wifi scan

12_esp_sken/.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

12_esp_sken/.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

12_esp_sken/include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the convention is to give header files names that end with `.h'.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

12_esp_sken/lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

12_esp_sken/platformio.ini

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+; 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:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 115200

12_esp_sken/src/main.cpp

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+#include <Arduino.h>
+#include <WiFi.h>
+#include <WebServer.h>
+const char* ssid = "ive3ap";
+const char* password = "iveiveive";
+const char* myHostname = "esp-prijmeni";
+String device_name = "esp-prijmeni";
+WebServer server(80);
+void scanNetwork() {
+  IPAddress ip = WiFi.localIP();
+  Serial.printf("\n-- Sken %d.%d.%d.1-254 --\n",ip[0],ip[1],ip[2]);
+  int found = 0;
+  for (int i = 1; i < 255; i++){
+    IPAddress target(ip[0],ip[1],ip[2],i);
+    WiFiClient client;
+    if(client.connect(target,80,60)){
+      found++;
+      Serial.printf("\n + %s",target.toString().c_str());
+      if(target == ip) Serial.print("<< JA");
+      client.stop();
+    }
+  }
+  Serial.printf("\nNalezeno: %d zarizeni",found);
+}
+
+void setup() {
+ Serial.begin(115200);
+ delay(100);
+ WiFi.setHostname(myHostname);
+ Serial.print("Nastavuji jmeno na: ");
+ Serial.println(myHostname);
+ Serial.print("Pripojuji se k siti: ");
+ Serial.println(ssid);
+ WiFi.begin(ssid,password);
+ while (WiFi.status() != WL_CONNECTED) {
+  delay(50);
+  Serial.print(".");
+ }
+ Serial.println("Pripojeno");
+ Serial.print("Moje IP adresa je ");
+ Serial.println(WiFi.localIP());
+ //HTPP Server i se základní odpovědí
+ server.on("/", []() {
+  server.send(200,"text/plain","ESP32: " + device_name +"\nIP: "+ WiFi.localIP().toString());
+ });
+ server.begin();
+ Serial.println("HTTP server zapnuty na portu 80 pro zjisteni na siti");
+ scanNetwork();
+}
+
+void loop() {
+  server.handleClient();
+
+  //opakovaný sken
+  static unsigned long lastScan = 0;
+  if (millis() - lastScan > 20000){
+    lastScan = millis();
+    scanNetwork();
+  } 
+}

12_esp_sken/test/README

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+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html