Introduction: Arduino Rfid Read and Write on Lcd

Picture of Arduino Rfid Read and Write on Lcd

i will show you how to make arduino rfid read and write on lcd

Step 1:

Hi there!

Today i will show you how to make arduino rfid read and write on lcd. Download the code and load it on arduino it does not matter witch one but i prefer uno and infiduino.

Things you will need:

*lcd (16,2) eny one i used 16 by 2

*rfid (rc522)

*rfid tag


*some jumpers

*pot (10k)

Step 2: Lcd Pinout

Picture of Lcd Pinout

Connect rfid scenner and lcd to arduino as showned on schematic and dont forget pu put pot on vo of the lcd if you dont you will se apsulutly nothing.

Lcd connections

vss - to gnd

vdd - to 5v

vo - to pot

rs - to arduino digital pit 7

rw - to gnd

e - to arduino digital pin 6

d4 - to arduino digital pin 5

d5 - to arduino digital pin 4

d6 - to arduino digital pin 3

d7 - to arduino digital pin 2

A - to arduino digital pin 8

K - to gnd

Step 3: Rfid Pinout

Picture of Rfid Pinout

3,3 - to arduino 3,3 volt rail

rst - to arduino digital pin 9

gnd - to arduino gnd rail

rqi - not connected

miso - to arduino digital pin 12

mosi - to arduino digital pin 11

sck - to arduino digital pin 13

sda - to arduino digital pin 10

Step 4: Trying It Out

Picture of Trying It Out

when you are all done connect arduino to power sorse and wait to arduino turn lcds back light when che lcd cleans scan rfid card then go thro the progrem when is over it will say success 16:-) the lcds back lights will turn off then reset your arduino to start program over again.

thanks enjoy


choclawrence (author)2017-08-18

Hello sir, My project involves the rfid,the lcd and the arduino uno without the potentiometer. I have an i2C already. I believe the code will change because of this. Can you advice me on how to carry on? I am a super newbie but interested in arduino

timtolar (author)2017-04-27

Hi. Sorry for the delay for any more information send a mail to

tydryfly (author)2017-04-21

MFRC522 mfrc522(SS_PIN, RST_PIN);

This is highlighting as error when i try to verify code? any ideas

NevzatP1 (author)tydryfly2017-04-26

if you need any help you can email me :

NevzatP1 (author)tydryfly2017-04-26

now it worked u should uptade your mfrc522 lib

NevzatP1 (author)tydryfly2017-04-26

code isnt work for me i tryed 10 times,rebuild 10 times but never work for me any helps

NevzatP1 (author)2017-04-17

Tim when you look at there can you help us ? there is a problem on code to where you converse it to byte

SaipulM (author)2016-11-15

i found this problem, How to solved this problem??

invalid conversion from 'byte {aka unsigned char}' to 'MFRC522::PICC_Type' [-fpermissive]

NevzatP1 (author)SaipulM2017-04-17

i got this problem too and i dont know to how to solve it

NevzatP1 (author)2017-04-17

Hello there nothing show on screen how solve it ?

0xDEADBEAF (author)2016-10-05

*A - to 5v

timtolar (author)2015-12-20

have some one have an idea for a nother project please post it n a comments

DIY Hacks and How Tos (author)2015-11-01

Great project. This arduino setup has a lot of potential applications.