Michael Reisch asked 6 months ago
Hello Sara,
I´m working at the moment the WebServers course to get a deeper look in html. So I´m working at the WiFi-Manager and have several problems.
- SUBMIT Button in wifimanager.html did not work, I think the problem is a missing script.js file. wifimanager.html line 31 addresses a script.js file. Can you show me what content should be in that script file?
- Very often when I restart the ESP32 it can not connect to my network, it starts then in AccessPoint method. But my network credentials shown in the Serial monitor was correct.
Thanks for your help, best regards
Michael
Sara Santos Staff answered 6 months ago
Hi.
You probably didn’t upload that file to the filesystem… is that script.js file in your data folder?
Are you sure the credentials are correct? Please note that extra spaces, uppercase, and lowercase also matter.
Regards,
Sara
Michael Reisch answered 6 months ago
Hi Sara,
sorry about my late answer. I found the problem, there was a blank at the end of my ssid. When I enter the ssid on my iPhone and use the text completion then this adds a blank.
It works fine now!
best regards
Michael
Sara Santos Staff answered 6 months ago
Great.
I’m glad you found the issue.
I’ll mark this issue as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara
Bernie answered 5 months ago
Hi Sara, I find <Wifi.h> (WiFiClient, WiFiServer, WebServer classes) to be rather unreliable in addition to being bulky and memory hugging. Does your book describe a different hopefully minimalist webserver that is reliable?
About 20% of the time, I do not get a response from the server, and sometimes I get a response that is 30 seconds delayed. Often the webserver just disappears while everything else is working.
On the other hand, I have had good results with HTTPUpdateServer (its GUI is bad).
Thanks
Sara Santos Staff answered 5 months ago
Hi.
In the eBook, we use the ESPAsyncWebServer.
It works reliably for all the examples we tested.
Regards,
Sara
Bernie answered 5 months ago
Is there a minimalist web server anywhere in the library or on GitHub? The server does not need to be async or handle more than one client. And it should be connectionless.
What is the lowest level class that sends a block of data to the WiFi device via http? Should not be difficult to write a minimalist http server?
Thanks
Sara Santos Staff answered 5 months ago
In your Arduino IDE, after selecting an ESP32 board, go to File > Examples > WebServer and you’ll get several options for web servers using the most basic web server library included with the ESP32 core.
We also have this tutorial using a more minimalist approach but doesn’t work as well as the async web servers: https://randomnerdtutorials.com/esp32-web-server-arduino-ide/
Regards,
Sara
Bernie answered 5 months ago
Hi Sara, all the examples on the IDE use WiFi.h.
Comparing a compile of a null sketch (null setup + null loop) on an ESP-32 DevKit V1 with one that includes WiFi.h plus a WiFiClient and a WiFiServer object, the WiFi code uses 45% (585 KB) of extra flash memory! Clearly WiFi.h is suboptimal.
https://randomnerdtutorials.com/esp32-web-server-arduino-ide/ also uses WFi.h.
Bernie
Bernie answered 5 months ago
Sara do you have a course or tutorial for figuring out the memory structure, mapping, and partitions, internal/external memory, integrated memory, QSPI memory of an ESP32-S3? The S3 is supposed to have 4 MB of integrated flash, 520 KB of SRAM, but we only get 1.34 MB of flash and 320 KB of SRAM? What gives?
Also what is in the ROM and where is the kernel and the OS? How does download work?
Sara Santos Staff answered 5 months ago
Hi.
Thanks for your interest in those subjects.
Unfortunately, we don’t have any resources about those specific subjects.
Regards,
Sara