====== Programming with the Use of Scripts ======
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Several programming models for IoT script programming are available. Depending on the hardware model used (SoC or OS-based MCU), it may involve single script execution (e.g. Raspberry Pi Pico RP2040, Edge-class IoT) or multithreaded, parallel, multiple scripts, doing multiple tasks (e.g. Raspberry Pi 4, Fog-class IoT). The idea and model of the scripting programming for SoC class devices (edge) were presented in the chapter [[en:iot-open:introductiontoembeddedprogramming2|Script Programming with Middleware]].\\ In the case of far more powerful, Fog-class IoT devices that are OS-based devices, a variety of programming languages and, thus, scripting interpreters are available.

Among others, the most common scripting languages for fog class devices are :
  * Bash scripting (OS command scripting) usually does not provide support for the GPIO, intended to automate OS tasks,
  * Python scripting, cross-platform for both Edge-class devices (Micrpython) and Fog-class (regular Python, usually run on Linux),
  * C#, limited to the Windows IoT for Raspberry Pi.

=== Bash scripting ===
As Bash scripting is well covered by many manuals for Linux, in the following chapters, we focus on two others: Python and C#. Moreover, accessing the GPIO in the case of the bash requires installing external tools; thus, it does not apply to IoT programming straightforwardly but rather as a supplementary tool to automate tasks other than core programming.
=== Python ===
Python programming for IoT devices is dual:
  * Regular Python interpreter can be used in Fog class devices such as Raspberry Pi and its clones. In this case, the Python interpreter is run as a separate process in the Linux OS, the same way as in regular PCs. It has full access to the GPIO, however. 
  * Micropython is dedicated to SoCs and is distributed as the firmware that must be flashed into the device. Commonly, Micropython exposes serial communication on dedicated pins, exposing a Python console that looks similar to the command line Python interface in the PCs
=== C# .NET ===
When writing this publication, the .NET framework with C# interpreter is available only for Raspberry Pi devices as a part of the Windows IoT operating system ((https://dotnet.microsoft.com/en-us/apps/iot)). It is a niche, still fully functional and solid solution. Its newer versions are available only as a commercial product, however. 
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In the following chapters there is a brief introduction to programming with scripts for IoT devices in Python and C#:
  * [[en:iot-open:scriptingprogramming:pythonfundamentals]],
  * [[en:iot-open:getting_familiar_with_your_hardware_rtu_itmo_sut:raspberrypi_rpi:programming_fundamentals_winiot]].
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