Arduino ESP8266 read String from EEPROM - string

Question

I achieve to read a String from the ESP8266 EEPROM - so far so good.
However, trying to append a second string to the just read first one does not work!
I start with having the number 2 at address 0 of the EEPROM. I read from address 0 to 6.
Here is my ESP8266.ino code :
String readM = "";
String appendixStr = "|||";
Serial.print("appendixStr = ");
Serial.println(appendixStr);
String dailyzStr = "";
for (int a = 0; a < 7; ++a) { // addr 0...6
dailyzStr += char(EEPROM.read(a));
}
readM += dailyzStr + appendixStr;
Serial.print("hmmm = ");
Serial.println(readM);
And here is what the log prints:
Clearly, I would expect hmmm = 2||| but I only get hmmm = 2
Why is it not possible to append ??

Answer 1

I would recommend to use this:
#include <EEPROM.h>
// Tell it where to store your config data in EEPROM
#define cfgStart 32
// To check if it is your config data
#define version "abc"
struct storeStruct_t{
char myVersion[3];
char name[32];
};
void saveConfig() {
// Save configuration from RAM into EEPROM
EEPROM.begin(4095);
EEPROM.put( cfgStart, settings );
delay(200);
EEPROM.commit(); // Only needed for ESP8266 to get data written
EEPROM.end(); // Free RAM copy of structure
}
void loadConfig() {
// Loads configuration from EEPROM into RAM
Serial.println("Loading config");
storeStruct_t load;
EEPROM.begin(4095);
EEPROM.get( cfgStart, load);
EEPROM.end();
// Check if it is your real struct
if (test.myVersion[0] != version[0] ||
test.myVersion[1] != version[1] ||
test.myVersion[2] != version[2]) {
saveConfig();
return;
}
settings = load;
}
// Empty settings struct which will be filled from loadConfig()
storeStruct_t settings = {
"",
""
};
Use saveConfig() to save the settings struct
If you want to load from the EEPROM use loadConfig() -> it will be stored in the settings struct