Hallo zusammen,
ich versuche schon seit mehreren Stunden meinen Fehler zu beheben, bekomme es aber nicht hin.
Der Fehler ist fas ganz am Ende bei "server.send(200, "text/html", content());"
Hier bekomme beim Kompilieren die Meldung: "'content' was not declared in this scope"
Der Sketch läuft auf einem ESP8266 01, der als Webserver dient, um seine GPIOs zu schalten, davor muss man sich aber anmelden.
Der Plan ist der, wenn ich auf einen Button klick, dann wird die IP des ESP aufgerufen und /output1 dahinter gehängt. Im Sketch wird dann geschaut ob der "output1_state" true oder false ist und wird dann eben entweder ein oder ausgeschaltet.
Ich hoffe man versteht was ich meine.
Ich wäre froh, wenn mir jemand sagen kann, was ich falsch mache....Das Programm sonst läuft einwandfrei. Es hängt nur an der einen Zeile....
Schonmal Vielen Dank!!
und hier der Code:
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
const char* ssid = "Banane";
const char* password = "19ihetc57g";
const char* host = "webcontrol";
// define GPIO pins:
const int output1 = 0;
const int output2 = 2;
// output status variables:
boolean output1_state = true;
boolean output2_state = true;
ESP8266WebServer server(80);
//Check if header is present and correct
bool is_authentified(){
Serial.println("Enter is_authentified");
if (server.hasHeader("Cookie")){
Serial.print("Found cookie: ");
String cookie = server.header("Cookie");
Serial.println(cookie);
if (cookie.indexOf("ESPSESSIONID=1") != -1) {
Serial.println("Authentification Successful");
return true;
}
}
Serial.println("Authentification Failed");
return false;
}
//login page, also called for disconnect
void handleLogin(){
String msg;
if (server.hasHeader("Cookie")){
Serial.print("Found cookie: ");
String cookie = server.header("Cookie");
Serial.println(cookie);
}
if (server.hasArg("DISCONNECT")){
Serial.println("Disconnection");
String header = "HTTP/1.1 301 OK\r\nSet-Cookie: ESPSESSIONID=0\r\nLocation: /login\r\nCache-Control: no-cache\r\n\r\n";
server.sendContent(header);
return;
}
if (server.hasArg("USERNAME") && server.hasArg("PASSWORD")){
if (server.arg("USERNAME") == "admin" && server.arg("PASSWORD") == "admin" ){
String header = "HTTP/1.1 301 OK\r\nSet-Cookie: ESPSESSIONID=1\r\nLocation: /\r\nCache-Control: no-cache\r\n\r\n";
server.sendContent(header);
Serial.println("Log in Successful");
return;
}
msg = "Wrong username/password! try again.";
Serial.println("Log in Failed");
}
String content = "<html><body><form action='/login' method='POST'>To log in, please use : admin/admin
";
content += "User:<input type='text' name='USERNAME' placeholder='user name'>
";
content += "Password:<input type='password' name='PASSWORD' placeholder='password'>
";
content += "<input type='submit' name='SUBMIT' value='Submit'></form>" + msg + "
";
server.send(200, "text/html", content);
}
//root page can be accessed only if authentification is ok
void handleRoot(){
Serial.println("Enter handleRoot");
String header;
if (!is_authentified()){
String header = "HTTP/1.1 301 OK\r\nLocation: /login\r\nCache-Control: no-cache\r\n\r\n";
server.sendContent(header);
return;
}
String content = "<html><body><H2>hello, you successfully connected to esp8266!</H2>
";
if (server.hasHeader("User-Agent")){
content += "the user agent used is : " + server.header("User-Agent") + "
";
if (output1_state)
{
content += "Output1: <a href=\"output1\"><button>ON</button></a>
";
}
else
{
content += "Output1: <a href=\"output1\"><button>OFF</button></a>
";
}
if (output2_state)
{
content += "Output2: <a href=\"output2\"><button>ON</button></a>
";
}
else
{
content += "Output2: <a href=\"output2\"><button>OFF</button></a>
";
}
}
content += "You can access this page until you <a href=\"/login?DISCONNECT=YES\">disconnect</a></body></html>";
server.send(200, "text/html", content);
}
void setup(void){
// configure GPIO 0 and GPIO 2 as outputs:
pinMode(output1, OUTPUT);
pinMode(output2, OUTPUT);
// set outputs to low:
digitalWrite(output1, LOW);
digitalWrite(output2, LOW);
Serial.begin(115200);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
if (MDNS.begin(host))
{
Serial.println("mDNS responder started");
}
MDNS.addService("http", "tcp", 80);
//here the list of headers to be recorded
const char * headerkeys[] = {"User-Agent","Cookie"} ;
size_t headerkeyssize = sizeof(headerkeys)/sizeof(char*);
//ask server to track these headers
server.collectHeaders(headerkeys, headerkeyssize );
server.begin();
Serial.println("HTTP server started");
server.on("/", handleRoot);
server.on("/login", handleLogin);
server.on("/output1", [](){
if (output1_state)
{
Serial.println("LED1 aus");
Serial.println(output1_state);
digitalWrite(output1, LOW);
output1_state = false;
}
else
{
Serial.println("LED1 an");
digitalWrite(output1, HIGH);
Serial.println(output1_state);
output1_state = true;
}
server.send(200, "text/html", content());
delay(1000);
});
}
void loop(void){
server.handleClient();
}
