ESPUI/examples/gui-generic-api/gui-generic-api.ino

#include <DNSServer.h>
#include <ESPUI.h>

const byte DNS_PORT = 53;
IPAddress apIP(192, 168, 1, 1);
DNSServer dnsServer;

#if defined(ESP32)
#include <WiFi.h>
#else
#include <ESP8266WiFi.h>
#endif

// true for verbose, false for quiet
ESPUIClass ESPUI(Verbosity::VerboseJSON);

const char *ssid = "ESPUI";
const char *password = "espui";
const char *hostname = "EspuiTest";

uint16_t button1;

void numberCall(Control *sender, int type) { Serial.println(sender->value); }

void textCall(Control *sender, int type) {
  Serial.print("Text: ID: ");
  Serial.print(sender->id);
  Serial.print(", Value: ");
  Serial.println(sender->value);
}

void slider(Control *sender, int type) {
  Serial.print("Slider: ID: ");
  Serial.print(sender->id);
  Serial.print(", Value: ");
  Serial.println(sender->value);
}

void buttonCallback(Control *sender, int type) {
  switch (type) {
  case B_DOWN:
    Serial.println("Button DOWN");
    break;

  case B_UP:
    Serial.println("Button UP");
    break;
  }
}

void buttonExample(Control *sender, int type) {
  switch (type) {
  case B_DOWN:
    Serial.println("Status: Start");
    ESPUI.updateControl("Status:", "Start");

    ESPUI.getControl(button1)->color = ControlColor::Carrot;
    ESPUI.updateControl(button1);
    break;

  case B_UP:
    Serial.println("Status: Stop");
    ESPUI.updateControl("Status:", "Stop");

    ESPUI.getControl(button1)->color = ControlColor::Peterriver;
    ESPUI.updateControl(button1);
    break;
  }
}

void padExample(Control *sender, int value) {
  switch (value) {
  case P_LEFT_DOWN:
    Serial.print("left down");
    break;

  case P_LEFT_UP:
    Serial.print("left up");
    break;

  case P_RIGHT_DOWN:
    Serial.print("right down");
    break;

  case P_RIGHT_UP:
    Serial.print("right up");
    break;

  case P_FOR_DOWN:
    Serial.print("for down");
    break;

  case P_FOR_UP:
    Serial.print("for up");
    break;

  case P_BACK_DOWN:
    Serial.print("back down");
    break;

  case P_BACK_UP:
    Serial.print("back up");
    break;

  case P_CENTER_DOWN:
    Serial.print("center down");
    break;

  case P_CENTER_UP:
    Serial.print("center up");
    break;
  }

  Serial.print(" ");
  Serial.println(sender->id);
}

void switchExample(Control *sender, int value) {
  switch (value) {
  case S_ACTIVE:
    Serial.print("Active:");
    break;

  case S_INACTIVE:
    Serial.print("Inactive");
    break;
  }

  Serial.print(" ");
  Serial.println(sender->id);
}

void selectExample(Control *sender, int value) {
  Serial.print("Select: ID: ");
  Serial.print(sender->id);
  Serial.print(", Value: ");
  Serial.println(sender->value);
}

void otherSwitchExample(Control *sender, int value) {
  switch (value) {
  case S_ACTIVE:
    Serial.print("Active:");
    break;

  case S_INACTIVE:
    Serial.print("Inactive");
    break;
  }

  Serial.print(" ");
  Serial.println(sender->id);
}

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

#if defined(ESP32)
  WiFi.setHostname(hostname);
#else
  WiFi.hostname(hostname);
#endif

  // try to connect to existing network
  WiFi.begin(ssid, password);
  Serial.print("\n\nTry to connect to existing network");

  {
    uint8_t timeout = 5;

    // Wait for connection, 2.5s timeout
    do {
      delay(500);
      Serial.print(".");
      timeout--;
    } while (timeout && WiFi.status() != WL_CONNECTED);

