Hello Blynkers,
I don’t understand noting about server blynk, but I would like to know:
With the Blynk server it is possible for me to do the communication without being on the internet. For example, create a network on the router without internet and do drives through Blynk?
I say this because in college, I can not route the internet and wanted to create my own network for this.
it’s possible? I accept ideas.
Yes
I would like install in my computer, but in the instalation of java many errors occur.
one doubts:
Need to be installed which version of java?
I will try to install the server in Raspberry because I can not make a connection.
The IP that took the same as a raspberry is connected in the network?
I don’t understand this question.
Whatever IP your router gives your RPI is the IP you point your App and Devices to, when connecting to your Local Server.
I feel that I’m close to solving, in the application I can get into the server, but in the arduino code this is difficult
You are using the wrong port…
9443 (not 9442) is what you use in your App
8080 is what you use in your code.
Amazing!!!
now it worked.
Thanks man!
one last question to finish this topic, if I pick up any router, plug it into the socket without internet, and connect my raspberry and my arduino with ethernet shield will it work?
Yes, a router will work for your internal network just fine without internet. You just need to have everything (Server, Phone, Devices) connecting via WiFi to it via DHCP (or static)… like normal really, just no web 
Okay, do I need to change any doors?
The only change I made was the RPI IP that changed.
But continued with DHCP error
What is your whole code (no screenshots please.)
And please format it when pasting it here…
The full code is this :sorriso:
int contato = 2;
int pirPin = 6;
#include <EEPROM.h> // We are going to read and write PICC's UIDs from/to EEPROM
#include <SPI.h> // RC522 Module uses SPI protocol
#include <MFRC522.h> // Library for Mifare RC522 Devices
#define BLYNK_PRINT Serial
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <SerialRelay.h>
SerialRelay relays(22, 23, 1); // (data, clock, número de módulos)
#define COMMON_ANODE
#ifdef COMMON_ANODE
#define LED_ON LOW
#define LED_OFF HIGH
#else
#define LED_ON HIGH
#define LED_OFF LOW
#endif
#define redLed 25 // Set Led Pins
#define greenLed 26
#define blueLed 24
#define relay 8 // Set Relay Pin
#define wipeB 3 // Button pin for WipeMode
#define W5100_CS 10
#define SDCARD_CS 4
bool programMode = false; // initialize programming mode to false
uint8_t successRead; // Variable integer to keep if we have Successful Read from Reader
byte storedCard[4]; // Stores an ID read from EEPROM
byte readCard[4]; // Stores scanned ID read from RFID Module
byte masterCard[4]; // Stores master card's ID read from EEPROM
// Create MFRC522 instance.
#define SS_PIN 53
#define RST_PIN 5
MFRC522 mfrc522(SS_PIN, RST_PIN);
char auth[] = "636c9d838c794296aabd177971425508";
BLYNK_WRITE(V0) {
int pinValue = param.asInt();
//Serial.println(pinValue);
if (pinValue == 1) {
relays.SetRelay(1, SERIAL_RELAY_ON, 1); // liga o relé 01
} else {
relays.SetRelay(1, SERIAL_RELAY_OFF, 1); // desliga o relé 01
}
}
BLYNK_WRITE(V1) {
int pinValue = param.asInt();
//Serial.println(pinValue);
if (pinValue == 1) {
relays.SetRelay(2, SERIAL_RELAY_ON, 1); // liga o relé 02
} else {
relays.SetRelay(2, SERIAL_RELAY_OFF, 1); // desliga o relé 02
}
}
BLYNK_WRITE(V2) {
int pinValue = param.asInt();
//Serial.println(pinValue);
if (pinValue == 1) {
relays.SetRelay(3, SERIAL_RELAY_ON, 1); // liga o relé 03
} else {
relays.SetRelay(3, SERIAL_RELAY_OFF, 1); // desliga o relé 03
