ESP32 Technical Tutorials: Tasks and concurrent Sockets

[@saeedariankia]

Thank you very much for your tutorial bro, you are really expert and thanks for the book that you have prepared for ESP32

[@cad3175]

..very good and thank you very much, the esp32 users are lucky to have you :)

[@kolban1]

Very kind sir ... very kind and appreciated.

[@gael5773]

really good little lesson, in my case to refresh the memory

[@Olfox2]

Thanks Kolban, you are so crystal clear it's really the first time i see a video from an american guy that speak so clearly and where there is intermediate summury to really nicely follow the subject. I'm almost ready to start FreeRtos ( just need to follow the tutorial instaling Eclipse ...) . Thank you very much !!!!!!

[@gregstewart1990]

Great video. This video explains so clearly how to properly use sockets with threads.

[@kolban1]

Thank you kind sir ... hoping to make more videos as time goes by.

[@davidreidguru]

I know this is a couple of years old, but I'm loving this stuff (and your eBook over on LeanPub). I've gotten into the ESP32 on Arduino, and now feel like working 'up' to the 'less automated' methods of programming .. looking forward to making it all the way through your tutorials :) Cheers !

[@crckdns]

Perfect and simple explanation about tasks in rtos. Great!

[@pcbreflux]

Hi, exellent explaination. Reminds me of W. Richard Stevens but leveled up to RTOS on the ESP32. Thank you.

[@dinakrishnamoharana6494]

Your Tutorials are excellent

[@Jindraxx20]

Thank you for the video mr.Kolban.

[@SandeepSolankis]

Awesome tutorial ! Thanks a lot !

[@DrGreenGiant]

Brilliant video, thank you!

[@peut]

Very clearly explained, thanks! However, I still have a few questions: How many tasks will maximally run in parallel in your example? 5? Will the 6th client block until one of the tasks ended? Or will it wait longer due to tcp timeouts? At what number of tasks will the ESP32 choke or stop responding , did you try, or is there a hardcoded limit?

[@kolban1]

Howdy Jose, I try and get good folks like yourself to push questions through the ESP32 forums. There are smarter folks than me who will be able to assist. esp32.com/index.php From a tasks perspective, I don't believe there is an inherent limit on the number of tasks that can be spawned. As long as you have RAM resources for a big enough stack, you can keep creating tasks and everyone should be happy. As you have more tasks and each is eligible to run, we will find that the frequency with which they are given the limited number of CPUs will decrease as you will be spreading a finite resource (CPU) thinner across the tasks. From a TCP/IP sockets perspective, when we configure the ESP-IDF framework, we define the maximum number of socket connections we may have. The maximum configurable at present is 16. At the Sockets API layer ... the listen() API (which is not ESP-32 specific) specifies how many socket connections can be received before they are handed off in an accept call. If we code "5", then we can receive 5 concurrent socket client connects (maximum) before calling "accept" if we fail to call accept fast enough and a 6th connect request arrives before an accept, then that 6th call will be rejected and the originator informed.

[@peut]

Thanks again for your insight Neil!

[@joealsubash4733]

Hi, thanks for the great tutorial. I was wondering how your laptop is connected to the ESP32 for the socket programming? Are they both connected to the same wifi router? Thanks.

[@artbecker5618]

Thank you for another video.

[@ianmichaeljames]

Hi, just wondered if you have done or know of a video that demonstrates a web socket and a web server in the same project?

[@juan_fe]

Hi ! Did you tried with socket io ussing GSM?

[@useyourbrain2022]

very well explained!! tanks

[@giannismanousaridis4010]

where can I find the code ?

[@paulferreira1441]

Hi Neil, you dont have a video of using the ESP32 as a client and connecting to an ASp server do you?

[@kolban1]

It might be that you could use the CURL technology? I think there is a video for that.

[@paulferreira1441]

Thanks Neil!!!!

[@claytonsulivan]

How to make Socket Server communication between two ESP32?

[@GfastGao]

Super clear video! As a intermediate C/C++ developer, I'd very like to know if FreeRTOS support multi-core CPU? ps: I know this question is very supposedly too generic. Perhapse the question is: How to programm Software in FreeRTOS more thread-safe :D Thanks!

[@GfastGao]

Today I've checkout how this works in code. I just love it more then only see it. It's so COOL! It enlight me for the job to port "open62541" project (OPC UA protocal for industrial M2M communications) to this plantform!! Thanks again. P.S: Please do more video about these advanced topics! It just helps more.

[@orparga140]

The code: github.com/nkolban/esp32-snippets/tree/master/sockets Congratulations. All your tutorials and books are very helpful and are explained in a very friendly and comprehensive way.

[@bolee4141]

HI,thx for your vidieo and book,it's help me a lot ,but now i have something in puzzle,how can i call the socket_server_task in freeRTOS's main(),could you please show me a example ？

[@youliantroyanov2941]

kolban ftw. ducktape ftw.