long term hardware support

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i looking build synchronized wall clocks arduino. need choosing hardware. use several different correction schemes, simplest voltage applied set time tells microprocessor set time.

another correction rs485 input sets clock same time desktop computer.

i want ntp correction option of poe.

yet lower priority wireless correction wifi, zigbee, or protocol.

i use hardware has ethernet/poe built in avoid development cost.

the clock drives 4 6 digit 7 segment led display.

thanks looking.

not sure question is. want 1 design you?


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