### Build Snap7 on Linux/MIPS

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on Linux and MIPS systems using the 'make' command. Supports clean, all, and install targets.

```makefile
make [clean|all|install]
```

--------------------------------

### Build Snap7 on OSX/BSD

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on OSX and BSD systems using the 'gmake' command. Supports clean, all, and install targets.

```makefile
gmake [clean|all|install]
```

--------------------------------

### Install Build Tools on Linux

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command installs the necessary C++ build tools on Debian-based Linux distributions, which are required to compile Snap7.

```Shell
sudo apt install build-essential
```

--------------------------------

### Snap7 C++ Project Embedding Example

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

An example is provided for embedding Snap7 within a C++ project without relying on the snap7.dll. This allows for a more integrated build process and potentially smaller deployment sizes.

```C++
// Example of including Snap7 headers in a C++ project:
// #include "snap7.h"

// Snap7 client initialization and usage within the project:
// Snap7::CClient client;
// client.Connect("192.168.1.10", "user", "pass", "rack", "slot");
// ...
// client.Disconnect();
```

--------------------------------

### Build Snap7 on Solaris (64-bit, GNU)

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on 64-bit Solaris systems using the GNU compiler and a specific makefile. Supports clean, all, and install targets.

```makefile
gmake -f x86_64_solaris_gcc.mk [clean|all|install]
```

--------------------------------

### Build Snap7 on Solaris (32-bit, GNU)

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on 32-bit Solaris systems using the GNU compiler and a specific makefile. Supports clean, all, and install targets.

```makefile
gmake -f i386_solaris_gcc.mk [clean|all|install]
```

--------------------------------

### Snap7 .NET Demos and Solution

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Provides .NET WinForm demos and a solution for rebuilding snap7.net.cs. These examples demonstrate the use of Snap7 functionalities within a .NET environment.

```C#
// Example for .NET WinForm demos and snap7.net.cs rebuilding
// Refer to the project's release notes for specific file locations and usage.
```

--------------------------------

### Build Snap7 on Solaris (64-bit, Oracle Solaris Studio)

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on 64-bit Solaris systems using the Oracle Solaris Studio compiler and a specific makefile. Supports clean, all, and install targets.

```makefile
gmake -f x86_64_solaris_cc.mk [clean|all|install]
```

--------------------------------

### Snap7 Pascal Client Example Fix

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Corrects an expression bug in the Pascal client example (`client.dpr`). The condition `if ParamCount=4` was incorrect and has been changed to `if ParamCount=3`.

```pascal
// Expression bug in line 491 of /examples/pascal/client.dpr
// "if ParamCount=4" must be "if ParamCount=3"
// (thanks to Jean-Noel Voirol)
```

--------------------------------

### Compile Snap7 on OSX/BSD

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command compiles the Snap7 library for macOS and BSD systems using the 'gmake' utility. It supports cleaning, building, and installing the library.

```Shell
gmake [clean | all | install]
```

--------------------------------

### Snap7 Client Library Compilation

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Details on compiling the Snap7 client library, including platform-specific instructions for Unix and macOS. Covers changes in library suffixes and installation paths.

```Make
# Example make command for Unix client library installation
# make LibInstall=/new/path
```

```Make
# Example make command for macOS library suffix override
# make LibExt=.dylib
```

--------------------------------

### Build Snap7 on Solaris (32-bit, Oracle Solaris Studio)

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on 32-bit Solaris systems using the Oracle Solaris Studio compiler and a specific makefile. Supports clean, all, and install targets.

```makefile
gmake -f i386_solaris_cc.mk [clean|all|install]
```

--------------------------------

### Compile Snap7 on Linux/MIPS

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command compiles the Snap7 library for Linux and MIPS architectures using the 'make' utility. It can also be used to clean previous builds or install the compiled library.

```Shell
make [clean | all | install]
```

--------------------------------

### Snap7 Client: Get Connected Status

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Introduces the `Cli_GetConnected` function for the Snap7 client. This function allows developers to retrieve the current connection status of the client to the PLC.

```pascal
// Cli_GetConnected function added.
// It returns the connection status of the client.
```

