Hello,
I'm using the esp8266's webserver code from the eamples library but I can't access it from the browser in Winodows systems by IP I set.
in the serial monitor I get :
Connecting to Kobi
.
WiFi connected
Server started
10.0.0.13
new client
GET / HTTP/1.1
invalid request
"
why's that ? any idea ?
Posting code here would be one positive step in getting attention to your problem. Use code tags.
Here is my code, strongly based on the build in example except the static IP that I integrated :
/*
* This sketch demonstrates how to set up a simple HTTP-like server.
* The server will set a GPIO pin depending on the request
* http://server_ip/gpio/0 will set the GPIO2 low,
* http://server_ip/gpio/1 will set the GPIO2 high
* server_ip is the IP address of the ESP8266 module, will be
* printed to Serial when the module is connected.
*/
#include <ESP8266WiFi.h>
const char* ssid = "Kobi";
const char* password = "mypassword";
// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
// config static IP
IPAddress ip(10, 0, 0, 13); // where xx is the desired IP Address
IPAddress gateway(10, 0, 0, 138); // set gateway to match your network
Serial.print(F("Setting static ip to : "));
Serial.println(ip);
IPAddress subnet(255, 255, 255, 0); // set subnet mask to match your
//network
WiFi.config(ip, gateway, subnet);
// prepare GPIO2
pinMode(2, OUTPUT);
digitalWrite(2, 0);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.println(WiFi.localIP());
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
// Read the first line of the request
String req = client.readStringUntil('\r');
Serial.println(req);
client.flush();
// Match the request
int val;
if (req.indexOf("/gpio/0") != -1)
val = 0;
else if (req.indexOf("/gpio/1") != -1)
val = 1;
else {
Serial.println("invalid request");
client.stop();
return;
}
// Set GPIO2 according to the request
digitalWrite(2, val);
client.flush();
// Prepare the response
String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now ";
s += (val)?"high":"low";
s += "</html>\n";
// Send the response to the client
client.print(s);
delay(1);
Serial.println("Client disonnected");
// The client will actually be disconnected
// when the function returns and 'client' object is detroyed
}
In order to get this message:
GET / HTTP/1.1
What URL did you enter in the web browser:
http://10.0.0.13/gpio/0
or what ?
I typed Just "10.0.0.13" but when I hit "http://10.0.0.13/gpio/0" I get
in the serial monitor :
"Connecting to Kobi
.
WiFi connected
Server started
10.0.0.13
new client
GET /gpio/0 HTTP/1.1
Client disonnected"
and in the web :
"GPIO is now low"
Is this address I suppose to write in the browser ? How do you know it ? If so, why I'm not able to switch the pin (and so the led connected to the pin) on and off (that's the purpose of this project) ?
why does the client is "connecting" and then "disconnecting" ?
- Is this address I suppose to write in the browser ? How do you know it ? If so, why I'm not able to switch the pin (and so the led connected to the pin) on and off (that's the purpose of this project) ?
You discover the URL that is required to control the led by looking at the code you wrote:
if (req.indexOf("/gpio/0") != -1)
. . .
contains the relevant part of the URL to turn off the LED.
You have connected a LED to pin GPIO2 and wired it with the correct polarity and via a current limiting resistor ?
OK, I got it
I was looking for the example with a button that you can press on and then the led is switched on and off , that's why I didn't realized why I can't see thatץ
Do you know where can I get this code ? with the switch buttons
Have I got this right ?
You want to press a "button" on device A that activates a LED on device B.
Device B is presumably the ESP8266 that you have successfully installed a web server on.
But what sort of button are you talking about ? A physical tactile switch, for example or a hot spot or clickable element on a web page ?
I want to make a simple "smart home" application which is controlled from a web server and by the esp8266 device. I am going to connect devices (such as lamps etc) through relays to the different gpio pins of the ESP in order to control them. For that I want a GUI for the web like "on" and "off" switch for lamp 1 connected to gpio 5 (for example) and "on" and "off" switch for lamp 2 connected to gpio3 etc... Is there any GUI example ready to use ? Or any such code ?
There is a lot of examples. Google for: esp8266 web server switch led
You are already using the Arduino Core software on your ESP device, so ignore any examples which use 'AT' commands.
Here is one.
You might want to consider Blynk instead of a web server.