Hello! I am now wondering how to graph the data stored in the SD Card module. After hours of reading inputs, I want it keeps and graphed on the SD card module. I'm not sure how to create a file on the module where the graph will be placed.
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I do not quite understand the question.
Do you want to create a graph and store it on SD?
Or do you want to read back what was stored on the SD and graph it on a TFT that is connected to your Arduino.
Or do you want to read back what was stored on the SD and graph it on a PC.
Which Arduino are you using?
if you have data on an SD card in a suitable format move the card to a PC and
- plot it using gnoplot
- plot it using excel
- write a program C#, java, python, etc to read the file and plot it
I store the data in CSV format. I then import it into Libre Office Calc to graph it.
Excel, any version, is an obvious choice. You can also plot directly to it. Another option for live graphs is to send the data via Bluetooth to Android, using Bluetooth Graphics Terminal.
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