--------------------------------

### Snap7 Resourceless Server

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Snap7Server can now operate in a 'resourceless' mode. In this mode, instead of sharing resources (DB, E, A), a callback is invoked for each read/write request. This callback receives the TAG information (memory type, DB number, start, size, WordLen) and a pointer to the server's internal area for data access. This feature is useful for protocol converters, HMI analyzers, and flow splitters/routers.

```C++
// Callback function signature example:
// int OnResourceRequest(Tag* tag, void* buffer, int size);
```

--------------------------------

### Build Snap7 on Windows

Source: https://github.com/davenardella/snap7/blob/main/build/README.txt

Instructions for building the Snap7 library on Windows using Visual Studio. Users should open the provided solution file and build the project.

```c++
Open the Solution file (windows/VSXXXX/VSXXXX.sln) with Visual Studio (Community Edition is fine) and build.
```

--------------------------------

### Clone Snap7 Repository

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command downloads the Snap7 source code from the official GitHub repository using Git. This is the first step for compiling Snap7 on Unix-like systems.

```Shell
git clone https://github.com/davenardella/snap7.git
```

--------------------------------

### Compile Snap7 on Solaris 64-bit (GNU Toolchain)

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command compiles the Snap7 library for 64-bit Solaris systems using the GNU Toolchain and a specific makefile.

```Shell
gmake -f x86_64_solaris_gcc.mk [clean | all | install]
```

--------------------------------

### Compile Snap7 on Solaris 64-bit (Oracle Studio)

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command compiles the Snap7 library for 64-bit Solaris systems using the Oracle Solaris Studio compiler and a specific makefile.

```Shell
gmake -f x86_64_solaris_cc.mk [clean | all | install]
```

--------------------------------

### Compile Snap7 on Solaris 32-bit (GNU Toolchain)

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command compiles the Snap7 library for 32-bit Solaris systems using the GNU Toolchain and a specific makefile.

```Shell
gmake -f i386_solaris_gcc.mk [clean | all | install]
```

--------------------------------

### Compile Snap7 on Solaris 32-bit (Oracle Studio)

Source: https://github.com/davenardella/snap7/blob/main/readme.md

This command compiles the Snap7 library for 32-bit Solaris systems using the Oracle Solaris Studio compiler and a specific makefile.

```Shell
gmake -f i386_solaris_cc.mk [clean | all | install]
```

--------------------------------

### Snap7 S7Client .NET Improvements

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Highlights improvements made to the S7Client.ReadMultivars and Write methods in the .NET implementation, enhancing their functionality and robustness.

```C#
// Example of improved S7Client.ReadMultivars in .NET
// Refer to the project's release notes for specific code changes.
```

--------------------------------

### Snap7 VS2008 Compatibility

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Modifications made to client.cs and ppartner.cs to ensure compatibility with Visual Studio 2008, which had limitations with constant default parameters in method declarations.

```C#
// Example of modification for VS2008 compatibility in client.cs
// Refer to the project's release notes for specific code changes.
```

```C#
// Example of modification for VS2008 compatibility in ppartner.cs
// Refer to the project's release notes for specific code changes.
```

--------------------------------

### Snap7 Client: Set Connection Parameters

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Introduces the `Cli_SetConnectionParams` function for the Snap7 client. This allows setting the Local and Remote TSAP (Transport Service Access Point) before establishing a connection, which is necessary for devices like LOGO, S7200, and future hardware compatible with S7Protocol.

```pascal
// Cli_SetConnectionParams function added.
// For a Client now it's possible to specifying Local and Remote TSAP before the
// connection.
// Needed for LOGO, S7200 and future hardware compatible with S7Protocol.
```

--------------------------------

### Snap7 Helper Class/Functions

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Includes helper classes and functions for inserting and extracting S7 typed variables from a byte array buffer. These are available in wrappers for .NET, Pascal, and C++.

```.NET
// Example for .NET helper class usage
// Refer to the project's release notes for specific file locations and usage.
```

```Pascal
// Example for Pascal helper class usage
// Refer to the project's release notes for specific file locations and usage.
```

```C++
// Example for C++ helper class usage
// Refer to the project's release notes for specific file locations and usage.
```

