![]() We recommend that you follow all the steps in this tutorial to understand how ElegantOTA works and how you can use it in your projects. Upload files to SPIFFS via OTA to ESP32 board.Upload new firmware via OTA to ESP32 board.Add the ElegantOTA feature to your ESP32 web server.We have a similar tutorial for the ESP8266 NodeMCU board: ESP8266 NodeMCU OTA (Over-the-Air) Updates – AsyncElegantOTA (VS Code + PlatformIO) Overview Recommended reading: Getting Started with VS Code and PlatformIO IDE for ESP32 and ESP8266 You can mix and match these plugins, and write your own.By the end of this tutorial, you’ll be able to easily add OTA capabilities to your web server projects with the ESP32 to upload new firmware and files to the filesystem wirelessly in the future. There are over a thousand POE related modules on CPAN, which is a testament to its pluggability. POE::Component::Server::DNS - to write your own DNS server.POE::Component::OSCAR - communicate to AOL IM service.POE::Component::Client::opentick - financial data retrieval.POE::Component::EasyDBI - non-blocking DBI interface.It will utilise an underlying multiplexing function like epoll(), select() or a Gtk/Glib event loop to implement an interface to easily write multiplexed code.Īlong with being a well designed, extensible framework, there are already a plethora of existing plugins which can run through the POE kernel: POE - portable multitasking and networking frameworkPOE is an excellent multiplexed asynchronous I/O event framework used to implement concurrency in a single execution pipeline. The technique I prefer has an event loop which takes in a list from each drink from the Thread:Queue: the first element is the command, the second is the parameter object (which is usually an arrayref or hashref), and the third is a Thread::Queue to send the return value to: Thread::QueueMost threaded programs break down into a boss-worker model, or a thread-pool model where threads will sit in a loop, waiting for events & processing them as they come. The same rules apply here as they apply to the kind of variable your blessing: the things you put in the container must also be shareable, or your thread will crash. To make your blessed object reference shareable, the underlying variable must be shared. Making your blessed object references shareable However, if you assign something that is not shareable, your thread will crash. Hashes and arrays are shareable, and assignments into their contents are automatically shared. ![]() References to subroutines (coderefs), however, are generated as soon as they are made, and are not shareable. Subroutines are shared amongst all threads from the CODE section of the process. Suffice to say, it's wise to use the latest 5.8 interpreter, or 5.10 if available. Because it's been the road less travelled (in favour of forking or asynchronous multiplexed I/O), there have been a number of related bugs which have taken longer to fix in both the Perl interpreter itself, and XS modules which don't implement re-entrant functions. The current threading interface, ithreads, was introduced in 5.8. Threading in PerlThe current threading interface in perl, ithreads, is very useful, but it has a number of caveats and key differences from what you may be expecting from experience in other programming languages.ĬomplicationsThe principle roadblock to general adoption into the Perl programming repertoire over the years is the relative instability of the threading interface. The speed of reverse-caching proxies like Varnish are a prime example. There is no reason why the two techniques cannot be combined. Naturally if you CPU bound, and wish to take advantage of multiple processors, the move to the first two options is required. ![]() In a single-processor environment, this is by far the most efficient way of doing these kinds of tasks. ![]()
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