This is a sample code to read SonarPen pressure and button in Python. Plugin the SonarPen before running this code, and make sure Windows Driver is not running at the same time.
PyAudio library is used to produce sound to communicate with the SonarPen. It must be installed for the code to work. (available for Windows, MacOS and Linux)

SonarPen USB Type-C adatper or USB Type-C SonarPen is needed for the app to work

import pyaudio
import numpy as np
import threading
import keyboard

# Set the frequency of the tone
frequency = 2000

# Set the sample rate
sample_rate = 44100

# Generate the tone
tone = (np.sin(2*np.pi*np.arange(sample_rate)*frequency/sample_rate)).astype(np.float32)

# Initialize Pyaudio
p = pyaudio.PyAudio()

def play_tone():
    # Open a stream
    stream = p.open(format=pyaudio.paFloat32,
                    channels=1,
                    rate=sample_rate,
                    output=True)
    while True:
        try:
            # Play the tone
            stream.write(tone.tostring())
        except Exception as e:
            print(e)
            break
    # Close the stream
    stream.stop_stream()
    stream.close()

def record_amplitude():
    # Open a stream for recording
    stream = p.open(format=pyaudio.paFloat32,
                    channels=1,
                    rate=sample_rate,
                    input=True,
                    frames_per_buffer=int(sample_rate * 0.01))
    while True:
        try:
            # Record audio for 10ms
            data = stream.read(int(sample_rate * 0.01))
            # Convert the data to a numpy array
            data = np.fromstring(data, dtype=np.float32)
            # Get the amplitude of the right channel
            amplitude = np.max(np.abs(data))
            # Display the amplitude
            print("Amplitude:", amplitude)
        except Exception as e:
            print(e)
            break
    # Close the stream
    stream.stop_stream()
    stream.close()
    
        
def playpause_button():
    # detect button press
    while True:
        if keyboard.read_key() == "play/pause media":
            print("Button ======================================")
            

# Start the threads
print("If you are running this Pythono on a Windows PC, make sure SonarPen Windows Driver is not running or NO pressure will be detected.")
play_thread = threading.Thread(target=play_tone)
record_thread = threading.Thread(target=record_amplitude)
button_thread = threading.Thread(target=playpause_button)
play_thread.start()
record_thread.start()
button_thread.start()

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