ESP32 | Arduino sketches for the ESP32

I have a ESP32 configured as webserver. I have multiple webpages, that I include as files

for example index.h

Started to develop a wiresless 'cable' solution (with websockets) between two ESPs, a wireless serial 'cable' between computer and a serial device to mimick a direct wired connection. Was working great however just accidentally fried one of the ESPs (short a serial cable connection to higher voltage - sigh) when testing. Replaced one of the ESP32s with an ESP8266. Suspect this should work however it did not.

The problem is the ESP8266 (client) cannot find the network of the ESP32 (server). Why it doesn't work? My computer can see the server and can connect. Fried ESP32 the same, no problem.

Tried the WiFiScan demo on the ESP8266 and can detect all other WiFi SSIDs/MACs in neighborhood however cannot detect the ESP32 server it's SSID/MAC.

Why it doesn't work? What is the difference and how can I solve this?

ESP32 - code of the server

I need to program a ESP32 to act as webserver and have 2 simple pages.

The first one should contain a form that the user has to fill in. (one text box, one dropdown and one checkbox.) The form has a submit button, and when it is pressed, the values are written to the ESP32, and a new page is presented. This new page will the update its content dynamically via AJAX calls.

I've found and seen countless tutorials and managed to make the second AJAX page that updates on its own without refreshing. I am not able to undertand tough how I can make the / root page with the form to submit its data, AND to forward to the second page.

So basically the questions are 3:

1. how can i have more than one page on a ESP32?
2. how can I submit a form so that the values get stored in variables on the ESP?
3. how can the submit button forward to the next page?

Thank you

-----EDIT:------

I found an answer to questions 1 and 3 with this sample: https://www.arduinoslovakia.eu/blog/2019/4/esp8266---http-server-s-viac-strankami?lang=en

question 2 is still open tough. Thank you!

I started several attempts to get this complex working. As mentioned in so many other discussions the micropython modules are not recognized, e.g. machine. Python modules like numpy were also not found.

I think, the python environment is not working correctly and the modules are there but not found. But, there is no recommendation or tutorial that really solves this. How can I set this up?

What I did so far:

1. manually installed all components according to tutorials

2. another way: installed the pything coding pack which contains a lot of stuff.

3. The Windows paths have the correct folder paths to the components.

4. I set the obviously correct python interpreter in vscode

5. connection/communication with board is working. I can set up codes which dont contain micropython modules.

6. in other IDE's like thonny/mu the modules are found.

7. I also installed a python venv: I could install numpy inside this venv and later it was found in vscode (wasn't found before) when I used the venv python as interpreter in vscode. But I wasn't succesful with micropython in venv.

PS: I can use the micropython modules like machine or network and upload the sketch to the esp32 board. It is working on the board. But I cant run any of the sketches in vscode. I think that Vscode uses cpython instead of micropython but shouldn't this be working after the installations I mentioned?

Hi I'm trying to get this code block to run in the mainline of one of the examples provided with ESP-IDF (denoted by arrows)

While experimenting with a UDP server that runs on esp32, I found that the size of the received packet is limited to 1500 bytes: 20 (IP header) + 8 (UDP header) + 1472 (data), (although in theory UDP as if can support packets data up to 64K). This means that in order to transfer a larger amount of data, the client must split it into several chunks and send them one after the other, and on the server side, this data will need to be restored. I think that the overhead of such a solution will be quite high. I also know that TOIT provides TCP/IP connection. Naturally, the packet size is also limited in the case of TCP/IP. This is 64K (65535 bytes). Does TOIT have any additional restrictions on the TCP/IP connection, or 64K value is fact also for TOIT?

I am learning how to control P10 Led matrix 64x32 with NodeModule MCU ESP8266, I google and found this library https://github.com/2dom/PxMatrix and this tutorial https://www.instructables.com/RGB-LED-Matrix-With-an-ESP8266/. I believed that I wire between P10 and ESP8266 in true way in the tutorial, but that P10 led does not display as the example:

The true result will be:

This is my wire diagram:

This is my code:

I have a TTGO T-CALL ESP32+Sim800L board and I want to send accelerometer data to Firebase. I am using the TinyGSM library which supports SSL/https connections for Sim800L. I am currently sending dummy data to see if it works but it is giving me a failed flag. Why is it not sending data to Firebase?

First the problem.

The user can upload file from the web with ajax. If the file is relatively big, the uploading takes a while. If the user's connection is lost or something happens during the uploading process, the file is going to be damaged or empty.

How should I secure the upload process so the file remains the same if it fails for some reason?

I'm using the following libraries on the Arduino ESP32:

• ESPAsyncWebServer
• LITTLEFS

I have a basic file upload handler on my esp32 which looks like this: