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Arduino GUI installiert und Bibliotheken zugeführt
https://www.heise.de/ct/artikel/Arduino-IDE-installieren-und-fit-machen-fuer-ESP8266-und-ESP32-4130814.html

Programm ergoogled:
https://www.instructables.com/id/ESP0101S-RELAY-MODULE-TUTORIAL/
configuriert

Code Block

language	cpp
title	ESP8266_Control_Relay.ino
collapse	true

#include <ESP8266WiFi.h>
 
const char* ssid = "HORNnHORN"; // fill in here your router or wifi SSID
const char* password = "xxxxxxx******"; // fill in here your router or wifi password
 #define RELAY 0 // relay connected to  GPIO0
WiFiServer server(80);
 
void setup() 
{
  Serial.begin(115200); // must be same baudrate with the Serial Monitor
 
  pinMode(RELAY,OUTPUT);
  digitalWrite(RELAY, LOW);
 
  // 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.print("Use this URL to connect: ");
  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("/RELAY=ON") != -1)  
  {
    Serial.println("RELAY=ON");
    digitalWrite(RELAY,LOWHIGH);
    value = LOWHIGH;
  }
  if (request.indexOf("/RELAY=OFF") != -1)  
  {
    Serial.println("RELAY=OFF");
    digitalWrite(RELAY,HIGHLOW);
    value = HIGHLOW;
  }
  
  // Return the response
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  this is a must
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("<head><title>ESP8266 RELAY Control</title></head>");
  client.print("Relay is now: ");
 
  if(value == HIGHLOW) 
  {
    client.print("OFF");
  } 
  else 
  {
    client.print("ON");
  }
  client.println("<br><br>");
  client.println("Turn <a href=\"/RELAY=OFF\">OFF</a> RELAY<br>");
  client.println("Turn <a href=\"/RELAY=ON\">ON</a> RELAY<br>");
    client.println("</html>");
 
  delay(1);
  Serial.println("Client disonnected");
  Serial.println("");
}

festgestellt, dass die eingetragene IP im Originalcode (hier oben isses gefixt) nix zu sagen hat, da das Teil DHCP kann und auch macht - zum Glück man die Daten aber per Intuition aber erkennen kann dank
```
Serial.print(WiFi.localIP());
```
versucht zu programmieren und dabei festgestellt, dass dem 1-EURO-Ebay-Programmier-Adapter der Taster fehlt, um in den Programmiermodus zu kommen:
versus der von mir erstandenen Version (halt ohne Taster)
Lötkolben angeworfen und fachmännisch einen Taster eingeklebt ...

Wenn man das Modul samt Chip jetzt mit gedrücktem Taster in den USB-Port steckt ist das Modul im Programmiermodus...
Programmiert - gesteckt - geht.

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