hidapi

import hid import os import time # --- Enumerate devices (useful for finding VID/PID) --- print('Enumerating HID devices:') for device_dict in hid.enumerate(): print('---') for key, value in device_dict.items(): print(f'{key}: {value}') print('---\n') # --- Connect, read, and write (example with placeholder VID/PID) --- # Replace with your device's Vendor ID and Product ID. # On Linux, you may need appropriate udev rules or root privileges. # On Windows, you might need hidapi.dll in your PATH. VENDOR_ID = int(os.environ.get('HIDAPI_VENDOR_ID', '0x0000'), 16) # Example: 0x534C for Trezor PRODUCT_ID = int(os.environ.get('HIDAPI_PRODUCT_ID', '0x0000'), 16) # Example: 0x0001 for Trezor One if VENDOR_ID == 0x0000 or PRODUCT_ID == 0x0000: print('Warning: Please set HIDAPI_VENDOR_ID and HIDAPI_PRODUCT_ID environment variables for a real test.') print('Falling back to placeholder values; device opening may fail.') try: print(f'Attempting to open device VID: {hex(VENDOR_ID)}, PID: {hex(PRODUCT_ID)}') h = hid.device() h.open(VENDOR_ID, PRODUCT_ID) print(f'Manufacturer: {h.get_manufacturer_string()}') print(f'Product: {h.get_product_string()}') print(f'Serial No: {h.get_serial_number_string()}') h.set_nonblocking(1) # Enable non-blocking mode # Example: Write some data (replace with actual device commands) print('Writing example data...') # Ensure data length matches device report size, padded with zeros if needed. # The first byte might be a Report ID, or 0 if not used by the device. data_to_write = [0, 63, 35, 35] + [0] * 60 # Example 64-byte report h.write(data_to_write) time.sleep(0.05) # Example: Read data print('Reading data...') read_data = [] while True: d = h.read(64) # Read up to 64 bytes if d: read_data.extend(d) else: break if read_data: print(f'Read data: {read_data}') else: print('No data read.') print('Closing the device.') h.close() except IOError as ex: print(f'Error opening or communicating with device: {ex}') print('Ensure the device is connected and permissions are correct.') except Exception as e: print(f'An unexpected error occurred: {e}')