def scan_for_iBeacon_frames(duration_ms: int):
"""
Scan for iBeacon frames
:param duration_ms: Time in milliseconds to scan for.
"""
# Configure scan for the entire window
with ble.gap_scan(duration_ms=duration_ms,
interval_us=2500,
window_us=2500) as scan:
iBeacon_count = 0
beacon_count = 0
while not scan.stopped():
for frame in scan.get():
beacon_count += 1
payload = frame['payload']
if iBeacon.is_proximity_beacon(payload):
(uuid, power, major,
minor) = iBeacon.parse_proximity_beacon(payload)
# Calculate approximate distance
calib_rssi = power - 256
rssi = frame['rssi']
db_ratio = float(calib_rssi - rssi)
linear_ratio = 10.0**(db_ratio / 10.0)
distance = linear_ratio**0.5
addr = binascii.hexlify(frame['address']).decode()
uuid = binascii.hexlify(uuid).decode()
print("")
print("Got iBeacon from {}".format(addr))
print("distance={:0.2f} meters (approximate)".format(
distance))
print("UUID={} major={} minor={}".format(
uuid, major, minor))
print("RSSI={} calibrated_RSSI={} calibrated_power={}".
format(rssi, calib_rssi, power))
iBeacon_count += 1
print("Found {} iBeacon frames out of a total {} beacon frames".format(
iBeacon_count, beacon_count))
def _find_thunderboard():
scanner = ble.gap_scan(200, interval_us=2500, window_us=2500)
for adv in scanner:
if b"Thunder Sense" in adv['payload']:
return adv['address']
return None
# SOFTWARE.
from digi import ble
def form_mac_address(addr: bytes) -> str:
return ":".join('{:02x}'.format(b) for b in addr)
# Turn on Bluetooth
ble.active(True)
print("Started Bluetooth with address of: {}".format(form_mac_address(ble.config("mac"))))
scanner = None
try:
# Start a scan to run for 30 seconds
scanner = ble.gap_scan(30000, interval_us=50000, window_us=50000)
# Loop through all advertisements until the scan has stopped.
for adv in scanner:
print(adv)
finally:
if scanner is not None:
scanner.stop()
# Scan with a context manager this time.
with ble.gap_scan(30000, interval_us=50000, window_us=50000) as scanner:
# Loop through the available advertisements, blocking if there are none. Exits when the scan stops.
for adv in scanner:
print(adv)
# Leaving the context would automatically end the scan by an implicit scanner.stop()
def find_advertiser(substring):
scanner = ble.gap_scan(100, interval_us=2500, window_us=2500)
for adv in scanner:
if substring in adv['payload']:
return adv['address']
return None