Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	GY-25A
Measurement Axes	Dual-Axis (X, Y)
Communication Interface	TTL Serial / Analog Output
Operating Voltage	3.3V - 5V DC
Measurement Range	-90° to +90°
Resolution	0.01°
Accuracy	±0.1° (Static)
Response Time	< 20ms
PCB Dimensions	22mm x 17mm x 4mm
Compatible Replacement	SCA60C Series

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Perfect drop-in replacement for SCA60C

I needed a sensor to replace an old SCA60C in a robotics project, and this GY-25A worked flawlessly. The serial output is stable, and the angle calculations are very precise even with slight vibrations.

Anonymous

Mar 27, 2026

Rating: 5/5

Reliable industrial grade performance

Used this for a solar tracker application. It maintains its zero point well over temperature changes. The analog output option is also a nice backup if the serial line gets noisy.

Anonymous

Mar 14, 2026

Rating: 4/5

Solid performance for static tilt

Works great for static inclination detection. Note that like most MEMS sensors, it is not suitable for measuring dynamic acceleration during high-speed movement, but for tilt detection, it is perfect.

Anonymous

Mar 10, 2026

Rating: 4/5

Great accuracy, easy to integrate

The dual-axis measurement is accurate enough for my stabilizer gimbal. Integration with Arduino was straightforward using the TX/RX pins. Only minor issue is the pin spacing which required a custom adapter.

Anonymous

Mar 06, 2026

Rating: 5/5

Fast shipping and works as described

Arrived quickly and was well packaged. The module is compact and the soldering pads are large enough for hand soldering. The documentation provided by the seller helped me get the baud rate set correctly immediately.

Anonymous

Mar 03, 2026

Rating: 5/5

Excellent value for money

For the price, you cannot beat the precision. I compared it against a much more expensive inclinometer, and the readings were nearly identical. Highly recommended for DIY projects.

5 FAQ

Q: Does this module support 3.3V logic levels directly?

A: Yes, the GY-25A operates on a voltage range of 3.3V to 5V, so it can be connected directly to 3.3V microcontrollers without level shifters.

Q: What is the default baud rate for the serial output?

A: The default baud rate is typically 9600 bps, but it can be configured to other standard rates like 19200 or 115200 via specific command strings found in the datasheet.

Q: How do I calibrate the zero point?

A: Place the sensor on a perfectly flat surface and send the calibration command via serial terminal. The specific command sequence is detailed in the user manual included with the product.

Q: Is there a library available for ESP32?

A: While we do not provide an official library, many users have successfully implemented it using standard Serial communication libraries on ESP32 by parsing the ASCII string output.

Q: Can this measure 360-degree rotation?

A: No, this is a dual-axis inclination sensor designed for tilt measurement within a range of -90 to +90 degrees. It is not a gyroscope and cannot measure continuous 360-degree rotation.

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