I am trying to make a web server to display the readings of a dht11. when I am trying to enter the web server using the provided IP address "192.168.1.106, the browser give me "CONNECTION_ERROR_TIMED_OUT"
here is the code
/*********
Rui Santos
Complete project details at https://randomnerdtutorials.com/esp8266-dht11dht22-temperature-and-humidity-web-server-with-arduino-ide/
*********/
// Import required libraries
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <Hash.h>
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>
// Replace with your network credentials
const char* ssid = "";
const char* password = "";
#define DHTPIN 5 // Digital pin connected to the DHT sensor
// Uncomment the type of sensor in use:
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
DHT dht(DHTPIN, DHTTYPE);
// current temperature & humidity, updated in loop()
float t = 0.0;
float h = 0.0;
// Create AsyncWebServer object on port 80
AsyncWebServer server(80);
// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0; // will store last time DHT was updated
// Updates DHT readings every 10 seconds
const long interval = 10000;
// Replaces placeholder with DHT values
String processor(const String& var){
//Serial.println(var);
if(var == "TEMPERATURE"){
return String(t);
}
else if(var == "HUMIDITY"){
return String(h);
}
return String();
}
void setup(){
// Serial port for debugging purposes
Serial.begin(115200);
dht.begin();
// Connect to Wi-Fi
WiFi.begin(ssid, password);
Serial.println("Connecting to WiFi");
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println(".");
}
// Print ESP8266 Local IP Address
Serial.println(WiFi.localIP());
// Route for root / web page
server.on("/temperature", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/plain", String(t).c_str());
});
server.on("/humidity", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/plain", String(h).c_str());
});
// Start server
server.begin();
}
void loop(){
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
// save the last time you updated the DHT values
previousMillis = currentMillis;
// Read temperature as Celsius (the default)
float newT = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
//float newT = dht.readTemperature(true);
// if temperature read failed, don't change t value
if (isnan(newT)) {
Serial.println("Failed to read from DHT sensor!");
}
else {
t = newT;
Serial.println(t);
}
// Read Humidity
float newH = dht.readHumidity();
// if humidity read failed, don't change h value
if (isnan(newH)) {
Serial.println("Failed to read from DHT sensor!");
}
else {
h = newH;
Serial.println(h);
}
}
}
especially "text/plain" cuz I saw someone said "What mime type is text/plane ? Are you trying to transfer an aircraft?" but I don't understand what did he mean.
Are there two different boards, one called ESP8266 and another called ESP8266WiFi? If so, would they use different cores? If so, is the right core in use?
/*
This sketch demonstrates how to scan WiFi networks.
The API is almost the same as with the WiFi Shield library,
the most obvious difference being the different file you need to include:
*/
#include <ESP8266WiFi.h>
void setup() {
Serial.begin(115200);
Serial.println(F("\nESP8266 WiFi scan example"));
// Set WiFi to station mode
WiFi.mode(WIFI_STA);
// Disconnect from an AP if it was previously connected
WiFi.disconnect();
delay(100);
}
void loop() {
String ssid;
int32_t rssi;
uint8_t encryptionType;
uint8_t* bssid;
int32_t channel;
bool hidden;
int scanResult;
Serial.println(F("Starting WiFi scan..."));
scanResult = WiFi.scanNetworks(/*async=*/false, /*hidden=*/true);
if (scanResult == 0) {
Serial.println(F("No networks found"));
} else if (scanResult > 0) {
Serial.printf(PSTR("%d networks found:\n"), scanResult);
// Print unsorted scan results
for (int8_t i = 0; i < scanResult; i++) {
WiFi.getNetworkInfo(i, ssid, encryptionType, rssi, bssid, channel, hidden);
Serial.printf(PSTR(" %02d: [CH %02d] [%02X:%02X:%02X:%02X:%02X:%02X] %ddBm %c %c %s\n"),
i,
channel,
bssid[0], bssid[1], bssid[2],
bssid[3], bssid[4], bssid[5],
rssi,
(encryptionType == ENC_TYPE_NONE) ? ' ' : '*',
hidden ? 'H' : 'V',
ssid.c_str());
delay(0);
}
} else {
Serial.printf(PSTR("WiFi scan error %d"), scanResult);
}
// Wait a bit before scanning again
delay(5000);
}
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
ESP8266WebServer server(80); // create the webserver on port 80
// setup the wifi
char ssid[] = "xxxxx"; // your network SSID (name)
char pass[] = "xxxxx"; // your network password
void handleRoot() {
server.send(200, "text / plain", "Hello world");
}
void setup() {
Serial.begin(115200); // output to the serial terminal for debugging
WiFi.begin(ssid, pass); //Connect to the WiFi network
Serial.println(""); // print a new line
Serial.print("Connecting .");
while (WiFi.status() != WL_CONNECTED) { //Wait for connection
delay(500);
Serial.print(".");
}
Serial.println(""); // print a new line
server.on("/", handleRoot); //Associate the handler function to the path
// this will handle the page 192.168.x.x/other
server.on("/other", []() { //Define the handling function for the path
server.send(200, "text/plain", "Other URL");
});
server.begin(); //Start the server
Serial.print("Server listening, Open ");
Serial.print(WiFi.localIP());
Serial.println(" in your browser.");
}
void loop() {
server.handleClient(); //Handling of incoming requests
}
