Dynamic parameters for functions and procedures in Nextion language Imagine that you have written a brilliant function for your Nextion HMI, for example the extended string functions which I offered you last week. Not, as your project moves on, you find that you need the same functions in different places

This blog has two purposes: The first is giving you a few code lines at hands for easier processing of text variables (strings). The Nextion programming language gives strlen to find the length of a string, substr to extract a part of a string at a specific position, and spstr to split a string into parts along a "separator" string. But that's it. My thought was, what if one day, someone wanted to send stringified json data over serial to the Nextion HMI and to parse that string in order to set variables from it? Then, we'd need somewhat more than what the Nextion firmware gives us. The second thought was writing about functions in general. Actually, we can write them into an event code pane of a button for manual action or a hotspot for remote action with click. Nevertheless, there is a lack of flexibility since 1) usually, the input and output fields or variables of such a function are fixed, for example t0.txt or n0.val. And 2) functions can only be executed if the page containing their container is actually loaded. There is an elegant solution with indirect addressing for 1), and we'll talk about that, next Sunday. And perhaps, I can present you with a solution for 2) already the Sunday after (hint, hint, tease, tease... 😉). But for the moment, let's concentrate on the extended string functions which come today including a demo project.

First of all, please accept my apologies for being late. This Sunday blog comes on Monday night (here in Europe) while it's "only" Monday morning in parts of the US, but already Tuesday in China. But sometimes, I try to achieve too many things at a time. And since I'm there, I think that I could quickly do this and add that to cover more topics in one blog. And if then, there is a small thing which doesn't work as expected, the whole chain stands still until the problem is solved. Now, I've everything up and running, being 24 hours late, but I can finally start writing. Please continue reading!

The Nextion Web Serial Framework moves on his path towards a full-fledged Nextion debugger and upload tool in almost any browser, without the need to install the Nextion Editor. Progress is somewhat slower that I had foreseen, but for a maximum of compatibility, I want to do everything in plain JavaScript which has become a powerful programming language, so quickly that I'm still learning to implement asynchronous functions in an efficient way with out the usual callback spaghetti code. And I have always the goal in mind that you, my users shall be able to customise it easily in case you want to host it yourself for your customers. But before all, there is an important reminder about the Nextion Summer Sale, please continue reading!

Today, there are many news and thoughts in the air. Thus, I abandoned the idea of blogging just about the new release v.0.3 of the Nextion Web Framework. So, this will be preceded by the detailed announcement of the Nextion Summer Sale, and by some of my thoughts I shared with a reader of this blog, AJ, who was worrying about the future of the Nextion Intelligent ( P ) series. But, finally, at the end, you'll find, as you probably expected, release notes and a short description of the new and/or improved functionalities of the Nextion Web Serial Framework and a link to try it out live.