read_data_from_simdevice.py

import opendaq
import time

# Create a fresh openDAQ™ instance
instance = opendaq.Instance()

device = None
# Find and connect to a simulator device
print("Searching for the device simulator...")
for device_info in instance.available_devices:
    if device_info.name == 'Reference device simulator':
        device = instance.add_device(device_info.connection_string)
        print("Connected to:", device.info.name)
        break
else:
    print("Device simulator not found. Please ensure it is running.")
    exit(0)

# 1. Get the first signal of the first channel
channel = device.channels[0]
signal = channel.signals[0]
print("Reading from signal:", signal.name)

# 2. Create a StreamReader for the signal
# By default, it reads values as Float64 (double)
reader = opendaq.StreamReader(signal)

# 3. Use a TimeStreamReader for easy timestamp conversion
time_reader = opendaq.TimeStreamReader(reader)

print("\n--- Reading 20 samples with timestamps ---")
# Read data in a loop
for i in range(20):
    # Wait for some data to be generated
    time.sleep(0.1)

    # Read up to 100 available samples with timestamps
    samples, timestamps = time_reader.read_with_timestamps(100)

    # Print the last received sample and its timestamp, if any
    if len(samples) > 0:
        print(f"Value: {samples[-1]:.4f}, Timestamp: {timestamps[-1]}")

print("\n--- Finished reading ---")