--------------------------------

### Snap7 .NET Wrapper Improvements

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

The S7 Helper class in the .NET wrapper has been enhanced to support conversion of all S7 types, including new 64-bit types for S71200/1500. This includes signed and unsigned values of 8, 16, 32, and 64 bits, Long real (64 bit), and Long Date/Time, Long Time of Day. A new class, S7MultiVars, simplifies reading and writing of MultiVars.

```.NET
// Example usage of S7Helper for 64-bit types
// S7Helper.ReadInt64(buffer, offset);
// S7Helper.WriteInt64(buffer, offset, value);

// Example usage of S7MultiVars
// S7MultiVars multiVars = new S7MultiVars();
// multiVars.Add(var1);
// multiVars.Add(var2);
// client.WriteMultiVars(multiVars);
```

--------------------------------

### Snap7 Core Library Bug Fixes

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Details bug fixes in the core Snap7 library, including issues in Read/WriteMultiVars functions, block download functionality, and partner transfer logic.

```C++
// Example of a bug fix in s7_micro_client.cpp (block download)
// Refer to the project's release notes for specific code changes.
```

```C++
// Example of a bug fix in s7_partner.cpp (transfers > PDU size)
// Refer to the project's release notes for specific code changes.
```

```C++
// Example of a bug fix in s7_server.cpp (wrong bit access)
// Refer to the project's release notes for specific code changes.
```

--------------------------------

### Snap7 S7API Directive Fix

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Correction of missing S7API directives for two functions within the snap7_libmain.h header file.

```C++
// Example of missing S7API directive fix in snap7_libmain.h
// Refer to the project's release notes for specific code changes.
```

--------------------------------

### Snap7 Bug Fixes in .NET

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Addresses specific bug fixes within the Snap7 .NET implementation, including corrections in snap7.net.cs for functions like Cli_GetPlcStatus and Snap7.S7Server.Srv_RegisterArea.

```C#
// Example of a fixed bug in snap7.net.cs (Cli_GetPlcStatus)
// Refer to the project's release notes for specific code changes.
```

```C#
// Example of a fixed bug in snap7.net.cs (Snap7.S7Server.Srv_RegisterArea)
// Refer to the project's release notes for specific code changes.
```

--------------------------------

### Snap7 Server: Set Read Events Callback

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Adds the `Srv_SetReadEventsCallback` function to the Snap7 server. This function allows intercepting read events from a client before the data is actually retrieved, enabling custom handling or logging.

```pascal
// Srv_SetReadEventsCallback function added.
// It allows to trap the read event from a client *before* the data getting.
```

--------------------------------

### C# Callback Handling in Snap7

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Addresses a common issue in .NET where the garbage collector might reclaim delegates called by unmanaged code. Storing the callback address in a static variable is recommended to prevent this. This is crucial for users planning to use Snap7 or other unmanaged callbacks.

```csharp
// Add a static var to contain the callback addresses into c# examples.
// The .net garbage collector *sometime* garbages the delegates (called by unmanaged
// code) if their address is not stored into a static var.
// MS says that it's not a clr bug (maybe a feature ????) 
// However this solves the problem.
// PLEASE SEE THE .NET EXAMPLES IF YOU PLAN TO USE SNAP7 (or other unmanaged)
// CALLBACKS.
// (Thanks to Martin Bratt for reporting).
```

--------------------------------

### Snap7 Client: Set Connection Type

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

Adds the `Cli_SetConnectionType` function to the Snap7 client. This enables specifying the connection type to the PLC, such as PG (Programming Device), OP (Operator Panel), or S7 Basic.

```pascal
// Cli_SetConnectionType function added.
// For a Client it's possible to connect to a PLC as PG/OP/S7 Basic.
```

--------------------------------

### Snap7 Client Ping Timeout

Source: https://github.com/davenardella/snap7/blob/main/HISTORY.txt

The Snap7 client can now disable ping by passing 0 as the PingTimeout value to the SetParam function. This is beneficial when accessing a PLC over the internet or when a firewall blocks ICMP packets. Note that this functionality is currently only supported on Windows due to differences in Unix smart-connect mechanisms.

```C++
// Disable ping by setting PingTimeout to 0
// client.SetParam(SET_PARAM_TIMEOUT, 0);
```

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