hello i have this acces controll project i am working on but every time the relay is on the arduino board runs the setup code again ? any idea as to why ?
> /* ***********************************************************
> * Libraries *
> * ********************************************************* */
> #include <SPI.h>
> #include <MFRC522.h>
>
> /* ***********************************************************
> * Global Constants *
> * Hardware Definitions *
> * ********************************************************* */
> /* Typical pin layout used:
> * -----------------------------------------------------------------------------------------
> * MFRC522 Arduino Arduino Arduino Arduino Arduino
> * Reader/PCD Uno Mega Nano v3 Leonardo/Micro Pro Micro
> * Signal Pin Pin Pin Pin Pin Pin
> * -----------------------------------------------------------------------------------------
> * RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
> * SPI SS SDA(SS) 10 53 D10 10 10
> * SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
> * SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
> * SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
> */
> /* ***********************************************************
> * Global Variables *
> * ********************************************************* */
> const char rows = 4;
> const char cols = 3;
> const int relay=14;
> const int buttonPin=15;
> const int buzzer=16;
> const int ledPin=17;
> int buttonRead;
> const int PasswordLength = 4;
> String MasterPassword ="0304";
> String correctPassword[100];
> int key_count=0;
> int key_index;
>
>
> const char keys[rows][cols] = {
> {'1','2','3'},
> {'4','5','6'},
> {'7','8','9'},
> {'*','0','#'}
> };
>
> char rowPins[rows] = {8, 7, 6, 5};
> char colPins[cols] = {4, 3, 2};
>
> bool stats;
> char* ValidTags[12] = {};
> String ReadTag = "";
> int Tagindex;
> int Tagcount=0;
> const byte rstPin = 9;
> const byte ssPin = 10;
> MFRC522 Rfid(ssPin, rstPin);
>
>
>
> void setup () {
> Serial.begin(9600);
> SPI.begin();
> pinMode(buttonPin, INPUT);
> pinMode(relay,OUTPUT);
> pinMode(ledPin,OUTPUT);
> pinMode(buzzer,OUTPUT);
> for(char r = 0; r < rows; r++){
> pinMode(rowPins[r], INPUT); //set the row pins as input
> digitalWrite(rowPins[r], HIGH); //turn on the pullups
> }
>
> for(char c = 0; c < cols; c++){
> pinMode(colPins[c], OUTPUT); //set the column pins as output
> }
>
> Rfid.PCD_Init();
> Rfid.PCD_DumpVersionToSerial();
> Serial.println("Set the master tag:");
>
> while (!Rfid.PICC_IsNewCardPresent()) {}
> Rfid.PICC_ReadCardSerial();
> get_tag_id();
> ValidTags[Tagcount] = strdup(ReadTag.c_str());
> Tagcount++;
>
> }
>
>
>
>
> void loop() {
> bool state=false;
> String key="A";
> buttonRead=digitalRead(buttonPin);
> if(button_press()=='*'){
> digitalWrite(ledPin,HIGH);
> key = get_key();
> state=prog_state(key);
> digitalWrite(ledPin,LOW);
> }
> if(state==true){
> key="A";
> while(key=="A"){key=get_key();}
> Serial.println("adding key:"+key);
> add_key(key);
> }
> bool door=check_key(key);
>
> if(door==true){
>
> open_door(door);
> }
> if (Rfid.PICC_IsNewCardPresent()) {
> if (Rfid.PICC_ReadCardSerial()) {
> get_tag_id();
> stats = check_tag_id();
