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made webserver work with sensors

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simonox 2022-12-20 16:46:11 +01:00
parent 0a98af7b5b
commit e4041e0266
1 changed files with 30 additions and 56 deletions
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first-webserver/first-webserver.ino
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@ -1,11 +1,12 @@
/*********
Rui Santos
Complete project details at http://randomnerdtutorials.com
*********/
// Load Wi-Fi library
#include <WiFi.h> #include <WiFi.h>
#include "credentials.h" #include <DHT.h>
#include "credentials.h" // put your WIFI credentials in here
#define DHT_SENSOR_PIN 21 // ESP32 pin GIOP21 connected to DHT11 sensor
#define DHT_SENSOR_TYPE DHT11
#define AOUT_PIN 36 // ESP32 pin GIOP36 (ADC0) that connects to AOUT pin of moisture sensor
DHT dht_sensor(DHT_SENSOR_PIN, DHT_SENSOR_TYPE);
// Replace with your network credentials // Replace with your network credentials
const char* ssid = secrect_ssid; const char* ssid = secrect_ssid;
@ -17,13 +18,7 @@ WiFiServer server(80);
// Variable to store the HTTP request // Variable to store the HTTP request
String header; String header;
// Auxiliar variables to store the current output state
String output26State = "off";
String output27State = "off";
// Assign output variables to GPIO pins
const int output26 = 26;
const int output27 = 27;
// Current time // Current time
unsigned long currentTime = millis(); unsigned long currentTime = millis();
@ -33,13 +28,9 @@ unsigned long previousTime = 0;
const long timeoutTime = 2000; const long timeoutTime = 2000;
void setup() { void setup() {
Serial.begin(115200); Serial.begin(9600);
// Initialize the output variables as outputs dht_sensor.begin(); // initialize the DHT sensor
pinMode(output26, OUTPUT);
pinMode(output27, OUTPUT);
// Set outputs to LOW
digitalWrite(output26, LOW);
digitalWrite(output27, LOW);
// Connect to Wi-Fi network with SSID and password // Connect to Wi-Fi network with SSID and password
Serial.print("Connecting to "); Serial.print("Connecting to ");
@ -58,6 +49,17 @@ void setup() {
} }
void loop(){ void loop(){
// read humidity
float humi = dht_sensor.readHumidity();
// read temperature in Celsius
float tempC = dht_sensor.readTemperature();
// read temperature in Fahrenheit
float tempF = dht_sensor.readTemperature(true);
// read soil
int soil = analogRead(AOUT_PIN); // read the analog value from sensor
WiFiClient client = server.available(); // Listen for incoming clients WiFiClient client = server.available(); // Listen for incoming clients
if (client) { // If a new client connects, if (client) { // If a new client connects,
@ -82,25 +84,6 @@ void loop(){
client.println("Connection: close"); client.println("Connection: close");
client.println(); client.println();
// turns the GPIOs on and off
if (header.indexOf("GET /26/on") >= 0) {
Serial.println("GPIO 26 on");
output26State = "on";
digitalWrite(output26, HIGH);
} else if (header.indexOf("GET /26/off") >= 0) {
Serial.println("GPIO 26 off");
output26State = "off";
digitalWrite(output26, LOW);
} else if (header.indexOf("GET /27/on") >= 0) {
Serial.println("GPIO 27 on");
output27State = "on";
digitalWrite(output27, HIGH);
} else if (header.indexOf("GET /27/off") >= 0) {
Serial.println("GPIO 27 off");
output27State = "off";
digitalWrite(output27, LOW);
}
// Display the HTML web page // Display the HTML web page
client.println("<!DOCTYPE html><html>"); client.println("<!DOCTYPE html><html>");
client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">"); client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
@ -113,25 +96,16 @@ void loop(){
client.println(".button2 {background-color: #555555;}</style></head>"); client.println(".button2 {background-color: #555555;}</style></head>");
// Web Page Heading // Web Page Heading
client.println("<body><h1>ESP32 Web Server</h1>"); client.println("<body><h1>ESP32</h1>");
// Display current state, and ON/OFF buttons for GPIO 26 // Display current state, and ON/OFF buttons for GPIO 26
client.println("<p>GPIO 26 - State " + output26State + "</p>"); client.println("<p>Temperature ");
// If the output26State is off, it displays the ON button client.println(tempC);
if (output26State=="off") { client.println("&deg;C</p>");
client.println("<p><a href=\"/26/on\"><button class=\"button\">ON</button></a></p>"); client.println("<p>Moisture value ");
} else { client.println(soil);
client.println("<p><a href=\"/26/off\"><button class=\"button button2\">OFF</button></a></p>"); client.println("</p>");
} client.println("<script>window.setTimeout(() => {window.location.href = window.location.href}, 1000)</script>");
// Display current state, and ON/OFF buttons for GPIO 27
client.println("<p>GPIO 27 - State " + output27State + "</p>");
// If the output27State is off, it displays the ON button
if (output27State=="off") {
client.println("<p><a href=\"/27/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/27/off\"><button class=\"button button2\">OFF</button></a></p>");
}
client.println("</body></html>"); client.println("</body></html>");
// The HTTP response ends with another blank line // The HTTP response ends with another blank line