Attempting to connect two WiPy 3.0 via Bluetooth

[Karin Layton]

I am setting up one client and one service WiPy. I cannot get them to connect.

Using code directly from the pycom documentation for the client:

from network import Bluetooth
import time
bt = Bluetooth()
bt.start_scan(-1)

while True:
  adv = bt.get_adv()
  if adv and bt.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL) == 'WiPySensor':
      try:
          conn = bt.connect(adv.mac)
          services = conn.services()
          for service in services:
              time.sleep(0.050)
              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()
          break
      except:
          print("Error while connecting or reading from the BLE device")
          break
  else:
      time.sleep(0.050)

and service:

from network import Bluetooth
bluetooth = Bluetooth()
bluetooth.set_advertisement(name='WiPySensor', service_uuid=b'1234567890123456')

def conn_cb (bt_o):
    events = bt_o.events()   # this method returns the flags and clears the internal registry
    if events & Bluetooth.CLIENT_CONNECTED:
        print("Client connected")
    elif events & Bluetooth.CLIENT_DISCONNECTED:
        print("Client disconnected")

def char1_cb_handler(chr, data):

    # The data is a tuple containing the triggering event and the value if the event is a WRITE event.
    # We recommend fetching the event and value from the input parameter, and not via characteristic.event() and characteristic.value()
    events, value = data
    if  events & Bluetooth.CHAR_WRITE_EVENT:
        print("Write request with value = {}".format(value))
    else:
        print('Read request on char 1')

bluetooth = Bluetooth()
bluetooth.set_advertisement(name='WiPySensor', service_uuid=b'1234567890123456')
bluetooth.callback(trigger=Bluetooth.CLIENT_CONNECTED | Bluetooth.CLIENT_DISCONNECTED, handler=conn_cb)
bluetooth.advertise(True)

srv1 = bluetooth.service(uuid=b'1234567890123456', isprimary=True)
chr1 = srv1.characteristic(uuid=b'ab34567890123456', value=5)
char1_cb = chr1.callback(trigger=Bluetooth.CHAR_WRITE_EVENT | Bluetooth.CHAR_READ_EVENT, handler=char1_cb_handler)

Running both, I get the error from the client:
OSError: operation already in progress

Not sure how to proceed from here.