hi everyone... I tried to do a data search on the data.txt file on the Arduino SD card... but it can only be read if the data is in the first row (top), the second data and so on cannot be found... I wonder why? here is the code that I use Thank You /* SD card read/write This example sho…

it seems it's a uint32_t (an unsigned long integral number). print knows how to print it to get ASCII but that's not what you want. You want a cString representation to pass to the function ➜ you need to convert it if(wg2.available()) { char wgText[15]; // large enough to store the ASCII repres…

with CR without LF .. like this [Untitled]

or if you have a string search code in the txt file... that I can use, I would be very grateful

[image] ranggajulizar: with CR In that case your lines has 9 chars length rather than 8, so you need to read it accordingly. Do not forget to increase a length of buf array.

then to be able to read the next line too, is there a way? because if I look for the second or third data it can't be found

[image] ranggajulizar: then to be able to read the next line too, is there a way? You just need to change two lines [image] ranggajulizar: char buf[8]; // <<< change length to 9 and [image] ranggajulizar: myFile.read(buf,8); // <<< change number of read chars to 9

may be a function like this would work. (typed here, totally untested) assuming you have #include <SdFat.h> SdFat sd; File file; ... // in setup if (!sd.begin()) return false; // Initialization failed then the function could be bool findStringInFile(const char *filename, const char *searc…

Thanks Jackson, I'll try it Thank you for helping, I will update the results after this

Hi Jackson, I have tried implementing the code, is my writing correct? following are the results SdFat sd; File file; void setup() { // put your setup code here, to run once: Serial.begin(9600); if (!sd.begin()) return false; // Initialization failed } bool findStringInFile(const char *file…

missing the includes for the library try something like this, with the serial monitor at 115200 bauds #include <SdFat.h> SdFat sd; bool findStringInFile(const char *filename, const char *searchString, size_t &pos) { File file = sd.open(filename, FILE_READ); if (!file) return false; // File n…

Txt data search on Arduino SD card

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ranggajulizar November 5, 2024, 10:20am 16

sorry for my misunderstanding...
the result is

"SD initialization failed."

is there no need to declare "chipselect" on

const uint8_t SD_CHIP_SELECT = 4;

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Txt data search on Arduino SD card

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