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ESP32 Read Write variables to SPIFFS.ino
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ESP32 Read Write variables to SPIFFS.ino
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// ESP32 Read Write variables to SPIFFS
// Working on it, so far this is it, write 11 valeus and read 11 values
// directory listing and values
//
// outputs data on serial terminal 115200
//
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
#include "FS.h"
#include "SPIFFS.h"
int CharRead;
char CharArray[16];
/* You only need to format SPIFFS the first time you run a
test or else use the SPIFFS plugin to create a partition
https://github.com/me-no-dev/arduino-esp32fs-plugin */
#define FORMAT_SPIFFS_IF_FAILED 0
void listDir(fs::FS &fs, const char * dirname, uint8_t levels) {
Serial.printf("Listing directory: %s\r\n", dirname);
File root = fs.open(dirname);
if (!root) {
Serial.println("- failed to open directory");
return;
}
if (!root.isDirectory()) {
Serial.println(" - not a directory");
return;
}
File file = root.openNextFile();
while (file) {
if (file.isDirectory()) {
Serial.print(" DIR : ");
Serial.println(file.name());
if (levels) {
listDir(fs, file.name(), levels - 1);
}
} else {
Serial.print(" FILE: ");
Serial.print(file.name());
Serial.print("\tSIZE: ");
Serial.println(file.size());
}
file = root.openNextFile();
}
}
void readFile(fs::FS &fs, const char * path) {
Serial.printf("Reading file: %s\r\n", path);
File file = fs.open(path);
if (!file || file.isDirectory()) {
Serial.println("- failed to open file for reading");
return;
}
Serial.println("- read from file:");
int i = 1;
String ThisString;
while (file.available()) {
CharRead = (file.read());
if (CharRead == 10) { //linefeed
Serial.println(" line feed");
Serial.print("CharArray=>"); Serial.print(CharArray); Serial.println("<=end");
Serial.print("ThisString.toInt() "); Serial.println(ThisString.toInt());
Serial.print("ThisString.toFloat() "); Serial.println(ThisString.toFloat());
memset(CharArray, 0, sizeof(CharArray));//clear array
}
if (CharRead == 13) {
Serial.print(" carriage return ");
ThisString="";
i = 0;
delay(2500);
}
Serial.print(char(CharRead)); delay(50);
CharArray[i] = char(CharRead);
ThisString = String(CharArray);
i = i + 1;
}
}
void writeFile(fs::FS &fs, const char * path, const char * message) {
Serial.printf("Writing file: %s\r\n", path);
File file = fs.open(path, FILE_WRITE);
if (!file) {
Serial.println("- failed to open file for writing");
return;
}
if (file.print(message)) {
Serial.println("- file written");
} else {
Serial.println("- frite failed");
}
}
void appendFile(fs::FS &fs, const char * path, const char * message) {
Serial.printf("Appending to file: %s\r\n", path);
File file = fs.open(path, FILE_APPEND);
if (!file) {
Serial.println("- failed to open file for appending");
return;
}
if (file.print(message)) {
// Serial.print(" - message appended ");
Serial.println(message); // this is written o file
delay(2000);
} else {
Serial.println("- append failed");
}
}
void renameFile(fs::FS &fs, const char * path1, const char * path2) {
Serial.printf("Renaming file %s to %s\r\n", path1, path2);
if (fs.rename(path1, path2)) {
Serial.println("- file renamed");
} else {
Serial.println("- rename failed");
}
}
void deleteFile(fs::FS &fs, const char * path) {
Serial.printf("Deleting file: %s\r\n", path);
if (fs.remove(path)) {
Serial.println("- file deleted");
} else {
Serial.println("- delete failed");
}
}
void testFileIO(fs::FS &fs, const char * path) {
Serial.printf("Testing file I/O with %s\r\n", path);
static uint8_t buf[512];
size_t len = 0;
File file = fs.open(path, FILE_WRITE);
if (!file) {
Serial.println("- failed to open file for writing");
return;
}
size_t i;
Serial.print("- writing" );
uint32_t start = millis();
for (i = 0; i < 2048; i++) {
if ((i & 0x001F) == 0x001F) {
Serial.print(".");
}
file.write(buf, 512);
}
Serial.println("");
uint32_t end = millis() - start;
Serial.printf(" - %u bytes written in %u ms\r\n", 2048 * 512, end);
file.close();
file = fs.open(path);
start = millis();
end = start;
i = 0;
if (file && !file.isDirectory()) {
len = file.size();
size_t flen = len;
start = millis();
Serial.print("- reading" );
while (len) {
size_t toRead = len;
if (toRead > 512) {
toRead = 512;
}
file.read(buf, toRead);
if ((i++ & 0x001F) == 0x001F) {
Serial.print(".");
}
len -= toRead;
}
Serial.println("");
end = millis() - start;
Serial.printf("- %u bytes read in %u ms\r\n", flen, end);
file.close();
} else {
Serial.println("- failed to open file for reading");
}
}
void setup() {
Serial.begin(115200);
if (!SPIFFS.begin(FORMAT_SPIFFS_IF_FAILED)) {
Serial.println("SPIFFS Mount Failed");
return;
}
}
void loop() {
listDir(SPIFFS, "/", 0);
Serial.println("ListDir 5 second delay");
delay(5000);
int sensorValue = 123;
char sensorstring[12];
itoa(sensorValue , sensorstring, 10);
float temperature = 456.789;
char temp[10];
String tempAsString;
dtostrf(temperature, 7, 2, temp); // 7 characters long, with 2 characters after the decimal point.
writeFile(SPIFFS, "/ART_Thermostat.txt", "start\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", sensorstring);//123
appendFile(SPIFFS, "/ART_Thermostat.txt", "\r\n"); // must write end of line
appendFile(SPIFFS, "/ART_Thermostat.txt", temp);//456,789
appendFile(SPIFFS, "/ART_Thermostat.txt", "\r\n"); // must write end of line
appendFile(SPIFFS, "/ART_Thermostat.txt", dtostrf(temperature, 5, 2, temp));//456.789
appendFile(SPIFFS, "/ART_Thermostat.txt", "\r\n"); // must write end of line
appendFile(SPIFFS, "/ART_Thermostat.txt", "16000\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", "16000\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", "16000\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", "32000\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", "32000\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", "32000\r\n");
appendFile(SPIFFS, "/ART_Thermostat.txt", "666.666\r\n");
Serial.println("done writing to file");
Serial.println("5 second delay");
delay(5000);
readFile(SPIFFS, "/ART_Thermostat.txt");
Serial.println("done reading file");
// renameFile(SPIFFS, "/hello.txt", "/foo.txt");
// readFile(SPIFFS, "/TouchCalData");
// deleteFile(SPIFFS, "/TouchCalData");
// testFileIO(SPIFFS, "/test.txt");
Serial.println( "Test complete" );
Serial.println("5 second delay");
delay(5000);
}