Hi Guys, I am sending message thru Bluetooth, getting it on LCD. I got this part working, all good. Now I want to store that message on EEPROM. And when device powered up , it should show that message. Everything working but message is not showing. for some reason its showing 152. Could you pl…

Try the following put() and get() methods instead of read() and write() methods: EEPROM.put(addr, (char*)commandbuffer); EEPROM.get(addr, myData);

you are reading only one byte from your eeprom. if you want a character representation instead of the byte value then you need to cast it to string or char array before you print.

Hi, yeah, I am starting to understand now. It was only one byte. Learning about strings and arrays now. something like that char *myStrings[] = {"This is string 1", "This is string 2", "This is string 3", "This is string 4", "This is string 5", "This is string 6" …

Hi guys, I tried arrays. I used value = EEPROM.get(0, myArray[X]); and I used EEPROM.put I arranged my array from serial reading - if(Serial.available()>0){ myArray[X]=Serial.available(); And somehow I still get exactly the same result. LCD showing "152" after I turn it on. Could you please…

Try this code. Basically, you need to loop over your array of char (not int) and read/write each char to/from EEPROM #include <Wire.h> #include <hd44780.h> // main hd44780 header #include <hd44780ioClass/hd44780_I2Cexp.h> // i2c expander i/o class header #include <EEPROM.h> hd44780_I2C…

Thank you blh64, I just tried it. Its asking me to declare "i" for this line while ( Serial.available() && i < maxMessageLength - 1) I am not sure what "i" should be. I think its 0 i tried int i = 0; but got that on LCD (see attached image plz) [LCD_1_1.jpg]

I tried adding delays to see what happens. I cant find it somehow what happens now: everything working. message is showing on LCD from EEPROM. However only for a split second. here is current code: #include <Wire.h> #include <hd44780.h> // main hd44780 header #include <hd44780ioClas…

I had changed your 'i' variable to 'idx' Based on your questions and attempts at code, I would really suggest you look at some of the examples that come with the IDE and really learn how they work and why. As a way of debugging your code, you can do everything you did in your setup() function but …

Thank you so much blh64 :slight_smile: I am learning a lot from you! You right, I need to go back to basics. Working on it now. I just really need that project coz its a part of other project. Its digital label. I changed to idx. Its working, however after powering it up, I get just some of the …

EEPROM

Projects Programming

PASHGEN January 6, 2020, 2:55am 9

It does show message on LCD but only for a moment!
And then it gets covered by blocks

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EEPROM

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