SD card as a setpoint storage

Projects General Guidance
1

I hope its good place to write this, if not move it to right place
I did not write any code for arduino or any other boards or language... until tommorow :slight_smile:

I would like to use a sd card as a storage for light level setpoints.
As hardware I will like to use:
Arduino micro or other small board
SD card shield
RTC shield
LCD or OLED display to presenting values

It should work like that:
at the SD card I would like to store data of steps of light level, for exsample hh:mm v1 v2 v3 v4 v5 v6 etc
after every off/on data should be downloaded from SD card and executed.
every step will be triggered by RTC, to proper work two steps should be readed at every steps, present and and next one, differences between time and values of every step are informations haw much and how fast light will be change.
example:

  1. 12:00;000,010,020,030,100,050,...
  2. 13:00;050,100,080,060,010,075,...
    in this case changes have 60min time so,
    channel 1 will change 0,83% every minutes
    channel 2 1,5%/min
    channel 3 1%/min
    channel 3 0,5%/min
    etc...

every help, sample codes, links etc are priceless

I try to answer to every questions

good or bad comment are GOOD
KF

2

The EEPROM on the Arduino can easily store a few hundred data items, and retain it during power off. No need for any extra hardware.

3

I agree with you, the SD card in this case is for send changes to the eeprom not as a memory buffer. I would rather make "light scenes" in excell to see changes at chart, save data at SD card and then move it to eeprom after next reboot.