    // not connected -> create hotspot
    if (WiFi.status() != WL_CONNECTED) {
      Serial.print("\n\nCreating hotspot");

      WiFi.mode(WIFI_AP);
      WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
      WiFi.softAP(ssid);

      timeout = 5;

      do {
        delay(500);
        Serial.print(".");
        timeout--;
      } while (timeout);
    }
  }

  dnsServer.start(DNS_PORT, "*", apIP);

  Serial.println("\n\nWiFi parameters:");
  Serial.print("Mode: ");
  Serial.println(WiFi.getMode() == WIFI_AP ? "Station" : "Client");
  Serial.print("IP address: ");
  Serial.println(WiFi.getMode() == WIFI_AP ? WiFi.softAPIP() : WiFi.localIP());

  ESPUI.addControl(ControlType::Label, "Status:", "Stop", ControlColor::Turquoise);

  uint16_t select1 = ESPUI.addControl(ControlType::Select, "Select:", "", ControlColor::Alizarin, Control::noParent, &selectExample);

  ESPUI.addControl(ControlType::Option, "Option1", "Opt1", ControlColor::Alizarin, select1);
  ESPUI.addControl(ControlType::Option, "Option2", "Opt2", ControlColor::Alizarin, select1);
  ESPUI.addControl(ControlType::Option, "Option3", "Opt3", ControlColor::Alizarin, select1);

  ESPUI.addControl(ControlType::Text, "Text Test:", "a Text Field", ControlColor::Alizarin, Control::noParent, &textCall);

  ESPUI.addControl(ControlType::Label, "Millis:", "0", ControlColor::Emerald, Control::noParent);
  button1 = ESPUI.addControl(ControlType::Button, "Push Button", "Press", ControlColor::Peterriver, Control::noParent, &buttonCallback);
  ESPUI.addControl(ControlType::Button, "Other Button", "Press", ControlColor::Wetasphalt, Control::noParent, &buttonExample);
  ESPUI.addControl(ControlType::PadWithCenter, "Pad with center", "", ControlColor::Sunflower, Control::noParent, &padExample);
  ESPUI.addControl(ControlType::Pad, "Pad without center", "", ControlColor::Carrot, Control::noParent, &padExample);
  ESPUI.addControl(ControlType::Switcher, "Switch one", "", ControlColor::Alizarin, Control::noParent, &switchExample);
  ESPUI.addControl(ControlType::Switcher, "Switch two", "", ControlColor::None, Control::noParent, &otherSwitchExample);
  ESPUI.addControl(ControlType::Slider, "Slider one", "30", ControlColor::Alizarin, Control::noParent, &slider);
  ESPUI.addControl(ControlType::Slider, "Slider two", "100", ControlColor::Alizarin, Control::noParent, &slider);
  ESPUI.addControl(ControlType::Number, "Number:", "50", ControlColor::Alizarin, Control::noParent, &numberCall);

  /*
   * .begin loads and serves all files from PROGMEM directly.
   * If you want to serve the files from SPIFFS use ESPUI.beginSPIFFS
   * (.prepareFileSystem has to be run in an empty sketch before)
   */
  ESPUI.begin("ESPUI Control");
  /*
   * Optionally you can use HTTP BasicAuth. Keep in mind that this is NOT a
   * SECURE way of limiting access.
   * Anyone who is able to sniff traffic will be able to intercept your password
   * since it is transmitted in cleartext. Just add a username and password,
   * for example begin("ESPUI Control", "username", "password")
   */
}

void loop(void) {
  dnsServer.processNextRequest();

  static long oldTime = 0;
  static bool testSwitchState = false;

  if (millis() - oldTime > 5000) {
    ESPUI.updateControlValue(millisLabelId, String(millis()));
    testSwitchState = !testSwitchState;
    ESPUI.updateControlValue("Switch one", testSwitchState ? "1" : "0");
    oldTime = millis();
  }
}