Bluetooth services is not started

Nagarjuna Reddy

@nagarjuna-reddy
services = conn.services()
print("get service......") why its not printing

Nagarjuna Reddy

hi livius iam checking what you said that but not working so please help me
program

def ble_reciever(self):

    bluetooth = Bluetooth()
    print("Scanning 4509 client")
    bluetooth.start_scan(-1)

    while True:
        adv = bluetooth.get_adv()
        #if adv:
            #print("Found adv in 4509 client")
            # try to get the complete name
            #print(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL))

            # try to get the manufacturer data (Apple's iBeacon data is sent here)
            #print(binascii.hexlify(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_MANUFACTURER_DATA)))


        if adv and bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL) == 'LoPy':
            print("connecting rr Lopy in 4509 client")

            print("connected Lopy in 4509 client")
            while True:
                conn = bluetooth.connect(adv.mac)
                services = conn.services()
                
                for service in services:
                    #time.sleep(3)
                    print("start reading..")
                    if type(service.uuid()) == bytes:
                        print('Reading chars from service = {}'.format(service.uuid()))
                    else:
                        print('Reading chars from service = %x' % service.uuid())
                    chars = service.characteristics()
                    for char in chars:
                        if (char.properties() & Bluetooth.PROP_READ):
                            print('char {} value = {}'.format(char.uuid(), char.read()))
            conn.disconnect()
            print("Disconnected 4509 client")
            break
        else:
            time.sleep(0.050)

def ble_transmitter(self):

    print('Advertising Bluetooth...')
    bluetooth = Bluetooth()
    bluetooth.set_advertisement(name='LoPy', service_uuid=b'1234567890abcdef')

    def conn_cb (bt_o):
        events = bt_o.events()
        if  events & Bluetooth.CLIENT_CONNECTED:
            print("Client connected")
        elif events & Bluetooth.CLIENT_DISCONNECTED:
            print("Client disconnected")

    bluetooth.callback(trigger=Bluetooth.CLIENT_CONNECTED | Bluetooth.CLIENT_DISCONNECTED, handler=conn_cb)
    bluetooth.advertise(True)

    #Create service and characteristic
    srv1 = bluetooth.service(uuid='0000000000000000', isprimary=True)
    chr1 = srv1.characteristic(uuid='0000000000000002', properties=Bluetooth.PROP_INDICATE | Bluetooth.PROP_BROADCAST | Bluetooth.PROP_READ | Bluetooth.PROP_NOTIFY, value='InitialValue')

    #Create callback for read events on the characteristic
    def char1_cb(chr):
        events = chr.events()
        if events & Bluetooth.CHAR_READ_EVENT :
            print('Bluetooth.CHAR_READ_EVENT')

    chr1.callback(trigger=Bluetooth.CHAR_READ_EVENT, handler=char1_cb)

    #Update the characteristic value very few seconds
    #i=0
    while True:

        val = 'Value{}'.format(i)
        print('Setting value: {}'.format(val))
        chr1.value(val) #Set the characteristic value - should trigger notification is a client has registered for notifications
        time.sleep(3)
        i+=1

livius

@nagarjuna-reddy
you removed it before loop but better here if you remove it from loop
only connect before (you have only one disconnect)

st3ty

I have the exact same problem.

I am trying to connect two Wipys via bluetooth.
I get the connection on both sides.
But the programm frezzes with the line services = connection.services()

Is this a bug or is it a problem with my code?

from network import Bluetooth
import binascii

bluetooth = Bluetooth()

bluetooth.start_scan(-1)

adv = None

while True:


    adv = bluetooth.get_adv()

    if adv and bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL) == 'WiPy':

        if bluetooth.isscanning():
            bluetooth.stop_scan()

        try:

            connection = bluetooth.connect(adv.mac)

            while not connection.isconnected():
                pass

            if connection.isconnected():

                print("Connected to device with addr = {}".format( binascii.hexlify( adv.mac ) ) )
                print("and name = ", bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL))
                break

        except:
            # start scanning again
            bluetooth.start_scan(-1)
            continue

print('test1')
services = connection.services()
print('test2')

Nagarjuna Reddy

@livius
i cannot understand livius so edit my code and send to me please........

