MICROFORUM

I don't know what the display is for, but the clock has the advantage of generating its own data. When the MCU will be getting data from somewhere else, such as over a serial line, it will have to stop the multiplex display on every interrupt. The display will then be dead. You will have to include ...

set up two local servers, one with PHP 5, the other with PHP 7. Set each localhost to connect to another LocalHost with a different PHP version. Write the code in the old php version, so it would be possible to call it in the new php version. This is how you can migrate data step by step. There are ...

here is an example of a 6x 14 segment display with arduino. They also have a digital clock program there.
http://timewitharduino.blogspot.com/201 ... x6955.html