}
}
///////////////////////////////////////// Setup ///////////////////////////////////
void setup() {
//Arduino Pin Configuration
Serial.begin(9600); // Initialize serial communications with PC
pinMode(SDCARD_CS, OUTPUT);
digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card
Blynk.begin(auth, IPAddress(192,168,0,3), 8080);
pinMode(redLed, OUTPUT);
pinMode(greenLed, OUTPUT);
pinMode(blueLed, OUTPUT);
pinMode(wipeB, INPUT_PULLUP); // Enable pin's pull up resistor
pinMode(relay, OUTPUT);
//Be careful how relay circuit behave on while resetting or power-cycling your Arduino
digitalWrite(relay, LOW); // Make sure door is locked
digitalWrite(redLed, LED_OFF); // Make sure led is off
digitalWrite(greenLed, LED_OFF); // Make sure led is off
digitalWrite(blueLed, LED_OFF); // Make sure led is off
pinMode(contato, INPUT); // Set pin as INPUT
pinMode(pirPin, INPUT);
//Protocol Configuration
Serial.begin(9600); // Initialize serial communications with PC
SPI.begin(); // MFRC522 Hardware uses SPI protocol
mfrc522.PCD_Init(); // Initialize MFRC522 Hardware
//If you set Antenna Gain to Max it will increase reading distance
//mfrc522.PCD_SetAntennaGain(mfrc522.RxGain_max);
Serial.println(F("Access Control Example v0.1")); // For debugging purposes
ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
//Wipe Code - If the Button (wipeB) Pressed while setup run (powered on) it wipes EEPROM
if (digitalRead(wipeB) == LOW) { // when button pressed pin should get low, button connected to ground
digitalWrite(redLed, LED_ON); // Red Led stays on to inform user we are going to wipe
Serial.println(F("Wipe Button Pressed"));
Serial.println(F("You have 10 seconds to Cancel"));
Serial.println(F("This will be remove all records and cannot be undone"));
bool buttonState = monitorWipeButton(10000); // Give user enough time to cancel operation
if (buttonState == true && digitalRead(wipeB) == LOW) { // If button still be pressed, wipe EEPROM
Serial.println(F("Starting Wiping EEPROM"));
for (uint16_t x = 0; x < EEPROM.length(); x = x + 1) { //Loop end of EEPROM address
if (EEPROM.read(x) == 0) { //If EEPROM address 0
// do nothing, already clear, go to the next address in order to save time and reduce writes to EEPROM
}
else {
EEPROM.write(x, 0); // if not write 0 to clear, it takes 3.3mS
}
}
Serial.println(F("EEPROM Successfully Wiped"));
digitalWrite(redLed, LED_OFF); // visualize a successful wipe
delay(200);
digitalWrite(redLed, LED_ON);
delay(200);
digitalWrite(redLed, LED_OFF);
delay(200);
digitalWrite(redLed, LED_ON);
delay(200);
digitalWrite(redLed, LED_OFF);
}
else {
Serial.println(F("Wiping Cancelled")); // Show some feedback that the wipe button did not pressed for 15 seconds
digitalWrite(redLed, LED_OFF);
}
}
// Check if master card defined, if not let user choose a master card
// This also useful to just redefine the Master Card
// You can keep other EEPROM records just write other than 143 to EEPROM address 1
// EEPROM address 1 should hold magical number which is '143'
if (EEPROM.read(1) != 143) {
Serial.println(F("No Master Card Defined"));
Serial.println(F("Scan A PICC to Define as Master Card"));
do {
successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
digitalWrite(blueLed, LED_ON); // Visualize Master Card need to be defined
delay(200);
digitalWrite(blueLed, LED_OFF);
delay(200);
}
while (!successRead); // Program will not go further while you not get a successful read
for ( uint8_t j = 0; j < 4; j++ ) { // Loop 4 times
EEPROM.write( 2 + j, readCard[j] ); // Write scanned PICC's UID to EEPROM, start from address 3
}
EEPROM.write(1, 143); // Write to EEPROM we defined Master Card.
