Using arduino nano for some data logging, and an rtc for the clock, a hm-10 for the Bluetooth and sd card.
Does it seem feasible to record the time / date, and data to a text file, format the text file like csv, and send via Bluetooth as to be able to retrieve this data on a computer?
What would my maximum file sizes be?
Thanks!
Bluetooth can be used as a serial connection to a PC, in which case you can send any amount of text as serial data.
I think that the bigger limit to the file size is the time that you could spend transferring it by bluetooth. I never tryed myself, but I think you can easy create a 2G file , but the transfer will be long. I would create a bunch of smaller file, 1 per hour or 1 per day.
Ciao, Ale
http://forum.arduino.cc/index.php?topic=410766.0
If you are serious about what you mean by "big", It might pay to be serious about what you are recording and when you download it. Cutting it up into smaller files can be a pointless waste of time.
Oh god, I'm thinking arduino big!
Date / time / reading / some extra data, recorded adhoc, and file clusters to be one per day.
I guess the file size would be in the 10k regions, at absolute most 1mb.
I need to think how I can get the data off the arduino to the computer and I was thinking phone.
It's labourious carrying a laptop around.
10k is not big. 1Mb is 100 times bigger but not such a big problem. Read reply #3 again. You can easily check the time and use the date as the new filename at midnight.