Hi Yves.
I think what is happening is that Google Chromes lefts one connection open and only on the second attempt, you are able to get things working.
Can you try following the suggestions in this post and see if it solves your problem: https://rntlab.com/question/solved-esp32-web-server-drops-connection-crashes/?
That explanation is for other web server example, but it can also be applied to that web server.
Regards,
Sara

Hi Sara,
Thank you so much for your answer.
I have tried your suggestion but unfortunately it doesn’t work.
I have tried with Opera , same issue.
I really thing that the problem lies in the code.
When I trie your WiFi_Wen_Server_Relays everything works like a charm whatever the internet explorer.
After checking the code difference I think the issue is in this part, that to be honest I don’t understand (you haven’t comment this part of code). Can you quickly explain it to me ?
client.println(“<script> function setMode(value) { var xhr = new XMLHttpRequest();”);
client.println(“xhr.open(‘GET’, \”/?mode=\” + value + \”&\”, true);”);
client.println(“xhr.send(); location.reload(true); } “);
client.println(“function setTimer(value) { var xhr = new XMLHttpRequest();”);
client.println(“xhr.open(‘GET’, \”/?timer=\” + value + \”&\”, true);”);
client.println(“xhr.send(); location.reload(true); } “);
client.println(“function setThreshold(value) { var xhr = new XMLHttpRequest();”);
client.println(“xhr.open(‘GET’, \”/?ldrthreshold=\” + value + \”&\”, true);”);
client.println(“xhr.send(); location.reload(true); } “);
client.println(“function outputOn() { var xhr = new XMLHttpRequest();”);
client.println(“xhr.open(‘GET’, \”/?state=on\”, true);”);
client.println(“xhr.send(); location.reload(true); } “);
client.println(“function outputOff() { var xhr = new XMLHttpRequest();”);
client.println(“xhr.open(‘GET’, \”/?state=off\”, true);”);
client.println(“xhr.send(); location.reload(true); } “);
client.println(“function updateSensorReadings() { var xhr = new XMLHttpRequest();”);
client.println(“xhr.open(‘GET’, \”/?sensor\”, true);”);
client.println(“xhr.send(); location.reload(true); }</script></body></html>”);
Thank you so much for your support.
Yves
 
 
 

Hi Yves,

Sara sent you a very detailed reply on your other post “Project 1 : need somme help to understand !“. Maybe it would be better not to multiply posts that deal with the same subject 😉

Hi Yves.
I’ve tested the example again, and it is not working appropriately. It was working fine in the past.
What is happening is that the ESP32 is trying to update the state and reloading the page and the same time, which is causing the issues.
You were right, the issue was on those lines. You can check a working version of the code here: https://github.com/RuiSantosdotme/ESP32-Course/blob/master/code/ESP32_WiFi_Multisensor/ESP32_WiFi_Multisensor.ino
Now, you need to wait 1.5 seconds until the webpage uploads. This ensures that we don’t miss requests.
Thanks for pointing that issue.
Regards,
Sara
 
 

Hi Sara,
First of all thank you for your quick response!
I tried the new code, and everything works fine. Well done !!!!
On the other hand I would like to apologize for having opened 2 posts for the same subject (thank you for pointing it Stéphane).
I just saw your explanation of the Javascript code and it is now perfectly clear to me.
Your support is fantastic and your books very educational!
I will finish my temperature and humidity regulation project and as soon as I finish it I will send you some pictures and the code!
Sincerely.
Yves

Hi Yves.
I’m glad it is working now.
No need to apologize. But, next time try to keep everything related to the same subject on the same question. Otherwise, it is difficult for us to keep track of everything.
Thank you for your nice feedback! I’m really happy that you like our resources 😀
And don’t forget to share your project when it’s finished.
Regards,
Sara