Reading and comparing data from Arduino Uno EEPROM

Question

I'm trying to read compare data from EEPROM (Arduino UNO). Reading is working fine but comparing it using the '==' operator is not working as expected.

//string 'True' is already stored in EEPROM
int addr = 0;
char value = EEPROM.read(addr);
Serial.println(value);// this line successfully prints the letter 'T'
// but this function is not working
if (value == "T") {
 Serial.println("foo");
}

• jsotola: this has nothing to do with EEPROM ... this is a question about comparing strings
• Sigma: I have a problem like I that did you finally fix it. I will be glad if it worked.

Answer 1

There is a HUGE difference between "string" and 'c' 'h' 'a' 'r'.

You are comparing address of string "T" with the numerical value of character 'T'.

The expression: if (value == 'T') will be much better.

• smc: Thank you for the answer. How can I read and compare the first letter of the string stored at addr = 0; ?
• KIIV: @ShyamMohan You have to use 'T' instead of "T" to compare value with...