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# Test for sending notifications to subscribed clients.
from micropython import const
import time, machine, bluetooth
TIMEOUT_MS = 5000
_IRQ_CENTRAL_CONNECT = const(1)
_IRQ_CENTRAL_DISCONNECT = const(2)
_IRQ_GATTS_WRITE = const(3)
_IRQ_PERIPHERAL_CONNECT = const(7)
_IRQ_PERIPHERAL_DISCONNECT = const(8)
_IRQ_GATTC_CHARACTERISTIC_RESULT = const(11)
_IRQ_GATTC_CHARACTERISTIC_DONE = const(12)
_IRQ_GATTC_DESCRIPTOR_RESULT = const(13)
_IRQ_GATTC_DESCRIPTOR_DONE = const(14)
_IRQ_GATTC_READ_RESULT = const(15)
_IRQ_GATTC_READ_DONE = const(16)
_IRQ_GATTC_WRITE_DONE = const(17)
_IRQ_GATTC_NOTIFY = const(18)
_IRQ_GATTC_INDICATE = const(19)
_CCCD_UUID = bluetooth.UUID(const(0x2902))
SERVICE_UUID = bluetooth.UUID("A5A5A5A5-FFFF-9999-1111-5A5A5A5A5A5A")
CHAR_UUID = bluetooth.UUID("00000000-1111-2222-3333-444444444444")
CHAR = (
CHAR_UUID,
bluetooth.FLAG_READ | bluetooth.FLAG_WRITE | bluetooth.FLAG_NOTIFY | bluetooth.FLAG_INDICATE,
)
SERVICE = (
SERVICE_UUID,
(CHAR,),
)
SERVICES = (SERVICE,)
waiting_events = {}
def irq(event, data):
if event == _IRQ_CENTRAL_CONNECT:
print("_IRQ_CENTRAL_CONNECT")
waiting_events[event] = data[0]
elif event == _IRQ_CENTRAL_DISCONNECT:
print("_IRQ_CENTRAL_DISCONNECT")
elif event == _IRQ_GATTS_WRITE:
print("_IRQ_GATTS_WRITE", ble.gatts_read(data[-1]))
elif event == _IRQ_PERIPHERAL_CONNECT:
print("_IRQ_PERIPHERAL_CONNECT")
waiting_events[event] = data[0]
elif event == _IRQ_PERIPHERAL_DISCONNECT:
print("_IRQ_PERIPHERAL_DISCONNECT")
elif event == _IRQ_GATTC_CHARACTERISTIC_RESULT:
# conn_handle, end_handle, value_handle, properties, uuid = data
if data[-1] == CHAR_UUID:
print("_IRQ_GATTC_CHARACTERISTIC_RESULT", data[-1])
waiting_events[event] = (data[2], data[1])
else:
return
elif event == _IRQ_GATTC_CHARACTERISTIC_DONE:
print("_IRQ_GATTC_CHARACTERISTIC_DONE")
elif event == _IRQ_GATTC_DESCRIPTOR_RESULT:
# conn_handle, dsc_handle, uuid = data
if data[-1] == _CCCD_UUID:
print("_IRQ_GATTC_DESCRIPTOR_RESULT", data[-1])
waiting_events[event] = data[1]
else:
return
elif event == _IRQ_GATTC_DESCRIPTOR_DONE:
print("_IRQ_GATTC_DESCRIPTOR_DONE")
elif event == _IRQ_GATTC_READ_RESULT:
print("_IRQ_GATTC_READ_RESULT", bytes(data[-1]))
elif event == _IRQ_GATTC_READ_DONE:
print("_IRQ_GATTC_READ_DONE", data[-1])
elif event == _IRQ_GATTC_WRITE_DONE:
print("_IRQ_GATTC_WRITE_DONE", data[-1])
elif event == _IRQ_GATTC_NOTIFY:
print("_IRQ_GATTC_NOTIFY", bytes(data[-1]))
elif event == _IRQ_GATTC_INDICATE:
print("_IRQ_GATTC_NOTIFY", bytes(data[-1]))
if event not in waiting_events:
waiting_events[event] = None
def wait_for_event(event, timeout_ms):
t0 = time.ticks_ms()
while time.ticks_diff(time.ticks_ms(), t0) < timeout_ms:
if event in waiting_events:
return waiting_events.pop(event)
machine.idle()
raise ValueError("Timeout waiting for {}".format(event))
# Acting in peripheral role.
def instance0():
multitest.globals(BDADDR=ble.config("mac"))
((char_handle,),) = ble.gatts_register_services(SERVICES)
print("gap_advertise")
ble.gap_advertise(20_000, b"\x02\x01\x06\x04\xffMPY") # \x04\x09MPY
multitest.next()
try:
# Write initial characteristic value (will be read by client).
ble.gatts_write(char_handle, "periph0") ###
# Wait for central to connect to us.
conn_handle = wait_for_event(_IRQ_CENTRAL_CONNECT, TIMEOUT_MS * 10)
