xmodem

import serial from xmodem import XMODEM # Configure your serial port here # For example, using a dummy serial port for demonstration # In a real application, replace with an actual serial port like '/dev/ttyUSB0' class DummySerial: def __init__(self, timeout=0): self.buffer = b'' def read(self, size): if not self.buffer: return b'' data = self.buffer[:size] self.buffer = self.buffer[size:] return data def write(self, data): # In a real scenario, this would send data over serial # For this dummy example, we just 'receive' it instantly # Or, you could print it to simulate output. # print(f"DummySerial sent: {data!r}") self.buffer += data # Simulate loopback or immediate reception return len(data) # Replace DummySerial() with serial.Serial('/dev/ttyUSB0', timeout=0) for actual use ser = DummySerial(timeout=0) def getc(size, timeout=1): return ser.read(size) or None def putc(data, timeout=1): return ser.write(data) modem = XMODEM(getc, putc) # --- Example: Sending a file --- print("Attempting to send data...") # Create a dummy stream for demonstration import io stream_to_send = io.BytesIO(b"Hello, XMODEM world! This is a test file.\n") # In a real scenario, this would be `open('/path/to/file', 'rb')` # status = modem.send(stream_to_send) # print(f"Send status: {status}") # Due to the complexity of XMODEM handshakes in a simple script # without a cooperating receiver, the send/recv calls are commented out. # A successful transfer requires a matching XMODEM receiver on the other end. print("To send a file: modem.send(file_stream_object)") print("To receive a file: modem.recv(file_stream_object)") print("Note: A full XMODEM transfer requires a corresponding receiver/sender.") # --- Example: Receiving a file --- # stream_to_receive = io.BytesIO() # received_bytes = modem.recv(stream_to_receive) # if received_bytes is not None: # print(f"Received {received_bytes} bytes: {stream_to_receive.getvalue()!r}") # else: # print("Failed to receive data.")