livius

i only mean that you must connect only once and for one connect you need one disconnect
below "fixed" code in this matter
i have also added small sleep time - look if it help somehow with your problem (i do not tested this self)

def ble_reciever(self):
		bluetooth = Bluetooth()
		print("Scanning 4509 client")
		bluetooth.start_scan(-1)

		while True:
			adv = bluetooth.get_adv()
			#if adv:
				#print("Found adv in 4509 client")
				# try to get the complete name
				#print(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL))

				# try to get the manufacturer data (Apple's iBeacon data is sent here)
				#print(binascii.hexlify(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_MANUFACTURER_DATA)))


			if adv and bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL) == 'LoPy':
				print("connecting rr Lopy in 4509 client")					
				conn = bluetooth.connect(adv.mac)					
				print("connected Lopy in 4509 client")  	
				
				services = conn.services()				 
				for service in services:
					time.sleep(0.050)
					print("start reading..")
					if type(service.uuid()) == bytes:
						print('Reading chars from service = {}'.format(service.uuid()))
					else:
						print('Reading chars from service = %x' % service.uuid())
					chars = service.characteristics()
					for char in chars:
						if (char.properties() & Bluetooth.PROP_READ):
							print('char {} value = {}'.format(char.uuid(), char.read()))
							
				conn.disconnect()
				print("Disconnected 4509 client")
				break
			else:
				time.sleep(0.050)

	def ble_transmitter(self):

		print('Advertising Bluetooth...')
		bluetooth = Bluetooth()
		bluetooth.set_advertisement(name='LoPy', service_uuid=b'1234567890abcdef')

		def conn_cb (bt_o):
			events = bt_o.events()
			if  events & Bluetooth.CLIENT_CONNECTED:
				print("Client connected")
			elif events & Bluetooth.CLIENT_DISCONNECTED:
				print("Client disconnected")

		bluetooth.callback(trigger=Bluetooth.CLIENT_CONNECTED | Bluetooth.CLIENT_DISCONNECTED, handler=conn_cb)
		bluetooth.advertise(True)

		#Create service and characteristic
		srv1 = bluetooth.service(uuid='0000000000000000', isprimary=True)
		chr1 = srv1.characteristic(uuid='0000000000000002', properties=Bluetooth.PROP_INDICATE | Bluetooth.PROP_BROADCAST | Bluetooth.PROP_READ | Bluetooth.PROP_NOTIFY, value='InitialValue')

		#Create callback for read events on the characteristic
		def char1_cb(chr):
			events = chr.events()
			if events & Bluetooth.CHAR_READ_EVENT :
				print('Bluetooth.CHAR_READ_EVENT')

		chr1.callback(trigger=Bluetooth.CHAR_READ_EVENT, handler=char1_cb)

		#Update the characteristic value very few seconds
		#i=0
		while True:
			val = 'Value{}'.format(i)
			print('Setting value: {}'.format(val))
			chr1.value(val) #Set the characteristic value - should trigger notification is a client has registered for notifications
			time.sleep(3)
			i+=1

Nagarjuna Reddy

@livius said in Bluetooth services is not started:

Bluetooth.CHAR_READ_EVENT

transmitter run in one LoPy and reciever LoPy is connected but not get any values from transmitter side i want to
bolded text

i=0
while True:
val = 'Value{}'.format(i)
print('Setting value: {}'.format(val))
chr1.value(val) #Set the characteristic value - should trigger notification is a client has registered for notifications
time.sleep(3)
i+=1
this is a transmitter side loop this loop values is getting to once connected reciever is recieved that for loop values but in their not iam getting so please solve my problem

Nagarjuna Reddy

@nagarjuna-reddy
livius you already edit my code but same problem i am getting what iam expected output is sending before message so please check and replay it arguently.

Nagarjuna Reddy

@livius

ivius
you already edit my code but same problem i am getting what iam expected output is sending before message so please check and replay it urgently.

Nagarjuna Reddy

@st3ty

hi i am also have a same problem if you success to execute please send your code to me.
Thank you

jmahesh

@nagarjuna-reddy said in Bluetooth services is not started:

conn.disconnect()

Hi,
put a sleep time before service loop, that will make the services to read. I tried and it is working.

time.sleep(1.0);
print('sleep resumed', conn.services())
services = conn.services()
print(services)
for service in conn.services():

st3ty

@jmahesh

Hi,

I tried it too and it's working.

Thank You!

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