#include <Preferences.h>

// See https://docs.espressif.com/projects/arduino-esp32/en/latest/tutorials/preferences.html
Preferences preferences;



String S1 = "String numéro 1";
String S2 = "String numéro 2";
String S3 = "String numéro 3";
String S4 = "String numéro 4";

const byte tailleMax = 30;
char cs1[tailleMax + 1] = "c-string numéro 1";
char cs2[tailleMax + 1] = "c-string numéro 2";
char cs3[tailleMax + 1] = "c-string numéro 3";
char cs4[tailleMax + 1] = "c-string numéro 4";

void setup() {
  Serial.begin(115200);

  preferences.begin("my-app", false);

  // on sauve tout
  preferences.putString("S1", S1);
  preferences.putString("S2", S2);
  preferences.putString("S3", S3);
  preferences.putString("S4", S4);

  preferences.putBytes("cs1", cs1, tailleMax + 1);
  preferences.putBytes("cs2", cs2, tailleMax + 1);
  preferences.putBytes("cs3", cs3, tailleMax + 1);
  preferences.putBytes("cs4", cs4, tailleMax + 1);

  String lectureS1 = "";
  String lectureS2 = "";
  String lectureS3 = "";;
  String lectureS4 = "";

  char lectureCs1[tailleMax + 1] = {};
  char lectureCs2[tailleMax + 1] = {};
  char lectureCs3[tailleMax + 1] = {};
  char lectureCs4[tailleMax + 1] = {};


  Serial.println("AVANT LECTURE");
  Serial.print("lectureS1 = "); Serial.println(lectureS1);
  Serial.print("lectureS2 = "); Serial.println(lectureS2);
  Serial.print("lectureS3 = "); Serial.println(lectureS3);
  Serial.print("lectureS4 = "); Serial.println(lectureS4);

  Serial.print("lectureCs1 = "); Serial.println(lectureCs1);
  Serial.print("lectureCs2 = "); Serial.println(lectureCs2);
  Serial.print("lectureCs3 = "); Serial.println(lectureCs3);
  Serial.print("lectureCs4 = "); Serial.println(lectureCs4);

  // on relit tout

  lectureS1 = preferences.getString("S1", "");
  lectureS2 = preferences.getString("S2", "");
  lectureS3 = preferences.getString("S3", "");
  lectureS4 = preferences.getString("S4", "");

  preferences.getBytes("cs1", lectureCs1, tailleMax + 1);
  preferences.getBytes("cs2", lectureCs2, tailleMax + 1);
  preferences.getBytes("cs3", lectureCs3, tailleMax + 1);
  preferences.getBytes("cs4", lectureCs4, tailleMax + 1);

  Serial.println("\n\nAPRES LECTURE");
  Serial.print("lectureS1 = "); Serial.println(lectureS1);
  Serial.print("lectureS2 = "); Serial.println(lectureS2);
  Serial.print("lectureS3 = "); Serial.println(lectureS3);
  Serial.print("lectureS4 = "); Serial.println(lectureS4);

  Serial.print("lectureCs1 = "); Serial.println(lectureCs1);
  Serial.print("lectureCs2 = "); Serial.println(lectureCs2);
  Serial.print("lectureCs3 = "); Serial.println(lectureCs3);
  Serial.print("lectureCs4 = "); Serial.println(lectureCs4);

  preferences.end();
}

void loop() {}