The SparkFun RPI-1031 Tilt-a-Whirl Breakout is a compact and versatile breakout board designed for the Raspberry Pi. It simplifies the integration of tilt sensors into your projects, enabling precise tilt detection and orientation sensing. This breakout board is ideal for applications such as motion detection, robotics, gaming controllers, and other projects requiring tilt-based input.

With its user-friendly design, the RPI-1031 is perfect for both beginners and experienced developers looking to add tilt functionality to their Raspberry Pi-based systems.

• Motion detection in robotics
• Gaming controllers with tilt-based input
• Orientation sensing in IoT devices
• Wearable technology
• Educational projects for learning about tilt sensors

• Manufacturer: SparkFun
• Part ID: RPI-1031
• Input Voltage: 3.3V (compatible with Raspberry Pi GPIO)
• Output Type: Digital (High/Low based on tilt state)
• Tilt Sensor Type: Ball-in-cage tilt switch
• Dimensions: 25mm x 25mm (1" x 1")
• Mounting Holes: 2x M2.5 for secure attachment
• Operating Temperature: -10°C to 50°C

The RPI-1031 breakout board has a simple 3-pin interface for easy connection to the Raspberry Pi or other microcontrollers.

1. Connect the Pins:

   • Connect the VCC pin of the RPI-1031 to the 3.3V pin on the Raspberry Pi.
   • Connect the GND pin to a ground pin on the Raspberry Pi.
   • Connect the OUT pin to a GPIO pin on the Raspberry Pi (e.g., GPIO17).

2. Mount the Breakout Board:
   Secure the breakout board using the mounting holes to ensure stable operation.

3. Read the Output:
   The OUT pin will output a HIGH signal (3.3V) when the tilt sensor is activated (tilted) and a LOW signal (0V) when the sensor is level.

• Voltage Compatibility: Ensure the breakout board is powered with 3.3V to avoid damage.
• Debouncing: The tilt sensor may produce noisy signals due to mechanical bouncing. Use software debouncing techniques to filter out false triggers.
• Orientation: The tilt sensor's sensitivity depends on its orientation. Test and adjust the mounting angle for optimal performance.
• Avoid Vibration: Excessive vibration may cause erratic behavior. Use vibration-dampening materials if necessary.

Below is an example Python script to read the tilt sensor's output using the Raspberry Pi's GPIO pins.

import RPi.GPIO as GPIO
import time

TILT_SENSOR_PIN = 17 # GPIO pin connected to the OUT pin of the RPI-1031

GPIO.setmode(GPIO.BCM) # Use BCM pin numbering GPIO.setup(TILT_SENSOR_PIN, GPIO.IN) # Set the pin as an input

print("Tilt Sensor Test - Press Ctrl+C to exit")

try: while True: if GPIO.input(TILT_SENSOR_PIN): # Check if the sensor is tilted print("Tilt detected!") else: print("Sensor is level.") time.sleep(0.1) # Small delay to reduce CPU usage except KeyboardInterrupt: print("Exiting program.") finally: GPIO.cleanup() # Reset GPIO settings

---

1. No Output Signal:

   • Cause: Incorrect wiring or loose connections.
   • Solution: Double-check the wiring and ensure all connections are secure.

2. Erratic Behavior:

   • Cause: Mechanical bouncing or excessive vibration.
   • Solution: Implement software debouncing in your code and minimize vibrations.

3. Sensor Always HIGH or LOW:

   • Cause: Faulty tilt sensor or incorrect orientation.
   • Solution: Test the sensor with a multimeter and adjust its orientation.

4. GPIO Pin Not Responding:

   • Cause: GPIO pin not configured correctly in the code.
   • Solution: Verify the GPIO pin number in the script and ensure it matches your wiring.

Q: Can I use the RPI-1031 with a 5V microcontroller?
A: The RPI-1031 is designed for 3.3V operation. Using it with a 5V microcontroller may damage the board. Use a level shifter if necessary.

Q: How do I debounce the tilt sensor signal?
A: You can implement software debouncing by adding a small delay (e.g., 50ms) after detecting a tilt event to filter out noise.

Q: Can I use multiple RPI-1031 boards in one project?
A: Yes, you can connect multiple boards to different GPIO pins on the Raspberry Pi. Ensure each board has its own unique GPIO connection.

Q: Is the RPI-1031 compatible with Arduino?
A: While designed for the Raspberry Pi, the RPI-1031 can be used with Arduino boards that operate at 3.3V. Connect the pins accordingly and use digital input functions to read the sensor's output.

This concludes the documentation for the SparkFun RPI-1031 Tilt-a-Whirl Breakout. For additional support, visit the SparkFun website.