14)
# perform a device inquiry on bluetooth device #0
# The inquiry should last 8 * 1.28 = 10.24 seconds
# before the inquiry is performed, bluez should flush its cache of
# previously discovered devices
flt = ble.bluez.hci_filter_new()
ble.bluez.hci_filter_all_events(flt)
ble.bluez.hci_filter_set_ptype(flt, ble.bluez.HCI_EVENT_PKT)
sock.setsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER, flt)
while True:
# parse ble event
parse_events(sock)
if flag_update_sensor_status:
print_sensor_state()
flag_update_sensor_status = False
except Exception as e:
print "Exception: " + str(e)
import traceback
traceback.print_exc()
sys.exit(1)
finally:
if flag_scanning_started:
# restore old filter setting
sock.setsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER,
old_filter)
ble.hci_le_disable_scan(sock)
print "Exit"
def parse_events(sock, loop_count=100):
flt = bluez.hci_filter_new()
bluez.hci_filter_all_events(flt)
bluez.hci_filter_set_ptype(flt, bluez.HCI_EVENT_PKT)
sock.setsockopt(bluez.SOL_HCI, bluez.HCI_FILTER, flt)
for i in range(loop_count):
pkt = sock.recv(255)
parsed_packet = ble.hci_le_parse_response_packet(pkt)
if (
"bluetooth_le_subevent_name" in parsed_packet
and parsed_packet["bluetooth_le_subevent_name"] == "EVT_LE_ADVERTISING_REPORT"
):
for report in parsed_packet["advertising_reports"]:
print "Found BLE device:", report["peer_bluetooth_address"]
for k, v in report.items():
print "\t%s: %s" % (k, v)
dev_id = 0
try:
sock = bluez.hci_open_dev(dev_id)
except:
print "Error accessing bluetooth device", dev_id
sys.exit(1)
ble.hci_le_set_scan_parameters(sock)
ble.hci_le_enable_scan(sock)
parse_events(sock, 30)
ble.hci_le_disable_scan(sock)
def evsensor():
try:
# process command line arguments
debug = False
args = arg_parse()
if args.debug:
debug = True
# reset bluetooth functionality
try:
if debug:
print "-- reseting bluetooth device"
ble.reset_hci()
if debug:
print "-- reseting bluetooth device : success"
except Exception as e:
print "error enabling bluetooth device"
print str(e)
sys.exit(1)
# initialize bluetooth socket
try:
if debug:
print "-- open bluetooth device"
sock = ble.bluez.hci_open_dev(conf.BT_DEV_ID)
if debug:
print "-- ble thread started"
except Exception as e:
print "error accessing bluetooth device: ", str(conf.BT_DEV_ID)
print str(e)
sys.exit(1)
# set ble scan parameters
try:
if debug:
print "-- set ble scan parameters"
ble.hci_le_set_scan_parameters(sock)
if debug:
print "-- set ble scan parameters : success"
except Exception as e:
print "failed to set scan parameter!!"
print str(e)
sys.exit(1)
# start ble scan
try:
if debug:
print "-- enable ble scan"
ble.hci_le_enable_scan(sock)
if debug:
print "-- ble scan started"
except Exception as e:
print "failed to activate scan!!"
print str(e)
sys.exit(1)
global flag_scanning_started
flag_scanning_started = True
print("envsensor_observer : complete initialization")
print ""
# preserve old filter setting
old_filter = sock.getsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER,
14)
# perform a device inquiry on bluetooth device #0
# The inquiry should last 8 * 1.28 = 10.24 seconds
# before the inquiry is performed, bluez should flush its cache of
# previously discovered devices
flt = ble.bluez.hci_filter_new()
ble.bluez.hci_filter_all_events(flt)
ble.bluez.hci_filter_set_ptype(flt, ble.bluez.HCI_EVENT_PKT)
sock.setsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER, flt)
# activate timer for sensor status evaluation
timer = threading.Timer(conf.CHECK_SENSOR_STATE_INTERVAL_SECONDS,
eval_sensor_state)
timer.setDaemon(True)
timer.start()
global flag_update_sensor_status
while True:
# parse ble event
parse_events(sock)
if flag_update_sensor_status:
print_sensor_state()
flag_update_sensor_status = False
except Exception as e:
print "Exception: " + str(e)
import traceback
traceback.print_exc()
sys.exit(1)
finally:
if flag_scanning_started:
# restore old filter setting
sock.setsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER,
old_filter)
ble.hci_le_disable_scan(sock)
print "Exit"
def evsensor():
# print('called')
sys.path.append("..")
import util
try:
# process command line arguments
debug = False
args = arg_parse()
if args.debug:
debug = False
# reset bluetooth functionality
try:
if debug:
print "-- reseting bluetooth device"
ble.reset_hci()
if debug:
print "-- reseting bluetooth device : success"
except Exception as e:
util.Logprint(4, "error enabling bluetooth device")
# print "error enabling bluetooth device"
# print str(e)
sys.exit(1)
# initialize bluetooth socket
try:
if debug:
print "-- open bluetooth device"
sock = ble.bluez.hci_open_dev(conf.BT_DEV_ID)
if debug:
print "-- ble thread started"
except Exception as e:
util.Logprint(4, "error accessing bluetooth device")
# print "error accessing bluetooth device: ", str(conf.BT_DEV_ID)
# print str(e)
sys.exit(1)
# set ble scan parameters
try:
if debug:
print "-- set ble scan parameters"
ble.hci_le_set_scan_parameters(sock)
if debug:
print "-- set ble scan parameters : success"
except Exception as e:
util.Logprint(4, "failed to set scan parameter!!")
# print "failed to set scan parameter!!"
# print str(e)
sys.exit(1)
# start ble scan
try:
if debug:
print "-- enable ble scan"
ble.hci_le_enable_scan(sock)
if debug:
print "-- ble scan started"
except Exception as e:
util.Logprint(4, "failed to activate scan!!")
# print "failed to activate scan!!"
# print str(e)
sys.exit(1)
global flag_scanning_started
flag_scanning_started = True
util.Logprint(1, "envsensor_observer : complete initialization")
# print ("envsensor_observer : complete initialization")
# print ""
# preserve old filter setting
old_filter = sock.getsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER,
14)
# perform a device inquiry on bluetooth device #0
# The inquiry should last 8 * 1.28 = 10.24 seconds
# before the inquiry is performed, bluez should flush its cache of
# previously discovered devices
flt = ble.bluez.hci_filter_new()
ble.bluez.hci_filter_all_events(flt)
ble.bluez.hci_filter_set_ptype(flt, ble.bluez.HCI_EVENT_PKT)
sock.setsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER, flt)
# activate timer for sensor status evaluation
with open('/home/nvidia/Horus/config.cnf') as f:
cnf = json.load(f)
timer = threading.Timer(
int(cnf['check_sensor_state_interval_seconds']), eval_sensor_state)
timer.setDaemon(True)
timer.start()
global flag_update_sensor_status
while True:
# parse ble event
parse_events(sock)
if flag_update_sensor_status:
# print_sensor_state()
flag_update_sensor_status = False
except Exception as e:
# print "Exception: " + str(e)
import traceback
traceback.print_exc()
sys.exit(1)
finally:
if flag_scanning_started:
# restore old filter setting
sock.setsockopt(ble.bluez.SOL_HCI, ble.bluez.HCI_FILTER,
old_filter)
ble.hci_le_disable_scan(sock)
