Event from PD to CP is not working

[MarosMotaj]

Hi All,

Thanks for great work. I try to sent event from PD (ATTiny3224) to CP (ESP32-WROOM32). I have no ERROR but the event will not be sent. I am using Platformio. Commands from CP to PD are working. Also RS485 communication is working on both sides. Can you please help me solve the problem ? Thank you for yours time.

void send_button_event(OSDP::PeripheralDevice &pd, uint8_t keycode) 
{
    Serial1.println("Button Pressed");

    pd.flush_events();

    osdp_event event;
    osdp_event *p_event = &event;
    
    p_event->type = OSDP_EVENT_KEYPRESS;
    p_event->keypress.reader_no = 0; // 0 - This device
    p_event->keypress.length = 1;    // Single key press
    p_event->keypress.data[0] = keycode; // Keycode of the pressed button

    // Set RS485 module to Transmit mode
    digitalWrite(RS485_DIRECTION_PIN, RS485_TRANSMIT);
    delayMicroseconds(200);
    
    // Notify the event
    if (pd.notify_event(p_event) == 0) {
        Serial1.println("Button event sent successfully.");
    } else {
        Serial1.println("Failed to notify button event.");
    }
    
    // Flush events and reset RS485 to Receive mode
    Serial0.flush();
    digitalWrite(RS485_DIRECTION_PIN, RS485_RECEIVE);
}

void loop() 
{
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval_2000) {
        previousMillis = currentMillis;
        send_button_event(pd, 0x30);
    }
    
    unsigned long previousDelayMillis = 0;
    if (currentMillis - previousDelayMillis >= interval_50) {
        previousDelayMillis = currentMillis;
        pd.refresh();
    }
}