Are you having trouble following that Unit?

Unfortunately, you add further issues that do not answer to my question. 

Can you tell me which issues you are having, so I can try to help?
Thanks!

Dear Rui,
I am referring to the issue of exposing the web server by using ngrok. I followed accurately your instructions on page 188 of your book “Learn_ESP32_with_Arduino_IDE”. To explain better myself I send you the picture of terminal.
I am using the URL: http://0.tcp.ngrok.io:15108 in my browser (Safari). Each time I send this URL I observe that the connections parameters in the terminal window change, the browser progress blue line stops in the middle and small wheel continues to spin but absolutely nothing occurs. Looking at the ngrok site I see that the procedure they utilize seems to me different from the procedure you indicated. The server works fine when in local.
I rely in your help. Thank you very much.

Daniele Gozzi

Hello Daniele,

• Can you test on Google Chrome or Firefox too? Just to see if it’s a problem with Safari.
• Can you also double-check that you’ve entered the right ESP IP address in the ngrok software?

Thanks!