Serial.println(F("Master Card Defined"));
}
Serial.println(F("-------------------"));
Serial.println(F("Master Card's UID"));
for ( uint8_t i = 0; i < 4; i++ ) { // Read Master Card's UID from EEPROM
masterCard[i] = EEPROM.read(2 + i); // Write it to masterCard
Serial.print(masterCard[i], HEX);
}
Serial.println("");
Serial.println(F("-------------------"));
Serial.println(F("Everything is ready"));
Serial.println(F("Waiting PICCs to be scanned"));
cycleLeds(); // Everything ready lets give user some feedback by cycling leds
}
///////////////////////////////////////// Main Loop ///////////////////////////////////
void loop () {
do {
Blynk.run();
if (digitalRead(contato) == HIGH) {
Blynk.notify("Porta Aberta");
delay(1000);
}
int pirValue = digitalRead(pirPin);
if (pirValue == HIGH) {
Blynk.notify("Detected Someone");
delay(1000);
}
if (pirValue == LOW) {
delay(1000);
}
successRead = getID(); // sets successRead to 1 when we get read from reader otherwise 0
// When device is in use if wipe button pressed for 10 seconds initialize Master Card wiping
if (digitalRead(wipeB) == LOW) { // Check if button is pressed
// Visualize normal operation is iterrupted by pressing wipe button Red is like more Warning to user
digitalWrite(redLed, LED_ON); // Make sure led is off
digitalWrite(greenLed, LED_OFF); // Make sure led is off
digitalWrite(blueLed, LED_OFF); // Make sure led is off
// Give some feedback
Serial.println(F("Wipe Button Pressed"));
Serial.println(F("Master Card will be Erased! in 10 seconds"));
bool buttonState = monitorWipeButton(10000); // Give user enough time to cancel operation
if (buttonState == true && digitalRead(wipeB) == LOW) { // If button still be pressed, wipe EEPROM
EEPROM.write(1, 0); // Reset Magic Number.
Serial.println(F("Master Card Erased from device"));
Serial.println(F("Please reset to re-program Master Card"));
while (1);
}
Serial.println(F("Master Card Erase Cancelled"));
}
if (programMode) {
cycleLeds(); // Program Mode cycles through Red Green Blue waiting to read a new card
}
else {
normalModeOn(); // Normal mode, blue Power LED is on, all others are off
}
}
while (!successRead); //the program will not go further while you are not getting a successful read
if (programMode) {
if ( isMaster(readCard) ) { //When in program mode check First If master card scanned again to exit program mode
Serial.println(F("Master Card Scanned"));
Serial.println(F("Exiting Program Mode"));
Serial.println(F("-----------------------------"));
programMode = false;
return;
}
else {
if ( findID(readCard) ) { // If scanned card is known delete it
Serial.println(F("I know this PICC, removing..."));
deleteID(readCard);
Serial.println("-----------------------------");
Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM"));
}
else { // If scanned card is not known add it
Serial.println(F("I do not know this PICC, adding..."));
writeID(readCard);
Serial.println(F("-----------------------------"));
Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM"));
}
}
}
else {
if ( isMaster(readCard)) { // If scanned card's ID matches Master Card's ID - enter program mode
programMode = true;
Serial.println(F("Hello Master - Entered Program Mode"));
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that
Serial.print(F("I have ")); // stores the number of ID's in EEPROM
Serial.print(count);
Serial.print(F(" record(s) on EEPROM"));
Serial.println("");
Serial.println(F("Scan a PICC to ADD or REMOVE to EEPROM"));
Serial.println(F("Scan Master Card again to Exit Program Mode"));
Serial.println(F("-----------------------------"));
}
else {
if ( findID(readCard) ) { // If not, see if the card is in the EEPROM
Serial.println(F("Welcome, You shall pass"));
granted(300); // Open the door lock for 300 ms
}
else { // If not, show that the ID was not valid
Serial.println(F("You shall not pass"));
denied();
}
}
}
}
///////////////////////////////////////// Access Granted ///////////////////////////////////
void granted ( uint16_t setDelay) {
digitalWrite(blueLed, LED_OFF); // Turn off blue LED
digitalWrite(redLed, LED_OFF); // Turn off red LED
digitalWrite(greenLed, LED_ON); // Turn on green LED
relays.SetRelay(4, SERIAL_RELAY_ON, 1); // turn the relay ON
delay(1000); // wait for a second
relays.SetRelay(4, SERIAL_RELAY_OFF, 1); // turn the relay OFF
delay(1000);
//digitalWrite(relay, HIGH); // Unlock door!
