esp-idf | Espressif IoT Development Framework

Currently I'm working on a Demo program to better understand working with FreeRTOS. Therefore I would like to try to initialize a Queue on my second core(core1). After initializing i would like to add something to it in a 1 second interval and whenever nothing happens I would like to check my queue and work its content off. Everything related to that queue should work on the second core. The reason being that I previously worked on a Webserver which operates on the main core. My future Queue is supposed to work in parallel on the second core.

This is my current demoprogram:

I'm writing a webserver for an ESP32, written primarily in C and using platformio and ESP-IDF on VSCode. With a single client, the server works great, but as soon as I try to load a page on more than 1 device (doesn't matter if all the same page or different), everything slows to a crawl. I can see the page requests arriving on the server nice and snappily, but the pages won't load/be sent for up to a minute.

When this is happening, the server seems to favour an arbitrary device; my android phone, for example, will load pages at normal speeds while my PC and iPhone will be stuck, or on another occasion the PC will be loading fast and the other two devices stuck. This makes me wonder if it's related to my server/socket handling task, but ESP-IDF is such a tangled web of dependencies I'm not sure where to begin looking. I've made a post on the Espressif forum, but haven't had any responses yet. It's not the wifi connection alone, as if I connect all 3 devices but only access the webpages from one, that device still loads everything fine.

Updates:

07/02 - I'm more and more convinced that the culprit is the socket task, as it doesn't seem to allow for multiple sockets simultaneously; after accepting one it handles everything for that one socket before looping back and accepting another one.

08/02 - I modified tcp_server_task to start a new task for each socket (below is now the modified function and additional task), but this if anything made things worse, leaving me more confused than before.

09/02 - I tried increasing the backlog argument of listen() from 1 to 32, this also made no difference.

Attempted (failed) solutions now include:

• Setting keepAlive to 0

• changing dest_addr_ip4 from INADDR_ANY to 192.168.4.1, the desired address for devices to connect to

• pinning the socket handling task to a different core to the tcp_server_task

• adding vTaskDelay(pdMS_TO_TICKS(x)) at various points with various values of x

Stuck devices are still consistently loading simultaneously after however long it takes (usually 30 to 60 seconds, sometimes longer)

10/02 - I forgot to mention, the ESP has bluetooth enabled as well, as we want users to be able to control stuff over both wireless methods.

socket handling task(s):

I'm using ESP-IDF 4.3.2 to create an ESP32 project with the following command:

idf.py create-project --path test test

I then modify main/main.c to contain the following code:

I am attempting to send camera frames to a web socket server from an ESP32 with a camera. I am using the ESP-IDF to implement the client web socket on the device. Specifically, I am using: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/protocols/esp_websocket_client.html.

I have noticed an issue where the server does not receive full frames from the device. I did some digging, read through RFC6455 and became aware of the concept of frame fragmentation. My thinking now is that the camera frames (640 x 480 pixels) need to be fragmented before being sent. I read through the ESP-IDF docs and only saw one mention of fragmentation.

I feel comfortable enough to implement it myself, but it seems that there is no way to set the FIN bit, OPCODE, or any other parameters of the header described by RFC6455 using the ESP-IDF web socket client library.

Does any one have any idea how these parameters can be set, or if there is some way to enable native frame fragmentation on the device?

I am working on the esp-idf as submodule for my development and I have also integrated Jenkins for the same. It is running perfectly without shallow clone feature added over Jenkins. But, when I tried to clone submodule with shallow clone with depth 1, 5 to 10 it is throwing same error as below,

Cloning into 'platform/esp32'... fatal: reference is not a tree: 286202caa31b61c2182209f37f8069a0b60fb942 Unable to checkout '286202caa31b61c2182209f37f8069a0b60fb942' in submodule path 'SDK/platform/esp32' Failed to recurse into submodule path 'SDK'

However, it is working fine with git commands and without Jenkins.

Any help would be benefits to me.

My Jenkins setup as shown below,

I'm working on the ESP-idf via Visual Studio Code. Currently I'm working on a Webserver implementation and i would like to accept the following url:

IPADDRESS/command/on/5(number between 1 and 32)

The easiest(but not very efficient) solution would be, to initialize every single uri like this

Several of the examples in the esp-idf contain a sdkconfig.ci file (e.g. examples/bluetooth/nimble/blehr).

I understand the usage of sdkconfig.defaults but I can't find any reference to sdkconfig.ci in the Espressif build system API guide.

When should the .ci file be used and under what conditions are the configurations in it applied?

Framework:

ESP-IDF v4.3.1 - Eclipse Plugin

Project with 1 active component (my plan is to add ble scanning, mqtt messaging and wifi access)

I am using VSCode and ESP-IDF to program Arduino. Some of the Arduino library files are generating warnings such as below.