Arduino variables loaded from SD card

Question

I am trying to load some variables from an SD card on the start up of my arduino Uno. I have been given some advice but am unable to communicate at the same hours. Using this advice, I have the following edited code, but it doesn't work and I believe that it's my implementation that is the problem. All help would be greatly appreciated.

myFile = SD.open("test.txt", FILE_READ);
 if (myFile) {
 while (myFile.available()) {
 myFile.read();
 km = myFile.parseInt();
 kmTemp = myFile.parseFloat();
 kmrevs = myFile.parseInt();
 miles = myFile.parseInt();
 milesTemp = myFile.parseFloat();
 milesrevs = myFile.parseInt();
 }
 myFile.close();
 }
 else {
 Serial.println("Read Error");
 }

• chrisl: How is it not working? Describe further. And what is actually written in the file you want to read?
• user4163554: The program gathers/calculates 6 pieces of data which is then saved to a text file on an SD card. The text file displays the 6 pieces of data in a vertical list. On power up of the arduino, I am trying to make the program read these 6 bits of data, assigning the values to 6 different variables before the program hits the loop (this script is within setup() if that eliminates a question).
• user4163554: When ran and then restarted the data output is at the programs defaults of '0' & '0.000000' where floats apply....not the data that is saved on the disk.
• st2000: You still have not listed the file from your SDCard. Make sure you are using a plain text editor for this. For example, Microsoft Word or Adobe Framemaker would add an unbelievable amount of overhead that would confuse the parsing library.
• Gerben: what is actually written in the file you want to read? please answer this question.

Answer 1

in you previous question, where I answered, you had no commas or new-lines in the example file content. the parseInt and parseFloat ignores only spaces by default.

remove the commas or read them or ignore them with parseInt parameter SKIP_ALL

km = myFile.parseInt(SKIP_ALL);

• user4163554: Hi there is no commas, it's just in the comments section, whenever I press enter it posts the message instead of starts a new line....so I used commas to seperate the different data.
• user4163554: Hi Juraj. I have to admit, I have never analysed anything as much as your two answers. I feel that my bank holiday was no longer wasted as I have finally worked out what you meant. All is rolling amazingly now and it's just what I wanted. Thank you.