from adafruit_ble import BLERadio
from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
from adafruit_ble.services.nordic import UARTService

ble = BLERadio()
while True:
    while ble.connected and any(
        UARTService in connection for connection in ble.connections
    ):
        for connection in ble.connections:
            if UARTService not in connection:
                continue
            uart = connection[UARTService]
            while ble.connected:
                one_byte = uart.readline()
                if one_byte:
                    print(one_byte.decode().strip())

    print("disconnected, scanning")
    for advertisement in ble.start_scan(ProvideServicesAdvertisement, timeout=1):
        if UARTService not in advertisement.services:
            continue
        ble.connect(advertisement)
        print("connected")
        break
    ble.stop_scan()