The YMODEM project is based on XMODEM implementation written by tehmaze. It is also compatible with XMODEM mode.
Interact with SecureCRT as sender
Interact with SecureCRT as Finder
pip install ymodem# To get help
ymodem -h
# or
python -m ymodem -hymodem send ./file.bin ./file2.bin -p COM4 -b 115200
# or
python -m ymodem send ./file.bin ./file2.bin -p COM4 -b 115200ymodem recv ./ -p COM4 -b 115200
# or
python -m ymodem recv ./ -p COM4 -b 115200from ymodem.Socket import ModemSocket
# define read
def read(size, timeout = 3):
# implementation
# define write
def write(data, timeout = 3):
# implementation
# create socket
cli = ModemSocket(read, write)
# send multi files
cli.send([file_path1, file_path2, file_path3 ...])
# receive multi files
cli.recv(folder_path)For more detailed usage, please refer to main.py.
def __init__(self,
read: Callable[[int, Optional[float]], Any],
write: Callable[[Union[bytes, bytearray], Optional[float]], Any],
protocol_type: int = ProtocolType.YMODEM,
protocol_type_options: List[str] = [],
packet_size: int = 1024,
style_id: int = _psm.get_available_styles()[0]):- protocol_type: Protocol type, see Protocol.py
- protocol_type_options: such as g representing the YMODEM-G in the YMODEM protocol.
- packet_size: The size of a single packet, 128/1024 bytes, may be adjusted depending on the protocol style
- style_id: Protocol style, different styles have different support for functional features
def send(self,
paths: List[str],
callback: Optional[Callable[[int, str, int, int], None]] = None
) -> bool:-
callback: callback function. see below.
Parameter Description task index index of current task task (file) name name of the file total packets number of packets plan to send success packets number of packets successfully sent
def recv(self,
path: str,
callback: Optional[Callable[[int, str, int, int], None]] = None
) -> bool:- path: folder path for storing the target file
- callback: callback function. Same as the callback of send().
Depending on different communication environments, developers may need to manually adjust timeout parameters in _read_and_wait or _write_and_wait.
If you want to output debugging information, set the log level to DEBUG.
logging.basicConfig(level=logging.DEBUG, format='%(message)s')- Added cli tool to iteract with YMODEM via Serial bus
- Rewritten send() and recv()
- Support YMODEM-G. The success rate of YMODEM-G based on pyserial depends on the user's OS, and after testing, the success rate is very low without any delay.
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