OTA Initialization rev_13

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    - Project: OTA Initialization
    - Source Code NOT compiled for: Arduino Opta WiFi
    - Source Code created on: 2025-10-05 15:22:15

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Detect a debounced push-button event on A0 using */
    /* EasyButton; the input uses INPUT_PULLUP, so a */
    /* pressed state is LOW and should trigger the system */
    /* logic. Integrate flash over the air. */
/****** END SYSTEM REQUIREMENTS *****/


/****** DEFINITION OF LIBRARIES *****/
#include <EasyButton.h>
#include <POTA.h>

// If a secrets.h file is provided in the project, you may override these values by
// defining the following macros in that file. If not present, defaults are used.
#ifndef WIFI_SSID
#define WIFI_SSID "your-ssid"
#define WIFI_PASSWORD "your-password"
#define DEVICE_TYPE "ARDUINO_OPTA_WIFI"
#define FIRMWARE_VERSION "0.0.0"
#define AUTH_TOKEN "your-auth-token"
#define SERVER_SECRET "your-server-secret"
#endif

// Pointers to credentials used by POTA. These resolve to string literals defined above.
const char* wifiSSID = WIFI_SSID;
const char* wifiPassword = WIFI_PASSWORD;
const char* deviceType = DEVICE_TYPE;
const char* firmwareVersion = FIRMWARE_VERSION;
const char* authToken = AUTH_TOKEN;
const char* serverSecret = SERVER_SECRET;

// Debounced push-button on A0
static const uint8_t BUTTON_PIN_A0 = A0;
EasyButton button(BUTTON_PIN_A0);

// OTA controller instance
POTA ota;

// Callback invoked when the button is pressed
void buttonPressed()
{
  Serial.println("Button pressed");
  Serial.println("Checking for OTA update...");
  POTAError err = ota.checkAndPerformOTA();
  if (err == POTAError::NO_UPDATE_AVAILABLE)
  {
    Serial.println("No OTA update available");
  }
  else if (err != POTAError::SUCCESS)
  {
    Serial.print("OTA error: ");
    Serial.println(ota.errorToString(err));
  }
  else
  {
    Serial.println("OTA update finished or in progress");
  }
}

void setup(void)
{
  // Initialize Serial for debug purposes
  Serial.begin(115200);
  while (!Serial) { /* wait for serial port */ }
  Serial.println();
  Serial.println(">>> POTA + EasyButton on A0 test <<<");

  // 1️⃣ Initialize the button on A0 with INPUT_PULLUP (pressed state = LOW)
  pinMode(BUTTON_PIN_A0, INPUT_PULLUP);
  button.begin();
  button.onPressed(buttonPressed);

  // 2️⃣ Initialize OTA client with credentials (from secrets.h if present)
  Serial.println("Initializing OTA...");
  POTAError otaInit = ota.begin(wifiSSID, wifiPassword, deviceType, firmwareVersion, authToken, serverSecret);
  if (otaInit != POTAError::SUCCESS)
  {
    Serial.print("OTA begin failed: ");
    Serial.println(ota.errorToString(otaInit));
  }
  else
  {
    Serial.println("OTA initialized");
  }

  // Optional: perform one-shot OTA check on startup
  POTAError initialCheck = ota.checkAndPerformOTA();
  if (initialCheck == POTAError::NO_UPDATE_AVAILABLE)
  {
    Serial.println("Firmware already up to date");
  }
  else if (initialCheck != POTAError::SUCCESS)
  {
    Serial.print("OTA error: ");
    Serial.println(ota.errorToString(initialCheck));
  }
}

void loop(void)
{
  // Continuously read the status of the button to detect presses
  button.read();
}

/* END CODE */