Timing capabilities UNO, RTC, Ethernet Advice Please
hi.
i tackle project need send time stamp on ethernet terminal when controller receives event input on i/o.
the hope 1ms resolution , asking guys experts @ arduino process timing if possible, or go 1/100 sec.
of course rtc of resolution needed.
the idea of going due not out of question either, thought i'd try here before appearing double in due section of forum.
tom......
(no don't have circuit diagram, gnds connected..
)
i tackle project need send time stamp on ethernet terminal when controller receives event input on i/o.
the hope 1ms resolution , asking guys experts @ arduino process timing if possible, or go 1/100 sec.
of course rtc of resolution needed.
the idea of going due not out of question either, thought i'd try here before appearing double in due section of forum.
tom......
(no don't have circuit diagram, gnds connected..
)
why need 1ms resolution ? sending on ethernet lot slower 1ms.
the normal rtc modules not accurate after hour.
do know rtc accuracy ?
perhaps have use 1khz output of rtc , connect input of 16-bit timer of microcontroller (the atmega chip on arduino board).
does timestamp have accurate arduino board itself, or other devices ?
if time has accurate example outside, not know how match arduino external time.
what if allowed have 2ms resolution ? if case, use timing of arduino. tune crystal capacitors of few pf, , keep crystal @ same temperature pid controlled heater. timestamp millis() function.
the normal rtc modules not accurate after hour.
do know rtc accuracy ?
perhaps have use 1khz output of rtc , connect input of 16-bit timer of microcontroller (the atmega chip on arduino board).
does timestamp have accurate arduino board itself, or other devices ?
if time has accurate example outside, not know how match arduino external time.
what if allowed have 2ms resolution ? if case, use timing of arduino. tune crystal capacitors of few pf, , keep crystal @ same temperature pid controlled heater. timestamp millis() function.
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