circuitpython/tests/multi_bluetooth/ble_gap_device_name.py

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# Test BLE GAP device name get/set
from micropython import const
import time, machine, bluetooth
TIMEOUT_MS = 5000
_IRQ_CENTRAL_CONNECT = const(1)
_IRQ_CENTRAL_DISCONNECT = const(2)
_IRQ_PERIPHERAL_CONNECT = const(7)
_IRQ_PERIPHERAL_DISCONNECT = const(8)
_IRQ_GATTC_CHARACTERISTIC_RESULT = const(11)
_IRQ_GATTC_CHARACTERISTIC_DONE = const(12)
_IRQ_GATTC_READ_RESULT = const(15)
_IRQ_GATTC_READ_DONE = const(16)
GAP_DEVICE_NAME_UUID = bluetooth.UUID(0x2A00)
waiting_event = None
waiting_data = None
value_handle = 0
def irq(event, data):
global waiting_event, waiting_data, value_handle
if event == _IRQ_CENTRAL_CONNECT:
print("_IRQ_CENTRAL_CONNECT")
elif event == _IRQ_CENTRAL_DISCONNECT:
print("_IRQ_CENTRAL_DISCONNECT")
elif event == _IRQ_PERIPHERAL_CONNECT:
print("_IRQ_PERIPHERAL_CONNECT")
elif event == _IRQ_PERIPHERAL_DISCONNECT:
print("_IRQ_PERIPHERAL_DISCONNECT")
elif event == _IRQ_GATTC_CHARACTERISTIC_RESULT:
if data[-1] == GAP_DEVICE_NAME_UUID:
print("_IRQ_GATTC_CHARACTERISTIC_RESULT", data[-1])
value_handle = data[2]
elif event == _IRQ_GATTC_READ_RESULT:
print("_IRQ_GATTC_READ_RESULT", bytes(data[-1]))
if waiting_event is not None:
if isinstance(waiting_event, int) and event == waiting_event:
waiting_event = None
waiting_data = data
def wait_for_event(event, timeout_ms):
global waiting_event, waiting_data
waiting_event = event
waiting_data = None
t0 = time.ticks_ms()
while time.ticks_diff(time.ticks_ms(), t0) < timeout_ms:
if waiting_data:
return True
machine.idle()
return False
# Acting in peripheral role.
def instance0():
multitest.globals(BDADDR=ble.config("mac"))
# Test setting and getting the GAP device name before registering services.
ble.config(gap_name="GAP_NAME")
print(ble.config("gap_name"))
# Create an empty service and start advertising.
ble.gatts_register_services([])
print("gap_advertise")
multitest.next()
try:
# Do multiple iterations to test changing the name.
for iteration in range(2):
# Set the GAP device name and start advertising.
ble.config(gap_name="GAP_NAME{}".format(iteration))
print(ble.config("gap_name"))
ble.gap_advertise(20_000)
# Wait for central to connect, then wait for it to disconnect.
if not wait_for_event(_IRQ_CENTRAL_CONNECT, TIMEOUT_MS):
return
if not wait_for_event(_IRQ_CENTRAL_DISCONNECT, 4 * TIMEOUT_MS):
return
finally:
ble.active(0)
# Acting in central role.
def instance1():
multitest.next()
try:
for iteration in range(2):
# Wait for peripheral to start advertising.
time.sleep_ms(500)
# Connect to peripheral.
print("gap_connect")
ble.gap_connect(*BDADDR)
if not wait_for_event(_IRQ_PERIPHERAL_CONNECT, TIMEOUT_MS):
return
conn_handle, _, _ = waiting_data
if iteration == 0:
print("gattc_discover_characteristics")
ble.gattc_discover_characteristics(conn_handle, 1, 65535)
wait_for_event(lambda: value_handle, TIMEOUT_MS)
# Wait for all characteristic results to come in (there should be an event for it).
time.sleep_ms(500)
# Read the peripheral's GAP device name.
print("gattc_read")
ble.gattc_read(conn_handle, value_handle)
wait_for_event(_IRQ_GATTC_READ_RESULT, TIMEOUT_MS)
# Disconnect from peripheral.
print("gap_disconnect:", ble.gap_disconnect(conn_handle))
if not wait_for_event(_IRQ_PERIPHERAL_DISCONNECT, TIMEOUT_MS):
return
finally:
ble.active(0)
ble = bluetooth.BLE()
ble.active(1)
ble.irq(irq)