freemodbus | A Modbus ASCII/RTU and TCP implementation

by RT-Thread-packages C Version: Current License: Non-SPDX

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

kandi X-RAY | freemodbus Summary

freemodbus is a C library. freemodbus has no bugs, it has no vulnerabilities and it has low support. However freemodbus has a Non-SPDX License. You can download it from GitHub.

This is the Freemodbus protocol stack ported by armink. Support the functions of the master and slave at the same time.

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Quality

Security

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Support

freemodbus has a low active ecosystem.

It has 149 star(s) with 79 fork(s). There are 12 watchers for this library.

It had no major release in the last 6 months.

There are 7 open issues and 3 have been closed. On average issues are closed in 65 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of freemodbus is current.

Quality

freemodbus has 0 bugs and 0 code smells.

Security

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

freemodbus code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

freemodbus has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

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

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

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freemodbus Key Features

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freemodbus Examples and Code Snippets

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Community Discussions

Trending Discussions on freemodbus

CMakeLists - How to include a directory of source and header files?

Modbus TCP Remote Port

QUESTION

CMakeLists - How to include a directory of source and header files?

Asked 2021-Jul-09 at 16:35

I feel like this question has been asked a bunch of times, but none of the answers I have found seem to be working for me. I'm extremely new to CMake and C/C++ as I come from the world of Java, and am struggling to understand cmake and how it works.

Anyways, basically I have the folder structure below. This is an esp-idf project, so I don't know if that has anything to do with what I'm running into.

...

ANSWER

Answered 2021-Jul-09 at 13:46

The ESP-IDF build system is built on top of CMake. This means you can use all the standard features of CMake in your files. However, the the ESP-IDF system predefines many functions, and makes many assumptions about the layout of your project, supposedly to make things "easier". Instead of reading CMake documentation, start by reading and understanding the ESP-IDF build system documentation:

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html

It looks to me like there is a particular layout expected for subcomponents, including the format of the CMakeLists.txt file. Specifically, move Metriful under a new directory called components, or add Metriful to EXTRA_COMPONENT_DIRS near the top of your root CMakeLists.txt

If Metriful is not written as an esp-idf component, this may not work. However, the document also describes how to link to "pure CMake" components, which will look something like this (at the end of your root CMakeLists.txt).

Source https://stackoverflow.com/questions/68317455

QUESTION

Modbus TCP Remote Port

Asked 2021-Jan-13 at 17:38

I am using freemodbus library for stm32f4 for modbus slave device.

I have a problem with Modbus TCP remote port connection, When I powered up slave device, and connect to Modbus master PC than they communicate successfully, Than I unplug the ethernet cable from the modbus master side and they couldnt communicate with each other, When I analyse the problem I get very interesting information.

When I unplug the cable and connect again for PC. PC change remote port every time, so slave dont know prvxMBTCPPortAccept call back, calling every exceptable port request than, I analyse the pxPCBClient not null because of the before connection, and it doesnt clean after master port changing so everytime pxPCBClient != NULL than modbus TCP states contunie very interesting, pxPCB information have new connection request info when I compare

pxPCBClient->remote_port and pxPCB->remote_port Client remote port has before successfuly port information forever and pxPCB->remote_port changing every PC changing port.

How Can I solve this problem ? When I unplug the cable and connect again how to slave connect again ? Please help me

When I initlize the modbus TCP accept callback I used like this line:

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ANSWER

Answered 2021-Jan-13 at 17:38

The master connects to the slave. (It seems that you try to do the opposite)
The master is the client and the slave is the server.
The server listens for connections usually on Modbus port 502 and the client connects to this server port
The port that the client uses to connect does not matter, it is usually a high port number, normally greater than 10000, it is automatically assigned by the operating system and it changes each time it connects.
The server should not filter by client port number, it should accept any client port number

Source https://stackoverflow.com/questions/65697320

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