After resolving the previous issues in my gesture recognition project on the `ESP32` with `TinyML`, I’m now encountering a new problem. The program crashes intermittently with the following error:

“`
IndexError: index 3 is out of bounds for axis 0 with size 3
“`

This happens when I try to run inference. Here’s the relevant section of the code:

“`python
def get_sensor_data():
accel = mpu.accel
return np.array([accel.x, accel.y, accel.z]) # Collect accelerometer data

while True:
try:
data = get_sensor_data()
gesture = predict_gesture(data) # Run inference on sensor data

if gesture == “wave”:
print(“Wave gesture detected!”)
elif gesture == “swipe”:
print(“Swipe gesture detected!”)
else:
print(“No gesture detected”)

time.sleep(0.3)

except Exception as e:
print(“Error:”, e)
time.sleep(1)
“`

It seems the error occurs when passing `data` to the `predict_gesture` function. I suspect that the shape of the data might be incorrect or the model is expecting more input features than provided.

How can I fix this `IndexError` and ensure the sensor data has the correct shape for inference?