# A
# Wait for a write to the characteristic from the central (to synchronise).
wait_for_event(_IRQ_GATTS_WRITE, TIMEOUT_MS)
print("sync A")
# This should be local-only.
ble.gatts_write(char_handle, "periph1")
time.sleep_ms(100)
# Update local-only, then force notify.
ble.gatts_write(char_handle, "periph2")
ble.gatts_notify(conn_handle, char_handle) ###
time.sleep_ms(100)
# Update local and notify subscribers. No notification should be sent.
ble.gatts_write(char_handle, "periph3", True)
time.sleep_ms(100)
multitest.broadcast("A")
# B
# Synchronise with the client (which should now be subscribed for notify).
wait_for_event(_IRQ_GATTS_WRITE, TIMEOUT_MS)
print("sync B")
# This should be local-only (send_update=False).
ble.gatts_write(char_handle, "periph4", False)
time.sleep_ms(100)
# This should notify the subscribed client.
ble.gatts_write(char_handle, "periph5", True) ###
time.sleep_ms(100)
multitest.broadcast("B")
# C
# Synchronise with the client (which should now be subscribed for indicate).
wait_for_event(_IRQ_GATTS_WRITE, TIMEOUT_MS)
print("sync C")
# This should be local-only (send_update=False).
ble.gatts_write(char_handle, "periph6", False)
time.sleep_ms(100)
# This should indicate the subscribed client.
ble.gatts_write(char_handle, "periph7", True) ###
time.sleep_ms(100)
multitest.broadcast("C")
# D
# Synchronise with the client (which should now be unsubscribed).
wait_for_event(_IRQ_GATTS_WRITE, TIMEOUT_MS)
print("sync D")
# This should be local-only (send_update=False).
ble.gatts_write(char_handle, "periph8", False)
time.sleep_ms(100)
# This should be local-only (no more subscribers).
ble.gatts_write(char_handle, "periph9", True)
time.sleep_ms(100)
# Update local-only, then another force notify.
ble.gatts_write(char_handle, "periph10")
ble.gatts_notify(conn_handle, char_handle) ###
time.sleep_ms(100)
multitest.broadcast("D")
# Wait for the central to disconnect.
wait_for_event(_IRQ_CENTRAL_DISCONNECT, TIMEOUT_MS)
finally:
ble.active(0)
# Acting in central role.
def instance1():
multitest.next()
try:
# Connect to peripheral and then disconnect.
print("gap_connect")
ble.gap_connect(*BDADDR)
conn_handle = wait_for_event(_IRQ_PERIPHERAL_CONNECT, TIMEOUT_MS)
# Discover characteristics.
ble.gattc_discover_characteristics(conn_handle, 1, 65535)
value_handle, end_handle = wait_for_event(_IRQ_GATTC_CHARACTERISTIC_RESULT, TIMEOUT_MS)
wait_for_event(_IRQ_GATTC_CHARACTERISTIC_DONE, TIMEOUT_MS)
# Discover CCCD.
ble.gattc_discover_descriptors(conn_handle, value_handle, end_handle)
cccd_handle = wait_for_event(_IRQ_GATTC_DESCRIPTOR_RESULT, TIMEOUT_MS)
wait_for_event(_IRQ_GATTC_DESCRIPTOR_DONE, TIMEOUT_MS)
# Issue read of characteristic, should get initial value.
print("gattc_read")
ble.gattc_read(conn_handle, value_handle)
wait_for_event(_IRQ_GATTC_READ_RESULT, TIMEOUT_MS)
# While the four states are active, all incoming notifications
# and indications will be printed by the event handler. We
# should only expect to see certain ones.
# Start unsubscribed.
# Write to the characteristic (triggers A).
print("gattc_write")
ble.gattc_write(conn_handle, value_handle, "central0", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Wait for A to complete.
multitest.wait("A")
# Subscribe for notify.
ble.gattc_write(conn_handle, cccd_handle, b"\x01\x00", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Write to the characteristic (triggers B).
print("gattc_write")
ble.gattc_write(conn_handle, value_handle, "central1", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Wait for B to complete.
multitest.wait("B")
# Subscribe for indicate.
ble.gattc_write(conn_handle, cccd_handle, b"\x02\x00", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Write to the characteristic (triggers C).
print("gattc_write")
ble.gattc_write(conn_handle, value_handle, "central2", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Wait for C to complete.
multitest.wait("C")
# Unsubscribe.
ble.gattc_write(conn_handle, cccd_handle, b"\x00\x00", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Write to the characteristic (triggers D).
print("gattc_write")
ble.gattc_write(conn_handle, value_handle, "central3", 1)
wait_for_event(_IRQ_GATTC_WRITE_DONE, TIMEOUT_MS)
# Wait for D to complete.
multitest.wait("D")
# Disconnect from peripheral.
print("gap_disconnect:", ble.gap_disconnect(conn_handle))
wait_for_event(_IRQ_PERIPHERAL_DISCONNECT, TIMEOUT_MS)
finally:
ble.active(0)
ble = bluetooth.BLE()
ble.active(1)
ble.irq(irq)
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