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Copy pathNetwork-discovery-and-connect.ino
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Network-discovery-and-connect.ino
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/*
*scan available networks
*connect to a known network if available
*
*
*This code can be applied if i have more known networks(home, work and friend's home for example),
*and want the module to connect just with the strongest known network.
*/
#include "ESP8266WiFi.h"
WiFiServer server(80);
void setup() {
Serial.begin(115200);
// Set WiFi to station mode and disconnect from an AP if it was previously connected
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
Serial.println("Setup done");
Serial.println("scan start");
// WiFi.scanNetworks will return the number of networks found
int n = WiFi.scanNetworks();
Serial.println("scan done");
if (n == 0)
Serial.println("no networks found");
else
{
Serial.print(n);
Serial.println(" networks found");
for (int i = 0; i < n; ++i)
{
// Print SSID and RSSI for each network found
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"no encryption found");
delay(10);
}
}
Serial.println("");
n = WiFi.scanNetworks();
Serial.println(n);
Serial.println("ricerca SSID named wifi");
for (int i =0; i<n; i++){
Serial.println(i);
Serial.println(WiFi.SSID(i));
if(strcmp(WiFi.SSID(i), "wifi") == 0){
Serial.println("wifi c'è!");
WiFi.begin("wifi", "wifidicasa1111");//not my real password :P
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.println(WiFi.localIP());
}
else{
Serial.println("no wifi");
}
}
}
void loop() {
if(WiFi.status() == WL_CONNECTED){
// 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");
}
}