Serial Heartbeat rev_01

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    - Project: Serial Heartbeat
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2025-10-12 12:11:25

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* 1) Use only core Arduino libraries; no hardware; */
    /* match setup() and loop().  2) Reference */
    /* PROJECT_188; keep requirements generic until */
    /* components are defined.  3) Tie requirements to */
    /* LIBRARIES and PROTOTYPES; avoid sensor/actuator */
    /* claims. */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

/****** DEFINITION OF LIBRARIES *****/

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void reportStatus(void);

void setup(void)
{
    // Core Arduino initialization; no hardware components used
    Serial.begin(9600);
    // Do not wait for Serial readiness to avoid potential hangs on some boards
    Serial.println("PROJECT_188: Initializing (core Arduino, no hardware)");
    // Optional status report
    reportStatus();
}

/* The main program loop runs repeatedly. It prints a heartbeat every second
   to demonstrate non-hardware, library-based operation with the core Arduino API. */
void loop(void)
{
    static unsigned long prevMillis = 0;
    static unsigned long heartbeat = 0;
    const unsigned long interval = 1000; // 1 second

    unsigned long current = millis();
    if (current - prevMillis >= interval) {
        prevMillis = current;
        headbeat++;
        Serial.print("PROJECT_188 heartbeat: ");
        Serial.println(heartbeat);
    }
}

void reportStatus(void)
{
    // Report current generic status and library usage
    Serial.println("PROJECT_188 status: OK");
    Serial.println("LIBRARIES: Core Arduino");
    Serial.println("PROTOTYPES: setup, loop, reportStatus");
}

/* END CODE */