ESP32 Web Server – Display Sensor Readings – Does it update readings on it's own?

Q&A Forum › Category: ESP32 › ESP32 Web Server – Display Sensor Readings – Does it update readings on it's own?

Michael Frick asked 5 years ago

Does the ESp32 update as sensor values change or does the browser need to be updated? I put a hair dryer on my ESP32 to see if the temperature would change and it didn’t seem to update unless I updated the browser. Thanks!!

1 Answers

0 Vote Up Vote Down

Rui Santos Staff answered 5 years ago

Hello Michael,

You’re right, the values aren’t updated automatically.

However, there’s an trick that you can use… Add to your HTML web page (inside the <head>…..</head> tags the following):

<meta http-equiv="refresh" content="5" >

For example, in this web server code, you would need to after line 87: https://github.com/RuiSantosdotme/ESP32-Course/blob/master/code/WiFi_Web_Server_Sensor_Readings/WiFi_Web_Server_Sensor_Readings.ino

Something like this:

client.println("<meta http-equiv=\"refresh\" content=\"5\" >");

That will instantly refresh the web page every 5 seconds.