I am writing a HTML application for an Arduino-based web server using only C and C++ on the Arduino webserver and HTML only on the client web browser.
The index page is a simple form containg two radio buttons and a 'Submit' button BUT at the top of the page is the encoded day and date extracted from a real-time clock chip attached to the Arduino.
I want to re-transmit the entire page ( < 400 bytes) every 5 seconds with an updated time.
I have no trouble encoding and transmitting the encoded page the first time but thereafter the browser just sits displaying the original page with the original time, even though debugging printout from the Arduino says that it is transmitting a new page every 5 seconds.
How do I get the Arduino to tell the Browser to forget the last index page and receive a new one - using HTML only?'