Control 16 relays via Arduino with Ethernet

-
Hello, I'm going to share again with another project that helps many of you to solve the issue of how to switch the relay remotely.
I have done a bit of a specific project for 2 chats that are remotely controlled when each user has their own sites where they manage their outputs. Arduino Due and Ethernet shield W5100 have enough microcontrollers and have enough GPIO pins for 16 relay channels . As Due does not have everyone, the codes for this project will be customized for 2 Arduino Uno boards with W5100 Ethernet shields.

The web part is written in PHP procedural style. There are 2 user accounts where you can control 8 outputs for each user. One user does not see the other outputs and can not change them. At the same time, both users can both be in the web application, and each one can manage their outputs.

 1st user
Name: user1
Password: user1

2nd user
Name: admin
Password: admin

The login data can be changed to the site you choose whenever it is possible to change it as needed. Once the data is changed, you will be able to print your system to make sure that your name and password have been altered (for example, inverted y and z may disable the login). All the names and passwords to the application are stored with the fixed length SHA1 hash.
The system does not use the database, so just copy and work with the site.

The pages consist of a login page and a functional login page. If the user is not logged in, he / she will not be able to get to the demo site, it will automatically be redirected to the login page.

Functional pages have the role of:


  • Switching the relay
  • Changing relay names
  • Change your login information
  • Save Arduino code
  • Safe sign out of the app
For username: user1 password: user1
#include <SPI.h>
#include <Ethernet.h> //Zmenit pre Ethernet2.h pre W5500
const int vystup1 = 0;
const int vystup2 = 1;
const int vystup3 = 2;
const int vystup4 = 3;
//D4 vynechany - pre SD kartu
const int vystup5 = 5;
const int vystup6 = 6;
const int vystup7 = 7;
const int vystup8 = 8;

byte mac[] = { 0xAA, 0xBB, 0xCC, 0x81, 0x7B, 0x4A }; //fyzicka adresa MAC
char serverName[] = "www.arduino.php5.sk"; // webserver
IPAddress ip(192, 168, 1, 254);
EthernetClient client;
String readString;
int x=0; //pocitadlo riadkov
char lf=10; //line feed character
void setup(){
pinMode(vystup1, OUTPUT);
pinMode(vystup2, OUTPUT);
pinMode(vystup3, OUTPUT);
pinMode(vystup4, OUTPUT);
pinMode(vystup5, OUTPUT);
pinMode(vystup6, OUTPUT);
pinMode(vystup7, OUTPUT);
pinMode(vystup8, OUTPUT);
 if (Ethernet.begin(mac) == 0) {
    Serial.println("DHCP nepridelilo adresu, skusam so statickou...");
    Ethernet.begin(mac, ip); //nastav k mac adrese i IP adresu staticku
  }
  Serial.begin(9600); 
}
void stav_vystup1(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele1.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup1, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup1, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
  void stav_vystup2(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele2.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup2, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup2, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
    void stav_vystup3(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele3.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup3, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup3, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
 void stav_vystup4(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele4.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup4, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup4, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
    void stav_vystup5(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele5.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup5, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup5, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
void stav_vystup6(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele6.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup6, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup6, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
void stav_vystup7(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele7.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup7, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup7, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
 void stav_vystup8(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele8.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup8, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup8, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }

void loop(){
stav_vystup1();
stav_vystup2();
stav_vystup3();
stav_vystup4();
stav_vystup5();
stav_vystup6();
stav_vystup7();
stav_vystup8();
delay(5000); //opakuj slucku loop o 5 sekund
}
For username: admin password: admin
#include <SPI.h>
#include <Ethernet.h>
const int vystup1 = 0;
const int vystup2 = 1;
const int vystup3 = 2;
const int vystup4 = 3;
//D4 vynechany - pre SD kartu
const int vystup5 = 5;
const int vystup6 = 6;
const int vystup7 = 7;
const int vystup8 = 8;

byte mac[] = { 0xAA, 0xBB, 0xCC, 0x81, 0x7B, 0x4C }; //fyzicka adresa MAC
char serverName[] = "www.arduino.php5.sk"; // webserver
IPAddress ip(192, 168, 1, 253);
EthernetClient client;
String readString;
int x=0; //pocitadlo riadkov
char lf=10; //line feed character
void setup(){
pinMode(vystup1, OUTPUT);
pinMode(vystup2, OUTPUT);
pinMode(vystup3, OUTPUT);
pinMode(vystup4, OUTPUT);
pinMode(vystup5, OUTPUT);
pinMode(vystup6, OUTPUT);
pinMode(vystup7, OUTPUT);
pinMode(vystup8, OUTPUT);
 if (Ethernet.begin(mac) == 0) {
    Serial.println("DHCP nepridelilo adresu, skusam so statickou...");
    Ethernet.begin(mac, ip); //nastav k mac adrese i IP adresu staticku
  }
  Serial.begin(9600); 
}
void stav_vystup1(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele10.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup1, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup1, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
  void stav_vystup2(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele11.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup2, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup2, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
    void stav_vystup3(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele12.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup3, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup3, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
 void stav_vystup4(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele13.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup4, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup4, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
    void stav_vystup5(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele14.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup5, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup5, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
void stav_vystup6(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele15.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup6, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup6, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
void stav_vystup7(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele16.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup7, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup7, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }
 void stav_vystup8(){
  if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /rele/rele17.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  // ukonc HTTP/1.1 spojenie
    client.println(); //koneic requestu
  } 
  else {
    Serial.println("Pripojenie neuspesne"); //chyba ak nie som pripojeny
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //cakaj na data
  while (client.connected() || client.available()) { //pramenna
    char c = client.read(); //dostan bity z buffera
    Serial.print(c); //cela http hlavicka
    if (c==lf) x=(x+1); //pocitaj 
    else if (x==12) readString += c; //nasa premenna

