I am using arduino mega 2560 and for my project i need to use mpr121 (touch sensor) ,sd card module and rc522 simultaneously but my touch is not working when i combine it with sd card and rc522 in the arduino but it is working fine individually
i need to make sure that an audio is played whenever one of the electrode of mpr121 is touched but when i combine all 3
mpr121 touch is not getting enabled
Can anyone help me out with this?
This is the code that I am using for doing the project
code:
#include <require_cpp11.h>
#include <MFRC522Extended.h>
#include <deprecated.h>
#include <SD.h>
#include <TMRpcm.h>
#include <SPI.h>
#include <MFRC522.h>
#include <Wire.h>
#include "Adafruit_MPR121.h"
#ifndef _BV
#define _BV(bit) (1 << (bit))
#endif
// You can have up to 4 on one i2c bus but one is enough for testing!
Adafruit_MPR121 cap = Adafruit_MPR121();
// Keeps track of the last pins touched
// so we know when buttons are 'released'
uint16_t lasttouched = 0;
uint16_t currtouched = 0;
TMRpcm tmrpcm;
#define SDSlave 10 //CS pin fra SD card
#define RSTPIN 49 //reset pin from RFID
#define RFIDSLAVEPIN 53 // Slavepin from RFID
int pullldowndelay = 50;
// create an object for use in this sketch til lyden
MFRC522 mfrc522(RFIDSLAVEPIN, RSTPIN); // Create MFRC522 instance til RFID scanner
void setup() {
Serial.begin(9600);
pinMode(RFIDSLAVEPIN, OUTPUT);
pinMode(SDSlave, OUTPUT);
while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
SPI.begin(); // Init SPI bus
while (!Serial) { // needed to keep leonardo/micro from starting too fast!
delay(10);
}
Serial.println("Adafruit MPR121 Capacitive Touch sensor test");
// Default address is 0x5A, if tied to 3.3V its 0x5B
// If tied to SDA its 0x5C and if SCL then 0x5D
if (!cap.begin(0x5A)) {
Serial.println("MPR121 not found, check wiring?");
while (1);
}
Serial.println("MPR121 found!");
digitalWrite(RFIDSLAVEPIN, LOW);
digitalWrite(SDSlave, HIGH);
delay(pullldowndelay);
mfrc522.PCD_Init(); // Init MFRC522
mfrc522.PCD_DumpVersionToSerial(); // Show details of PCD - MFRC522 Card Reader details
Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
tmrpcm.speakerPin = 11;
digitalWrite(RFIDSLAVEPIN, HIGH);
digitalWrite(SDSlave, LOW);
delay(pullldowndelay);
if (!SD.begin(SDSlave)) { // see if the card is present and can be initialized:
return; // don't do anything more if not
}
tmrpcm.volume(1);
}
void loop() {
SDCARD();
}
void Sound() {
digitalWrite(RFIDSLAVEPIN, HIGH);
digitalWrite(SDSlave, LOW);
digitalWrite(mprSlave, HIGH);
delay(pullldowndelay);
Serial.print("Sound function called");
tmrpcm.play("6.wav");
delay(1000);
tmrpcm.play("4.wav");
delay(3000);
tmrpcm.play("5.wav");
delay(4000);
tmrpcm.play("3.wav");
delay(2000);
// delay after sound is played to let the song finish
delay(pullldowndelay);
digitalWrite(SDSlave, HIGH);
digitalWrite(RFIDSLAVEPIN, LOW);
digitalWrite(mprSlave, HIGH);
}
void SDCARD() {
// Look for new cards How to Make Arduino Security Access Lock | RFID MFRC522 - YouTube
digitalWrite(SDSlave, HIGH);
digitalWrite(RFIDSLAVEPIN, LOW);
digitalWrite(mprSlave, HIGH);
delay(pullldowndelay);
if (!mfrc522.PICC_IsNewCardPresent()) {
Serial.print("No new cards found");
Serial.println();
return;
}
// Select one of the cards
if (!mfrc522.PICC_ReadCardSerial()) {
Serial.print("Problems reading cards");
Serial.println();
return;
}
// Dump debug info about the card; PICC_HaltA() is automatically called
mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
//Show UID on serial monitor
Serial.print("UID tag :");
String content = "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte < 0x10 ? " 0" : " ");
_ Serial.print(mfrc522.uid.uidByte*, HEX);_
_ content.concat(String(mfrc522.uid.uidByte < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte, HEX));
}
Serial.println();
Serial.print("Message : ");
content.toUpperCase();*_
* if (content.substring(1) == "19 18 54 A2") //change here the UID of the card/cards that you want to give access*
* {*
* Serial.println("Authorized access");*
* Serial.println();*
* currtouched = cap.touched();*
* if ((currtouched & BV(4))){*
* delay(3000);
Sound();
}
}
}
rfidsdmpr.ino (4.77 KB)*_
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