magnetometer command Data field (0 bytes) 0XE1 Respond to magnetometer Three bytes represent one...

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