Bar: 1 version importeret

2022-10-21T12:36:37Z

1 version importeret

← Ældre version	Versionen fra 21. okt. 2022, 14:36
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htx_>Bar med 16. nov. 2020, 12:50

2020-11-16T12:50:15Z

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{{template:WeMOS-software}}
Dette eksempel tager udgangspunkt i et eksempel fundet ved esp8266learning.com<ref>[http://www.esp8266learning.com/wemos-webserver-example.php Eksempel på Webserver]</ref>.

Formålet er at vise hvordan man kan lade [[WeMOS]] prøve at connecte til forskellige netværk.

==Samlet kode==
<source lang="C">
#include <ESP8266WiFi.h>

const int networkAntal = 2;

const char* ssid [] = {
"AndroidAP",
"ssid name"
};

const char* password [] = {
"hybh9024",
"ssid password"
};

int ledPin = 2;
WiFiServer server(80);

const int startLength = 4;
const String start_response [] = {
"HTTP/1.1 200 OK",
"Content-Type: text/html",
"",
"<!DOCTYPE HTML>",
};

const int htmlLength = 5;
const String html_response [] = {
"<html>",
"Click <a href=\"/LED=ON\">here</a> turn the LED on pin 2 ON<br>",
"Click <a href=\"/LED=OFF\">here</a> turn the LED on pin 2 OFF<br>",
"<br><br>",
"Led pin is now: "
};

void setup() {
Serial.begin(115200);
delay(10);

pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, HIGH);

boolean OK = false;
int networks = 0;
while (!OK) {
// Connect to WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid[networks]);

WiFi.begin(ssid[networks], password[networks]);

int antal = 0;
while (WiFi.status() != WL_CONNECTED && antal < 16) {
delay(500);
Serial.print(".");
antal++;
}
if (WiFi.status() == WL_CONNECTED) {
OK = true;
Serial.println("");
Serial.println("WiFi connected");
}
networks++;
if (networks >= networkAntal) {
networks = 0;
}
}

// Start the server
server.begin();
Serial.println("Server started");

// Print the IP address
Serial.print("Use this URL : ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");

}

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 request = client.readStringUntil('\r');
Serial.println(request);
client.flush();

// Match the request

int value = LOW;
if (request.indexOf("/LED=ON") != -1) {
digitalWrite(ledPin, LOW); // Inverted output Low to turn LED ON
value = HIGH;
}
if (request.indexOf("/LED=OFF") != -1){
digitalWrite(ledPin, HIGH); // Inverted output High to turn LED OFF
value = LOW;
}

// Return the response
for (int n = 0; n < startLength; n++) {
client.println(start_response[n]);
}
for (int n = 0; n < htmlLength; n++) {
client.println(html_response[n]);
}

if(value == HIGH) {
client.print("On");
} else {
client.print("Off");
}
client.println("</html>");
delay(1);
Serial.println("Client disconnected");
Serial.println("");
}
</source>
==Server Connection==
Selve forbindelsen til netværket tager stadig udgangspunkt i teknikken beskrevet i [[WeMOS Server Connection]], hvor der forbindes til Wifi og der sættes en server op.

Der laves en datastruktur med den netværk man ønsker at prøve igennem og med det tilsvarende passwords:
<source lang="C">
const int networkAntal = 2;

const char* ssid [] = {
"AndroidAP",
"ssid name"
};

const char* password [] = {
"hyzx1234",
"ssid password"
};

</source>

==Oprettelse af forbindelse==
Der prøves så for hvert netværk i 8 sekunder om der opnås forbindelse, og hvis der ikke gør, så prøves det næste netværk.

Denne kode er placeret i [[setup()]]:
<source lang="C">
boolean OK = false;
int networks = 0;
while (!OK) {
// Connect to WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid[networks]);

WiFi.begin(ssid[networks], password[networks]);

int antal = 0;
while (WiFi.status() != WL_CONNECTED && antal < 16) {
delay(500);
Serial.print(".");
antal++;
}
if (WiFi.status() == WL_CONNECTED) {
OK = true;
Serial.println("");
Serial.println("WiFi connected");
}
networks++;
if (networks >= networkAntal) {
networks = 0;
}
}
</source>

==Referencer==
<references />
[[Kategori:WeMOS]]

WeMOS Flere SSID - Versionshistorie

Bar: 1 version importeret

htx_>Bar med 16. nov. 2020, 12:50