//delay(1000);
//delay(setDelay); // Hold door lock open for given seconds
//digitalWrite(relay, LOW); // Relock door
//delay(3000); // Hold green LED on for a second
}
///////////////////////////////////////// Access Denied ///////////////////////////////////
void denied() {
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_ON); // Turn on red LED
delay(1000);
}
///////////////////////////////////////// Get PICC's UID ///////////////////////////////////
uint8_t getID() {
// Getting ready for Reading PICCs
if ( ! mfrc522.PICC_IsNewCardPresent()) { //If a new PICC placed to RFID reader continue
return 0;
}
if ( ! mfrc522.PICC_ReadCardSerial()) { //Since a PICC placed get Serial and continue
return 0;
}
// There are Mifare PICCs which have 4 byte or 7 byte UID care if you use 7 byte PICC
// I think we should assume every PICC as they have 4 byte UID
// Until we support 7 byte PICCs
Serial.println(F("Scanned PICC's UID:"));
for ( uint8_t i = 0; i < 4; i++) { //
readCard[i] = mfrc522.uid.uidByte[i];
Serial.print(readCard[i], HEX);
}
Serial.println("");
mfrc522.PICC_HaltA(); // Stop reading
return 1;
}
void ShowReaderDetails() {
// Get the MFRC522 software version
byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
Serial.print(F("MFRC522 Software Version: 0x"));
Serial.print(v, HEX);
if (v == 0x91)
Serial.print(F(" = v1.0"));
else if (v == 0x92)
Serial.print(F(" = v2.0"));
else
Serial.print(F(" (unknown),probably a chinese clone?"));
Serial.println("");
// When 0x00 or 0xFF is returned, communication probably failed
if ((v == 0x00) || (v == 0xFF)) {
Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
Serial.println(F("SYSTEM HALTED: Check connections."));
// Visualize system is halted
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_ON); // Turn on red LED
while (true); // do not go further
}
}
///////////////////////////////////////// Cycle Leds (Program Mode) ///////////////////////////////////
void cycleLeds() {
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
}
//////////////////////////////////////// Normal Mode Led ///////////////////////////////////
void normalModeOn () {
digitalWrite(blueLed, LED_ON); // Blue LED ON and ready to read card
digitalWrite(redLed, LED_OFF); // Make sure Red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure Green LED is off
digitalWrite(relay, HIGH); // Make sure Door is Locked
}
//////////////////////////////////////// Read an ID from EEPROM //////////////////////////////
void readID( uint8_t number ) {
uint8_t start = (number * 4 ) + 2; // Figure out starting position
for ( uint8_t i = 0; i < 4; i++ ) { // Loop 4 times to get the 4 Bytes
storedCard[i] = EEPROM.read(start + i); // Assign values read from EEPROM to array
}
}
///////////////////////////////////////// Add ID to EEPROM ///////////////////////////////////
void writeID( byte a[] ) {
if ( !findID( a ) ) { // Before we write to the EEPROM, check to see if we have seen this card before!
uint8_t num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards
uint8_t start = ( num * 4 ) + 6; // Figure out where the next slot starts
num++; // Increment the counter by one
EEPROM.write( 0, num ); // Write the new count to the counter
for ( uint8_t j = 0; j < 4; j++ ) { // Loop 4 times
EEPROM.write( start + j, a[j] ); // Write the array values to EEPROM in the right position
}
successWrite();
Serial.println(F("Succesfully added ID record to EEPROM"));
}
else {
failedWrite();
Serial.println(F("Failed! There is something wrong with ID or bad EEPROM"));
}
}
///////////////////////////////////////// Remove ID from EEPROM ///////////////////////////////////
void deleteID( byte a[] ) {
if ( !findID( a ) ) { // Before we delete from the EEPROM, check to see if we have this card!
