How escape character works

[ark1944]

I have made a String variable, 'proName' .. with 15 characters stored in EEPROM of Arduino Mega.
I want to send this String to Nextion display text object, since the text to be sent is not Static..I am trying to use the escape character ( " ) before the String variable like this..

nexSerial.print("t0.txt= "); nexSerial.print(""" String(proName));
endMessage(); --OR--- t0.setText(""" String(proName));

Here endMessage() sends three 0xFF.
I tried various combinations of quote mark before-after 'back slash+quote' , different places of escape character but nothing works.
Any help will be highly appreciated please.
-Arun

[ark1944]

I am sorry to see the message I posted does not contain the back slash anywhere, that was included in my draft.
I am trying..
nexSerial.print("t0.txt= ");
nextSerial.print(""" String(proName));
endMessage();

[UKHeliBob]

@ark1944

the message I posted does not contain the back slash anywhere

That's because you need to escape it by using 2 backslashes !

"\\"

displays as

"\"

[b707]

@ark1944

I want to send this String to Nextion display text object, since the text to be sent is not Static..I am trying to use the escape character ( " ) before the String variable like this..

You could do that without using an escape characters at all. Try this:

nexSerial.print("t0.txt= ""); 
nexSerial.print(proName);
nexSerial.print("""); 
endMessage();

but better to escape quotation by \

nexSerial.print("t0.txt= \""); 
nexSerial.print(proName);
nexSerial.print("\""); 
endMessage();

[J-M-L]

the compiler would bark at this, wouldn't it?

@b707

nexSerial.print("""); 

[indev2]

Or as I used to do sometime ago...

nexSerial.print("t0.txt= \""); 
nexSerial.print(proName);
nexSerial.print("\x22\xFF\xFF\xFF");

[cattledog]

@ark1944

String variable, 'proName' .. with 15 characters stored in EEPROM of Arduino Mega.

You can not store a String object in eeprom. You will need to store the characters of the underlying character array.

[J-M-L]

@cattledog

You can not store a String object in eeprom

Technically you can but it’s useless as what you write is the pointer address, the size and length, not the actual text which is « outside » the instance

[ark1944]

Yes sure I stored the chacters in the eeprom's 15 locations...anyway my problem of sending a String variable from arduino to nextion has been resolved using the escape charcter backslash and double quote..anyway thanks for ur support...