GATTCConnection

GATTC Connection

The GATT Client is the device that requests data from the server, otherwise known as the master device (commonly this might be a phone/tablet/PC). All transactions are initiated by the master, which receives a response from the slave.

Methods

connection.disconnect()

Closes the BLE connection. Returns None.

connection.isconnected()

Returns True if the connection is still open. False otherwise.

Example:


from network import Bluetooth
import ubinascii
bluetooth = Bluetooth()

# scan until we can connect to any BLE device around
bluetooth.start_scan(-1)
adv = None
while True:
    adv = bluetooth.get_adv()
    if adv:
        try:
            bluetooth.connect(adv.mac)
        except:
            # start scanning again
            bluetooth.start_scan(-1)
            continue
        break
print("Connected to device with addr = {}".format(ubinascii.hexlify(adv.mac)))

connection.services()

Performs a service search on the connected BLE peripheral (server) a returns a list containing objects of the class GATTCService if the search succeeds.

Example:

# assuming that a BLE connection is already open
services = connection.services()
print(services)
for service in services:
    print(service.uuid())