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In this example we will create a basic web server with an ESP32, we will then serve a we page with an on and off button which will switch an LED on and off Parts Required1x ESP32 Dev Module (Lolin32) Layout
Code
#include <WiFi.h>
// Replace with your network credentials
const char* ssid = "iainhendry";
const char* password = "iain061271";
WiFiServer server(80);
const int led = 15; // the number of the LED pin
// Client variables
char linebuf[80];
int charcount=0;
void setup()
{
// initialize the LED as an output:
pinMode(led, OUTPUT);
//Initialize serial and wait for port to open:
Serial.begin(115200);
while(!Serial) {
}
// We start by connecting to a WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
// attempt to connect to Wifi network:
while(WiFi.status() != WL_CONNECTED)
{
// Connect to WPA/WPA2 network.
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
server.begin();
}
void loop()
{
// listen for incoming clients
WiFiClient client = server.available();
if (client)
{
Serial.println("New client");
memset(linebuf,0,sizeof(linebuf));
charcount=0;
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected())
{
if (client.available())
{
char c = client.read();
Serial.write(c);
//read char by char HTTP request
linebuf[charcount]=c;
if (charcount<sizeof(linebuf)-1) charcount++;
if (c == '\n' && currentLineIsBlank)
{
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println();
client.println("<!DOCTYPE HTML><html><head>");
client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"></head>");
client.println("<h1>ESP32 - Web Server example</h1>");
client.println("<p>LED <a href=\"on\"><button>ON</button></a> <a href=\"off\"><button>OFF</button></a></p>");
client.println("</html>");
break;
}
if (c == '\n')
{
// you're starting a new line
currentLineIsBlank = true;
if (strstr(linebuf,"GET /on") > 0)
{
Serial.println("LED ON");
digitalWrite(led, HIGH);
}
else if (strstr(linebuf,"GET /off") > 0)
{
Serial.println("LED OFF");
digitalWrite(led, LOW);
}
// you're starting a new line
currentLineIsBlank = true;
memset(linebuf,0,sizeof(linebuf));
charcount=0;
}
else if (c != '\r')
{
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
TestingOpen the serial monitor to get the assigned IP address, in your favourite web browser navigate to this IP address This is my example
LinksYou can pick up a module for about $8 Official DOIT ESP32 Development Board WiFi+Bluetooth Ultra-Low Power Consumption Dual Core ESP-32 This is the github instructions, I have been looking at the ESP32 module My ESP Arduino installation is located at J:\esp on my PC but other than changing the paths everything went as planned. The board I bought was a Lolin32 from Wemos – we’ll come to that later Tested on 64 bit Windows 10 machine (I don’t have 32 Bit)
How to update to the latest code
The HC-SR505 Mini PIR Motion Sensor is based on infrared technology and it can automatic control by itself with high sensitivity and high reliability. Because of the minimum size and low-power operation mode, it widely used in various of automatic electronic equipment, especially battery-powered automatic products.
SpecsOperating voltage range: DC 4.5-20V
ConnectionConnect the PIR Motion Sensor to your Arduino power supply pin and digital pins. You can can connect the “s” terminal to any of your arduino I/O Pins
Code
void setup()
{
Serial.begin(9600);
pinMode(6,INPUT);
digitalWrite(6,LOW);
}
void loop()
{
if(digitalRead(6)==HIGH)
{
Serial.println("INTRUDER DETECTED.");
}
else
{
Serial.println("ALL CLEAR.");
}
delay(1000);
}
OutputOpen the serial monitor and you should see something like ALL CLEAR.
Links1 PCS X HC-SR505 Mini Infrared PIR Motion Sensor Precise Infrared Detector Module NEW |
