Invalid argument when sending Bluetooth packets through srbt()

Hi, I'm trying to send a Bluetooth packet to a known mac address, I tried the function srbt(), as the code below:

pkts=HCI_Hdr(type=2)/HCI_ACL_Hdr(handle=0x040, PB=0, BC=0)/L2CAP_Hdr(cid=0x0004)/
         ATT_Hdr(opcode=0x52)/ATT_Write_Command(gatt_handle=0x000d,data=bytes(data.buf))
srbt('e8:32:2a:d2:a8:79', pkts, inter=0.1)

But it always has this bug:

Traceback (most recent call last):
  File "get.py", line 48, in <module>
    srbt('e8:32:2a:d2:a8:79', pkts, inter=0.1)
  File "/usr/local/lib/python3.7/dist-packages/scapy/layers/bluetooth.py", line 1580, in srbt
    s = conf.BTsocket(bt_address=bt_address)
  File "/usr/local/lib/python3.7/dist-packages/scapy/layers/bluetooth.py", line 1451, in __init__
    s.connect((bt_address, port))
OSError: [Errno 22] Invalid argument

How can I solve this problem? Or is there another way to send Bluetooth packets to a known mac address?
Thank you very much!

Start in scapy/layers/bluetooth.py at srbt() around line 1580 and the BTsocket connection around line 1451. Reproduce the reported call and inspect the arguments passed to s.connect(); determine the cause of the Invalid argument error and verify a supported way to send packets to the given Bluetooth address.