webserver_led.ino

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#include <ELClient.h>
#include <ELClientWebServer.h>
 
// flash LED on PIN 13
#define LED_PIN 13
 
// Initialize a connection to esp-link using the normal hardware serial port
//
// DEBUG is disasbled as
// - packet logging is slow and UART receive buffer can overrun (HTML form submission)
ELClient esp(&Serial);
 
// Initialize the Web-Server client
ELClientWebServer webServer(&esp);
 
void ledPageLoadAndRefreshCb(char * url)
{
  if( digitalRead(LED_PIN) )
    webServer.setArgString(F("text"), F("LED is on"));
  else
    webServer.setArgString(F("text"), F("LED is off"));
}
 
void ledButtonPressCb(char * btnId)
{
  String id = btnId;
  if( id == F("btn_on") )
    digitalWrite(LED_PIN, true);
  else if( id == F("btn_off") )
    digitalWrite(LED_PIN, false);
}
 
// Callback made form esp-link to notify that it has just come out of a reset. This means we
// need to initialize it!
void resetCb(void) {
  Serial.println("EL-Client (re-)starting!");
  bool ok = false;
  do {
    ok = esp.Sync();      // sync up with esp-link, blocks for up to 2 seconds
    if (!ok) Serial.println("EL-Client sync failed!");
  } while(!ok);
  Serial.println("EL-Client synced!");
  
  webServer.setup();
}
 
void setup()
{
  Serial.begin(115200);
  
  URLHandler *ledHandler = webServer.createURLHandler(F("/SimpleLED.html.json"));
  ledHandler->loadCb.attach(&ledPageLoadAndRefreshCb);
  ledHandler->refreshCb.attach(&ledPageLoadAndRefreshCb);
  ledHandler->buttonCb.attach(&ledButtonPressCb);
 
  esp.resetCb = resetCb;
  resetCb();
}
 
void loop()
{
  esp.Process();
}