I have a mega2560 board with wiznet w5100 shield. I am reading 6 temp sensor values and sending to internet and saving to sd card. 1.
Problem is after a year I have realised there is arround 20 minutes differencies to the real time.
I am using "Rtc_Pcf8563 rtc; " to initiate real time clock.
Can you please help me how can I synchronise the real time? It is on LAN, so maybe NTP protocoll would be ok? Is there a solution fot this? I am not a big coder
In case of a power failure the board is not starting up...Sketch is not running. I am using DC power supply 9V. But in case i am pulling out the power directly from the board and put back after some minutes, it is starting in a normal way...
What can I do?