Hi guys, I see that many node developers calls Python from Node-Red. But JavaScript has the possibilities to call C++ functions directly. Some parts of JavaScript are written in C++. This has advantages and disadvantages for node developer. But if you familiar with C++, this make easy to write …

For an example you could just show how to write a node that returns the current time, for example, where the time itself is provided via C++. But you say already have nodes that call C++, so you could just show one of those.

Hi Colin, thanks for suggestion. This was my plan in next level. Ok I start with easy examples.

Hi @iiot2k , Very interesting. Looking forward to read your instructions!! Have been experimenting recently to draw lines and (filled) polygons on images from my IP cams. But using Javascript this was horrible slow. So at the end I gave up. But I assume c++ is much faster for such use cases, si…

I started writing the instruction document. But it takes little time. If finished. I give the link.

Many thanks for contributing to the community.

Hi, I see that other Node-Red user don't give suggestions for examples. Therefore I select for hardware max7219 led driver example in C++ with call from Node-Red. Later we can use the C++ interface of SQLite for using with Node-Red.

[image] iiot2k: I select for hardware max7219 led driver The problem with that is that very few, if any, here will be able to try it out, as we don't have the hardware.

Hi Colin, this is an very cheap module and anywhere aviable. You can connect modules in series for more digits. The interface is spi. [max7219] But if this module not easy to get, we can select an other hardware.

[image] iiot2k: we can select an other hardware. To show the principle of interfacing node-red with C++ a non-hardware problem would be better. Something that can be installed and tested on any node-red system. Even just a Hello World example where the text is generated in C++. The importa…

[image] iiot2k: other hardware I agree with Colin that the better option would not start with a hardware project since by no means everyone using Node-RED uses it with IoT hardware. However, having said that, better to have an example than no example.

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Call C++ from Node-Red, suggestion for examples ? :)

Developing Nodes

iiot2k 27 August 2022 07:45 18

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Call C++ from Node-Red, suggestion for examples ? :)

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