> if (!stats) {
> if(ReadTag == ValidTags[0]) {
> add_rem_tags();
> return;
> }
> }
> open_door(stats);
> } else {
> return;
> }
> }
>
> if(buttonRead==0){
> Serial.println("button in here");
> open_door(true);
> }
> delay(1000);
> }
>
> bool check_key(String key){
> for(int i=0;i<100;i++){
>
> if(key==correctPassword[i]){
> return true;
> }else if(key=="A"){
> return false;}
> }
> int m=0;
> while(m<4){
> digitalWrite(buzzer,HIGH);
> digitalWrite(ledPin,HIGH);
> delay(100);
> digitalWrite(buzzer,LOW);
> digitalWrite(ledPin,LOW);
> delay(600);
> Serial.println(m);
> m++;
> }
> }
> void open_door(bool val){
> if(val==true){
> Serial.println("door open");
> digitalWrite(relay,HIGH);
> digitalWrite(buzzer,HIGH);
> digitalWrite(ledPin,HIGH);
> delay(1000);
> digitalWrite(buzzer,LOW);
> delay(1000);
> digitalWrite(ledPin,LOW);
> digitalWrite(relay,LOW);
> Serial.println("door Closed");
> delay(50);
> }
> }
>
> String get_key(){
> int t=0;
> String k;
> while(t<PasswordLength){
> for(char c = 0; c < cols; c++){
> digitalWrite(colPins[c], LOW);
> for(char r = 0; r < rows; r++){
> if(digitalRead(rowPins[r]) == LOW){
> delay(50); //20ms debounce time
> while(digitalRead(rowPins[r])== LOW);
> k = k+keys[r][c];
> t++;
> delay(50);
> }
> }
> digitalWrite(colPins[c], HIGH);
> }
> }
> return k;
> }
> char button_press(){
> char k = 0;
>
> for(char c = 0; c < cols; c++){
> digitalWrite(colPins[c], LOW);
> for(char r = 0; r < rows; r++){
> if(digitalRead(rowPins[r]) == LOW){
> delay(20); //20ms debounce time
> while(digitalRead(rowPins[r])== LOW);
> k = keys[r][c];
> }
> }
> digitalWrite(colPins[c], HIGH);
> }
> return k;
> }
>
> bool prog_state(String key){
> bool prog_mode1;
> if (key == MasterPassword){
> prog_mode1=true;
> }
> else{
> prog_mode1=false;
> }
> return prog_mode1;
> }
>
> void add_key(String key){
> if(key!=MasterPassword){
> for(int i=0;i<100;i++){
> if(key==correctPassword[i]){key_index=i;}
> }
> if(key_index==0){
> correctPassword[key_count]=key;
> key_count++;
> Serial.println("added:"+key);
> }
>
> }else{
> Serial.println("Cannot add master pasword to valid pass");
> }
> }
>
> bool check_tag_id() {
> for (int i = 1; i < 12; i++) {
> if (ReadTag == ValidTags[i]) {
> return true;
> }
> }
> return false;
> }
>
> void get_tag_id() {
> ReadTag = "";
> for (byte i = 0; i < Rfid.uid.size; i++) {
> ReadTag.concat(String(Rfid.uid.uidByte[i], HEX));
> }
> ReadTag.toUpperCase();
> Rfid.PICC_HaltA();
> Serial.println(ReadTag);
> }
>
>
> void add_rem_tags() {
> ReadTag = "";
> Tagindex = 0;
> while (!Rfid.PICC_IsNewCardPresent()) {digitalWrite(ledPin,HIGH);}
> digitalWrite(ledPin,LOW);
> Rfid.PICC_ReadCardSerial();
> get_tag_id();
> for (int e = 1; e < 12; e++) {
> if (ReadTag == ValidTags[e]) {
> Tagindex = e;
> }
> }
>
> if (Tagindex != 0) {
> ValidTags[Tagindex] = '\0';
> } else if (ReadTag != ValidTags[0]) {
> ValidTags[Tagcount] = strdup(ReadTag.c_str());
> Tagcount++;
> Serial.println("added this tag: " + ReadTag);
> return;
> } else {
> Serial.println("Cannot add the master tag as a Valid Tag. It's only for adding or removing tags from the valid tags list.");
> return;
> }
my relay is 5 v dc relay
can i use a usb phone charger to power it ??
