Thanks so much for your prompt replies. If this question is bothersome to folks, please feel free to delete the whole thread.

Respectfully
Don

Hi.
That’s the same ESP8266 board and libraries we use.

Unfortunately, I don’t know why you’re getting the issue and needed to make those changes.

Regards,
Sara

Hi Sara

Thanks for your response. I am using an ESP8266 NodeMCU
Also I double checked the libraries which appear to be by ESP32Async.
I created a document showing my stuff…
https://github.com/DonaldPotbury/DonaldPotbury.github.io/blob/main/ESP8266%20Trouleshoot/Troubleshooting.md

Respectfully
Don

Hi.
I just tested the code and it is working as expected.
Which board are you using?
Are you using the libraries by ESP32Async?

Regards,
Sara

Thank-you for your excellent article! It was quite helpful and I learned so much.

When I paste your sketch as posted, the following exception was thrown as soon as the browser hits the page.

Exception (3):
epc1=0x4000bf64 epc2=0x00000000 epc3=0x00000000 excvaddr=0x4023f4dd depc=0x00000000

This may be due to my setup or my ignorance. But it appears that there is something going on with how index_html[] is setup.

Looking at other examples published by the author of the ESPAsyncWebServer library you are using, I made a few slight changes that seemed to work…

const char index_html[] PROGMEM = R”rawliteral(
was changed to..
static const char *index_html PROGMEM = R”rawliteral(

I added this line after the html…
static const size_t html_length = strlen_P(index_html);

Lastly I changed command in the server on “/” section.

server.on(“/”, HTTP_GET, [](AsyncWebServerRequest *request){
request->send(200, “text/html”, index_html);
});

was changed to…
server.on(“/”, HTTP_GET, [](AsyncWebServerRequest *request){
request->send(200, “text/html”, (uint8_t *)index_html, html_length);
});

Thank-you so much for this article.

Thank you Sara

Thank you Sara.

Yes.
You can continue running things in the loop.
Regards,
Sara

Thanks for your reply.
No, ESP32 is connected to my home Wi-Fi and my mobile phone is connected to its mobile network.

Thank you, Sara for the prompt reply.
Can I write some code in the loop() ? For example –
if (….. ) {digital write (…) ; }
etc ?