SimulatorTask.cpp

// An EventQueue is a very useful construct in Mbed OS, it allows you to schedule events
// and to defer from one context to another (e.g. from ISR to normal thread) without
// writing your own state machines, and while maintaining context.
// https://os.mbed.com/docs/v5.6/tutorials/the-eventqueue-api.html
EventQueue queue;

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led4(LED4);

InterruptIn btn(BUTTON1);

//Setup the Sensor
Sht31 sht31(I2C_SDA, I2C_SCL);

float temp;
float humidity;
int eventId = 0;

void blink_led() {
    led1 = !led1;
    temp = sht31.readTemperature ();
    humidity = sht31.readHumidity();
    printf("Temp  %.2f  Humidity  %.2f\n", temp, humidity);
}

void blinkWarning(){
    led4 = !led4;
}

void checkTemps(){
    printf("Checking Temperatures\n");
    if (temp > 30.0){
        led2 = 1;
        printf("Too Hot!!!");
    }
    else{
        led2 = 0;
    }
    if (temp < 5.0){
        printf ("Too Cold!!\n");
        if (eventId == 0){
            eventId = queue.call_every(500, &blinkWarning);
            printf("Sub Event Triggered Id is %d\n", eventId);
        }
    }
    else{
        if (eventId > 0){
            queue.cancel(eventId);
            led4 = 0;
            eventId = 0;
        }
    }
}

// This does not run in an ISR, so it's safe to use `printf` or other blocking calls
void btn_handler() {
    printf("Button Pressed\n");

    led2 = !led2;
}



int main() {
    // Schedule an event to run every second
    queue.call_every(1000, &blink_led);
    queue.call_every(1000, &checkTemps);
    // Normally code in the `fall` handler runs in an ISR,
    // but you can directly defer it to the thread that runs the queue
    btn.rise(queue.event(&btn_handler));

    // Because the simulator does not support multiple threads,
    // we have to call dispatch_forever from the main thread.
    // Typically you'd run this on a separate thread within Mbed's RTOS.
    queue.dispatch_forever();
}