Need to know the time - accurately for your next project?
The code below allows your PIC to log into a network timeserver and it (eventually) writes the time to a Dallas RTC (code not supplied).
The PIC checks the NET TIME every power-up and thereafter every 4 hours. If it doesn't make connection, it tries an alternate time server. If THAT doesn't work (after retries) it gives up and tries again 4 hours later. A Lantronix XPort handles the connection to the net.
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Re: Charlie-plexing
Sorry, I took a break for a few years and didn't see this post.
Demon Today, 04:40At first glance, your grid does look functionally like my leaning pyramid.
It's weird, your design looks more confusing to me. :D