BLYNK
HOME       📲 GETTING STARTED       📗 DOCS       ❓HELP CENTER       👉 SKETCH BUILDER

Server Blynk

#1

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.

0 Likes

#2

Yes

0 Likes

#3

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?

0 Likes

#4

0 Likes

#5

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?

0 Likes

#6

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.

0 Likes

#7

Look this image.

it does not connect

0 Likes

#8

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

0 Likes

#9

You are using the wrong port…

9443 (not 9442) is what you use in your App

8080 is what you use in your code.

0 Likes

#10

Amazing!!!

now it worked.

Thanks man!

0 Likes

#11

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?

0 Likes

#12

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 :wink:

0 Likes

#13

Okay, do I need to change any doors?

The only change I made was the RPI IP that changed.

But continued with DHCP error

0 Likes

#14

What is your whole code (no screenshots please.)

And please format it when pasting it here…

Blynk%20-%20FTFC

0 Likes

#15

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;
    }

0 Likes

#16

All devices are connected in the same router and the router confired in DHCP.

But the in the arduino not function.

0 Likes

#17

OK, I have no idea on the IP part… perhaps just try this way?

Blynk.begin(auth, "192.168.0.3", 8080);

But wow :scream:… you need to read this about your overloaded void loop() and use of delay()

0 Likes

#18

Thanks for ideas.

I will make any test

0 Likes

#19

I could not even, after countless attempts, continue with error (DHCP failure)

I tried to cool static IP, using this tutorial

IP FIXED

But it still did not connect.

0 Likes

#20

Hey Gunner, sorry to upset you :rofl:

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

0 Likes