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Hi all,
I would like to know the maximum memory size available if I want to create files with the Lua functions "io.open/write".
Then, in what default directory will these files be created, and how can I specify another one?
Thank's in advance fior your help.
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Please explain what are you trying to do and what kind of data do you want to write into these files.
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I want to save, in a simple way, in a file, (without sql for example) the variations of values of objects of type "string".
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What is the purpose of this, what do you want to do with this file?
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to use it as a log file I can link to an e-mail for example.
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Why don't you use storage?
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Ctrl+F5
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because i have a lot of small strings to record :
12 shorts strings even 10 seconds, during 30 days...
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If each string is 20 bytes long then your whole log will be at least 60MB in size. Most probably you won't be able to send that using e-mail.
As for writing into files you should not write to SD card often as it can quickly kill it. One solution is to write to a temporary file then move it to SD by the end of the day by using a scheduled script. There's a slight disadvantage that this file can be lost if the device is rebooted. You should also take care of deleting old log files.
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Ok, thanks for the reply on the file size: I will therefore only send the useful records by e-mail (error reports in my case), after the complete file.
The SD card you are talking about is internal to the LM?
If yes :
I was just thinking of using a USB key to save the log file, to avoid using too much internal memory.
Do you have an example script that copies a file to an USB key (I don't know this point on LM)?
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02.04.2020, 14:08
(This post was last modified: 02.04.2020, 14:09 by SigmaTec.)
ok, many thank's, I will try this.
Do you think it would be better for me to use an SQL database for recording my data?
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Depends on what kind of data you want to record. "shorts strings" does not say much.