failedWrite(); // If not
Serial.println(F("Failed! There is something wrong with ID or bad EEPROM"));
}
else {
uint8_t num = EEPROM.read(0); // Get the numer of used spaces, position 0 stores the number of ID cards
uint8_t slot; // Figure out the slot number of the card
uint8_t start; // = ( num * 4 ) + 6; // Figure out where the next slot starts
uint8_t looping; // The number of times the loop repeats
uint8_t j;
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that stores number of cards
slot = findIDSLOT( a ); // Figure out the slot number of the card to delete
start = (slot * 4) + 2;
looping = ((num - slot) * 4);
num--; // Decrement the counter by one
EEPROM.write( 0, num ); // Write the new count to the counter
for ( j = 0; j < looping; j++ ) { // Loop the card shift times
EEPROM.write( start + j, EEPROM.read(start + 4 + j)); // Shift the array values to 4 places earlier in the EEPROM
}
for ( uint8_t k = 0; k < 4; k++ ) { // Shifting loop
EEPROM.write( start + j + k, 0);
}
successDelete();
Serial.println(F("Succesfully removed ID record from EEPROM"));
}
}
///////////////////////////////////////// Check Bytes ///////////////////////////////////
bool checkTwo ( byte a[], byte b[] ) {
for ( uint8_t k = 0; k < 4; k++ ) { // Loop 4 times
if ( a[k] != b[k] ) { // IF a != b then false, because: one fails, all fail
return false;
}
}
return true;
}
///////////////////////////////////////// Find Slot ///////////////////////////////////
uint8_t findIDSLOT( byte find[] ) {
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that
for ( uint8_t i = 1; i <= count; i++ ) { // Loop once for each EEPROM entry
readID(i); // Read an ID from EEPROM, it is stored in storedCard[4]
if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM
// is the same as the find[] ID card passed
return i; // The slot number of the card
}
}
}
///////////////////////////////////////// Find ID From EEPROM ///////////////////////////////////
bool findID( byte find[] ) {
uint8_t count = EEPROM.read(0); // Read the first Byte of EEPROM that
for ( uint8_t i = 1; i < count; i++ ) { // Loop once for each EEPROM entry
readID(i); // Read an ID from EEPROM, it is stored in storedCard[4]
if ( checkTwo( find, storedCard ) ) { // Check to see if the storedCard read from EEPROM
return true;
}
else { // If not, return false
}
}
return false;
}
///////////////////////////////////////// Write Success to EEPROM ///////////////////////////////////
// Flashes the green LED 3 times to indicate a successful write to EEPROM
void successWrite() {
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is on
delay(200);
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
delay(200);
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
delay(200);
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(greenLed, LED_ON); // Make sure green LED is on
delay(200);
}
///////////////////////////////////////// Write Failed to EEPROM ///////////////////////////////////
// Flashes the red LED 3 times to indicate a failed write to EEPROM
void failedWrite() {
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
delay(200);
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
delay(200);
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
delay(200);
digitalWrite(redLed, LED_ON); // Make sure red LED is on
delay(200);
}
///////////////////////////////////////// Success Remove UID From EEPROM ///////////////////////////////////
// Flashes the blue LED 3 times to indicate a success delete to EEPROM
void successDelete() {
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
digitalWrite(redLed, LED_OFF); // Make sure red LED is off
digitalWrite(greenLed, LED_OFF); // Make sure green LED is off
delay(200);
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
digitalWrite(blueLed, LED_OFF); // Make sure blue LED is off
delay(200);
digitalWrite(blueLed, LED_ON); // Make sure blue LED is on
delay(200);
}
////////////////////// Check readCard IF is masterCard ///////////////////////////////////
// Check to see if the ID passed is the master programing card
bool isMaster( byte test[] ) {
return checkTwo(test, masterCard);
}
bool monitorWipeButton(uint32_t interval) {
uint32_t now = (uint32_t)millis();
while ((uint32_t)millis() - now < interval) {
// check on every half a second
if (((uint32_t)millis() % 500) == 0) {
if (digitalRead(wipeB) != LOW)
return false;
}
}
return true;
}
All devices are connected in the same router and the router confired in DHCP.
But the in the arduino not function.
OK, I have no idea on the IP part… perhaps just try this way?
Blynk.begin(auth, "192.168.0.3", 8080);
But wow 
… you need to read this about your overloaded void loop() and use of delay()
Thanks for ideas.
I will make any test
I could not even, after countless attempts, continue with error (DHCP failure)
I tried to cool static IP, using this tutorial
But it still did not connect.
Hey Gunner, sorry to upset you 
I did another test with a NodeMCU card and I was able to make a communication.
Now I’m worried that a question is wrong