Xmodem | Sending data using Xmodem and serial port

by JuliaSzymanska Python Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | Xmodem Summary

Xmodem is a Python library typically used in Internet of Things (IoT), Arduino applications. Xmodem has no bugs, it has no vulnerabilities and it has low support. However Xmodem build file is not available. You can download it from GitHub.

Breaks up the original data into blocks that are sent to the receiver, along with information allowing to determine whether that packet was correctly received(checksum, block number, completing the block number). If an error is detected, the receiver requests that the packet be re-sent.

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Quality

Security

License

Reuse

Support

Xmodem has a low active ecosystem.

It has 3 star(s) with 0 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

Xmodem has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Xmodem is current.

Quality

Xmodem has 0 bugs and 0 code smells.

Security

Xmodem has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

Xmodem code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

Xmodem does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

Xmodem releases are not available. You will need to build from source code and install.

Xmodem has no build file. You will be need to create the build yourself to build the component from source.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed Xmodem and discovered the below as its top functions. This is intended to give you an instant insight into Xmodem implemented functionality, and help decide if they suit your requirements.

Sends the data for each block
Sends the received blocks
Next event handler
Next event handler

Get all kandi verified functions for this library.

Xmodem Key Features

No Key Features are available at this moment for Xmodem.

Xmodem Examples and Code Snippets

No Code Snippets are available at this moment for Xmodem.

Community Discussions

Trending Discussions on Xmodem

Bash - Reading from file descriptor simultaneously

How to format a byte array to a 16bit CRC check for a Modbus frame?

QUESTION

Bash - Reading from file descriptor simultaneously

Asked 2022-Mar-06 at 00:30

I am working with Linux file descriptor at the moment to communicate with an external device via serial port, and I wonder if it is possible for me to duplicate the result returned the device.

In details, I used file descriptor number 5 to read and write to the serial port /dev/ttyACM0 in a raspbian device.

...

ANSWER

Answered 2022-Mar-06 at 00:30

Try

Source https://stackoverflow.com/questions/71362794

QUESTION

How to format a byte array to a 16bit CRC check for a Modbus frame?

Asked 2020-May-25 at 20:29

I am currently trying to use an Arduino UNO R3 as a master in a Modbus serial (not TCP/IP) communications protocol. I have attempted to use outdated libraries for this with no avail, mostly due to deprecated dependencies. Anyways I decided to start from scratch and my current goal is to write a value to register 301 (starting address 300) to a slave I.D. "5". Before connecting to my slave I want to make sure I can regenerate the CRC for the frame depending on whether I write a 0, 1, or 2 to the register. For writing a 1 I have the frame as "05 06 01 2D 00 01 D8 7B" and from my research I can tell that "D8 7B" is the 16-bit CRC for the data. However the problem is that I can't seem to replicate the CRC output on my Arduino. I believe it has to do with how I have prepared and formatted my byte array but I am not sure. I do not understand the CRC algorithms well which is why I am using a library, any help would be greatly appreciated.

The following code is a slight variation of the example sketch provided with vinmenn's Crc16 library.

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ANSWER

Answered 2020-May-25 at 20:05

As for replicating Modbus CRC16 with byte by byte method, according to the source, you need to use the parameters:

poly=0x8005
init=0xffff
refin=true
refout=true
xorout=0x0000
check=0x4b37

which means you should initialize crc as:

Source https://stackoverflow.com/questions/62009020

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install Xmodem

You can download it from GitHub.
You can use Xmodem like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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