   } 
if(readString=="ZAP"){
  digitalWrite(vystup8, HIGH); 
  }else if(readString=="VYP"){
  digitalWrite(vystup8, LOW);  
    }
    else{
 Serial.println("Nepodporovany stav! - chyba");
 }  
  readString = ("");
  x=0;
  client.stop(); //ukonc spojenie
  }

void loop(){
stav_vystup1();
stav_vystup2();
stav_vystup3();
stav_vystup4();
stav_vystup5();
stav_vystup6();
stav_vystup7();
stav_vystup8();
delay(5000); //opakuj slucku loop o 5 sekund
}
Both these sketches for Arduin are linked to https://arduino.php5.sk/rele/, where you can also sketch the sketches directly using the web interface on this page. Thanks to the bootstrap, the relay can also be controlled via a smartphone or other device.

When rewriting sketches for your project / site, remember the following things:

  • The W5100 Ethernet shield only supports HTTP pages
  • Set up an address on your site (for both the server and the host)
  • Change your IP address to the extent you use on your LAN
  • It is possible to connect max. 10A at 230V to one relay
  • The length of the received response that parses the variable that is stored in the text file may vary depending on the server engine (Apache / Nginx) and its configuration. If the data is not read correctly (the incorrect row is parsed), you need to change the x parameter


Web App Screenshots:


Web Part: https://ulozto.sk/!GSxqEHGQBqtw/smartreleapp-zip
More about the project: https://arduino.php5.sk/ovladanie-rele.php
Other interesting projects can be found on my website: https://arduino.php5.sk

Comments

Post a Comment

Popular posts from this blog

Web scraper via Arduino & NodeMCU & ESP32

-
Image
Today, we will devote our microcontroller and its general use to a rather unusual purpose. Specifically, I will be talking about how I made a microcontroller from a webscraper. (If this can be called when processing your own backend information). As many of you know, a web scraper is a device that performs the task of retrieving information from that web site. The most wanted information from websites is e-mail addresses, phone numbers. Recently, however, this phenomenon is also used for a variety of statistical tasks where the scraper receives data on products, their prices, and evaluates them. Even similar devices are used as robots for trading with cryptomas or common names. At the most appropriate time (statistically) the robot pedal and bought another - a suitable menu with a rising tendency. In my case, I was interested in getting information from websites, specifically phone numbers and email addresses. We will therefore go directly to the realization. I have used 3 kinds
Read more

ESP32 control via UDP datagrams

-
Image
Today I would like to point out the possibility of controlling the ESP32 development board by sending UDP messages for easy ON / OFF control. This is one of the easiest ways to send data, process it, and take action based on the information received. ESP32 is a platform that is used in most cases in connection with WiFi connectivity as a webserver or webclient, which connects to a remote server and POST, GET method, or with the integration of the MQTT protocol, sends data to a remote server / guest. Libraries for ESP32 written in C++ Arduino core (framework) also allows to use asynchronous UDP libraries for sending and receiving data. An interesting feature is asynchronicity, as they work in the "background" and the user does not have to program complex functions to accept connections, process information, etc. To send data to the ESP32 development board, we need a simple UDP client. In my case, I used the Windows version of the relatively well-known Packet Sender client. It
Read more

Biking on Google Maps - Arduino Leonardo (32u4) - HID device

-
Image
Cycling is a very popular sport, also thanks to the successful athlete Petr Sagan. Passionate cyclists roam our roads and paths. However, as the weather is not always good, not only a fan of bicycles would like to ride from the comfort of home. So today I am bringing a way to do this, say, the augmented reality of Google maps. At the beginning we will go through the necessary hardware resources for the project and in the next step we will discuss their functionality. Hardware Components: Arduino (32u4 CPU) Leonardo  Magnetic reel switch  2x pushbuttons  To use the system, the user must turn on Google Maps, select any site in the world and switch to Street View mode. This ensures a ready interface for interacting with the bike (Arduin). Any type of bicycle can be used. Classic, road, mountain, treadmill. A magnetic contact must be fitted on the pedal and the structure. The main element of the system is the use of the Arduino Leonardo development board, which contains an AT
Read more