Hey all,
I have an auto irrigation project using ESP32, I'm trying to send a command from a server to the ESP32 to open or close a certain pin, I have used this code and it works when I'm connected to my internal network, but when trying to access the ESP32 when not connected to the local WiFi I'm unable, even when opening the relevant ports in the router and firewall, anyone has any idea how to set up the ESP32 to be able to receive command from a non-local server?
Thanks.
/*
WiFi Web Server LED Blink
A simple web server that lets you blink an LED via the web.
This sketch will print the IP address of your WiFi Shield (once connected)
to the Serial monitor. From there, you can open that address in a web browser
to turn on and off the LED on pin 5.
If the IP address of your shield is yourAddress:
http://yourAddress/H turns the LED on
http://yourAddress/L turns it off
This example is written for a network using WPA encryption. For
WEP or WPA, change the Wifi.begin() call accordingly.
Circuit:
by Tom Igoe
ported for sparkfun esp32
31.01.2017 by Jan Hendrik Berlin
- WiFi shield attached
- LED attached to pin 5
created for arduino 25 Nov 2012
*/
#include <WiFi.h>
const char* ssid = "";
const char* password = "";
int Sensor = 4;
WiFiServer server(9999);
IPAddress local_IP(X, XX, XXXX, XXXX);
// Set your Gateway IP address
IPAddress gateway(X, XX, XXX, XXXX);
IPAddress subnet(255, 255, 255, 0);
void setup()
{
Serial.begin(115200);
pinMode(Sensor, OUTPUT); // set the LED pin mode
delay(10);
// We start by connecting to a WiFi network
// Configures static IP address
if (!WiFi.config(local_IP, gateway, subnet)) {
Serial.println("STA Failed to configure");
}
// Connect to Wi-Fi network with SSID and password
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Print local IP address and start web server
Serial.println("");
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
server.begin();
}
int value = 0;
void loop(){
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("New Client."); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("Click <a href=\"/H\">here</a> to turn the LED on pin 5 on.");
client.print("Click <a href=\"/L\">here</a> to turn the LED on pin 5 off.");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
} else { // if you got a newline, then clear currentLine:
currentLine = "";
}
} else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H")) {
digitalWrite(Sensor, HIGH); // GET /H turns the LED on
}
if (currentLine.endsWith("GET /L")) {
digitalWrite(Sensor, LOW); // GET /L turns the LED off
}
}
}
// close the connection:
client.stop();
Serial.println("Client Disconnected.");
}
}
