from machine import Pin
from machine import Timer
from time import sleep_ms
import ubluetooth

class ESP32_BLE():
    def __init__(self, name):
        
#https://www.banggood.com/ESP-32S-ESP32-Development-Board-Wireless-WiFi+Bluetooth-2-in-1-Dual-Core-CPU-Low-Power-Control-Board-ESP-32S-p-1883630.html
        #self.tipka=Pin(0,Pin.IN, Pin.PULL_DOWN);self.modra=Pin(2,Pin.OUT);
#https://www.banggood.com/Ai-Thinker-ESP-C3-12F-Kit-Series-Development-Board-Base-on-ESP32-C3-Chip-p-1901699.html
        self.tipka=Pin(9,Pin.IN, Pin.PULL_DOWN);self.rdeca=Pin(3,Pin.OUT);self.zelena=Pin(4,Pin.OUT);self.modra=Pin(5,Pin.OUT);

        self.timer1 = Timer(0)        
        self.name = name
        self.ble = ubluetooth.BLE()
        self.ble.active(True)
        self.disconnected()
        self.ble.irq(self.ble_irq)
        self.register()
        self.advertiser()
    def connected(self):
        global is_ble_connected
        is_ble_connected = True
        self.modra.value(1)
        self.timer1.deinit()
    def disconnected(self):
        global is_ble_connected
        is_ble_connected = False
        self.timer1.init(period=100, mode=Timer.PERIODIC, callback=lambda t: self.modra.value(not self.modra.value()))
    def ble_irq(self, event, data):
        global ble_msg       
        if event == 1:
            self.connected()
        elif event == 2:
            self.advertiser()
            self.disconnected()
        elif event == 3:         
            buffer = self.ble.gatts_read(self.rx)
            ble_msg = buffer.decode('UTF-8').strip()           
    def register(self):        
        NUS_UUID = '6E400001-B5A3-F393-E0A9-E50E24DCCA9E'
        RX_UUID = '6E400002-B5A3-F393-E0A9-E50E24DCCA9E'
        TX_UUID = '6E400003-B5A3-F393-E0A9-E50E24DCCA9E'            
        BLE_NUS = ubluetooth.UUID(NUS_UUID)
        BLE_RX = (ubluetooth.UUID(RX_UUID), ubluetooth.FLAG_WRITE)
        BLE_TX = (ubluetooth.UUID(TX_UUID), ubluetooth.FLAG_NOTIFY)
        BLE_UART = (BLE_NUS, (BLE_TX, BLE_RX,))
        SERVICES = (BLE_UART, )
        ((self.tx, self.rx,), ) = self.ble.gatts_register_services(SERVICES)
    def send(self, data):
        self.ble.gatts_notify(0, self.tx, data + '\n')
    def advertiser(self):
        name = bytes(self.name, 'UTF-8')
        adv_data = bytearray('\x02\x01\x02') + bytearray((len(name) + 1, 0x09)) + name
        self.ble.gap_advertise(100, adv_data)
        print(adv_data)
        print("\r\n")
        
ble_msg = "";is_ble_connected = False        
ble = ESP32_BLE("ESP32BLE")
while True:
    if is_ble_connected:
        ble.send('Pozdrav')
    sleep_ms(1000)