created project, added code, added library

created project, added code from phantomix, which got slightly changed to talk to the parallelport library

platformio.ini

@@ -0,0 +1,18 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:az-delivery-devkit-v4]
+platform = espressif32
+board = az-delivery-devkit-v4
+framework = arduino
+monitor_speed = 9600
+
+; Libraries
+lib_deps = robtillaart/ParallelPrinter@^0.2.4

src/main.cpp

@@ -0,0 +1,109 @@
+#include <ParallelPrinter.h>
+#include <WiFi.h>
+#include <WebServer.h>
+
+WiFiServer server(21);
+WiFiClient client;
+
+#define wifi_ssid "dezentrale-2.4"
+#define wifi_password "dezentrale"
+
+ParallelPrinter PP;
+
+bool wifi_connect()
+{
+  delay(5000);
+  Serial.print("Connecting to ");
+  Serial.println(wifi_ssid);
+
+  WiFi.begin(wifi_ssid, wifi_password);
+  static int timeout = 20;
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    Serial.print(".");
+    if(timeout == 0)
+    {
+      Serial.println("Failed to connect: Timeout");
+      return false;
+    }
+    timeout--;
+    delay(500);
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("Local IP address: ");
+  Serial.println(WiFi.localIP());
+  return true;
+}
+
+void setup()
+{
+// put your setup code here, to run once:
+  Serial.begin(9600);
+  Serial.println();
+
+  if(wifi_connect())
+  {
+    server.begin();
+    Serial.println("Telnet port = 21");
+    Serial.println("Password: drucker");
+  } else
+  {
+    Serial.println("Failed to connect.");
+  }
+  Serial.println();
+  Serial.println();
+
+  PP.begin(); // create connection to printer
+}
+
+bool clientAuthorized = false;
+void loop()
+{
+// put your main code here, to run repeatedly:
+
+  size_t bytes = 0;
+  if (client.connected())
+  {
+    bytes = client.available();
+    if (bytes)
+    {
+      if (clientAuthorized)
+      {
+        char buf[32];
+        if (bytes > 32) bytes = 32;
+        client.readBytes(buf,bytes);
+        String line = client.readStringUntil('\n');
+        //PP.println(buf,bytes);
+        PP.println(line);
+        Serial.write(buf,bytes);
+        //Serial.print('\n');
+      } else
+      {
+        String line = client.readStringUntil('\n');
+        if(!strcmp("drucker",line.c_str())) // Passwordcheck
+        {
+          clientAuthorized = true;
+          client.println("You are now logged in.");
+        }
+      }
+    }
+    size_t bytes = Serial.available();
+    if(bytes)
+    {
+      char buf[32];
+      if(bytes > 32) bytes = 32;
+      Serial.readBytes(buf, bytes);
+      //String s = Serial.readString();
+      //client.print(s);
+      client.write(buf,bytes);
+    }
+  } else
+  {
+    clientAuthorized = false;
+    client = server.available();
+    //send out password info
+    client.println("Please enter password.");
+  }
+}