I'm trying to use the CH376msc library by György Kovács (https://github.com/djuseeq/Ch376msc) to read data from a CSV file on a USB stick. However, when I attempt to read the file, all I get is gibberish. I have checked, and put the CSV file in Unicode (UTF-8) format.
I do not believe this is a hardware issue, as the example code from the library runs without issues on the same setup.
Below is the sample sketch I'm trying to use to read the data:
#include <SoftwareSerial.h>
#include <Ch376msc.h>
SoftwareSerial stickSerial(6, 5); //6 is RX, 5 is TX on Arduino - so 5 to RX on CH376 and 6 to TX on CH376
Ch376msc stickReader(stickSerial);
int numTries = 0;
void setup() {
Serial.begin(9600); //Initialise serial to talk to serial monitor
stickSerial.begin(9600); //Initialise serial to talk to USB stick
stickReader.init();
delay(500);
loadCalibration();
}
void loop() {
// put your main code here, to run repeatedly:
if (stickReader.checkIntMessage()) {
if (stickReader.getDeviceStatus()) {
Serial.println("Flash drive ready.");
Serial.println(numTries);
loadCalibration();
} else {
Serial.println("No flash drive detected.");
}
}
numTries++;
}
void loadCalibration() {
//This will load the calibration data from a CSV file and display it on serial. If no USB drive is detected,
// it will just end. It will load one line of the CSV file at a time.
char trackBuf[6]; //Buffer to hold the track identifier (loco ID)
char magClaiBuf[6]; //Buffer to hold the calibration value for magnet end
char noMagCaliBuf[6]; //Buffer to hold calibration value for non-magnet end
//If we get to this point, we've got a functional USB drive
Serial.println("loadCalibration called");
stickReader.setFileName("CALIB.TXT");
Serial.print("file opened: ");
Serial.println(stickReader.openFile(),HEX);
while (true) { //Set to 'true' for testing purposes
//Continue as long as there is data in the file
stickReader.readFileUntil(',', trackBuf, sizeof(trackBuf)); //Read first field
stickReader.readFileUntil(',', magClaiBuf, sizeof(magClaiBuf)); //Read second field
stickReader.readFileUntil('\n', noMagCaliBuf, sizeof(noMagCaliBuf)); //Read third field - ends with newline
//Data is read in and being held - now just need to process it
Serial.print("Loco ID: ");
Serial.println(trackBuf);
Serial.print("Magnet end: ");
Serial.println(magClaiBuf);
Serial.print("Non-magent end: ");
Serial.println(noMagCaliBuf);
Serial.println("****");
}
}
The CSV file was made in OpenOffice, and is as follows:
1,31,2077
2810,1486,3545
2805,1743,3801
2809,2018,4076
2807,2250,215
2811,2450,420
2803,2726,690
2808,2964,928
2814,3212,1174
2806,3455,1410
2802,3658,1614
2801,3908,1859
2812,309,2352
-1,1222,3274
I have taken the following steps to troubleshoot so far:
- Ensured the CSV file is in UTF-8 encoding
- Formatted the flash drive
- Put the filename in all caps (as per a discussion on the Github post)
- Tried with a .TXT extension as well as .CSV
None of these options have worked, they just produce output like this:
6:24:51.464 -> loadCalibration called
16:24:51.510 -> file opened: 0
16:24:51.510 -> Loco ID: ⸮⸮ۻ⸮⸮⸮⸮^{⸮Mݶ⸮
16:24:51.557 -> Magnet end: ⸮
16:24:51.557 -> Non-magent end:
16:24:51.604 -> ****
16:24:51.604 -> Loco ID: ⸮⸮ۻ⸮⸮⸮⸮^{⸮Mݶ⸮
16:24:51.651 -> Magnet end: ⸮
16:24:51.651 -> Non-magent end:
16:24:51.651 -> ****
16:24:51.698 -> Loco ID: ⸮⸮ۻ⸮⸮⸮⸮^{⸮Mݶ⸮
16:24:51.698 -> Magnet end: ⸮
What am I missing?