Sometimes it would be useful to have a function to save data to a text file.
I plan to save some of my Arduino sensor data to a text file using the
Processing language.
Ninety percent of the following code comes from this
forum posting. Thank goodness for the internet, and for people like PhiLho and Cedric. I modified their code and ended up with this (to suit my own project):
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/* =====================================================================
Project : Append data to a text file
Author : ScottC
Created : 16 Nov 2011 (Updated 26 Aug 2014)
Description : Use the Processing language to store data on
the computer. This code can be used to create a
new text file or append to an existing file.
Processing Version tested : 2.2.1
Reference: http://processing.org/discourse/yabb2/YaBB.pl?num=1251025598/4
=============================================================================== */
import java.io.BufferedWriter;
import java.io.FileWriter;
void setup(){
String myFileName = "C:/SensorData/mySensorData.txt";
String mySensorData = "10,20,30,40,50";
//To insert data into a new file
//saveData(myFileName, mySensorData, false);
//To append data to an existing file
saveData(myFileName, mySensorData, true);
}
void draw(){
}
/* --------------------------------------------------------------
SaveData:
- This code is used to create/append data to a designated file.
- fileName = the location of the output data file (String)
- newData = the data to be stored in the file (String)
- appendData = true if you want to append
= false if you want to create a new file
--------------------------------------------------------------*/
void saveData(String fileName, String newData, boolean appendData){
BufferedWriter bw = null;
try {
FileWriter fw = new FileWriter(fileName, appendData);
bw = new BufferedWriter(fw);
bw.write(newData + System.getProperty("line.separator"));
} catch (IOException e) {
} finally {
if (bw != null){
try {
bw.close();
} catch (IOException e) {}
}
}
}
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This will append the sensor data of 10,20,30,40,50 to the end of mySensorData.txt file.
If I wanted to create a new text file instead, then I would call saveData in the following way:
saveData(myFileName, mySensorData, false);
If you found this code useful, please support me here:
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