Bluetooth (BLE) gap_advertise fails on multiple UUID's...

[Enasynco]

Hello,
I'm currently running MicroPython v1.19.1-358 (ESP32 GENERIC_OTA 4MB) and get the following error when I add multiple service UUID's.

from ble_advertising import advertising_payload as adpl
import ubluetooth
ble = ubluetooth.BLE()
ble.active(True)
p1 = adpl(name='Test_A',services=[ubluetooth.UUID(0x181A)],)
p2 = adpl(name='Test_B',services=[ubluetooth.UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E")],)
p3 = adpl(name='Test_AC',services=[ubluetooth.UUID(0x181A), ubluetooth.UUID(0x1801)],)
p4 = adpl(name='Test_AB',services=[ubluetooth.UUID(0x181A), ubluetooth.UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E")],)

ble.gap_advertise(30000, adv_data=p1)  # Works

ble.gap_advertise(30000, adv_data=p2)  # Works

ble.gap_advertise(30000, adv_data=p3)  # Works

ble.gap_advertise(30000, adv_data=p4)  # FAILS!!

Last line results in:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: -18

I suspect the advertising packet is overflowing, yet don't believe this is correct. What am I missing??

[jimmo]

I suspect the advertising packet is overflowing, yet don't believe this is correct. What am I missing??

This is exactly what's happening.

>>> print(len(p1), len(p2), len(p3), len(p4))
15 29 20 34

BLE advertising payloads max length is 31.

You should either put some of your data into the scan response instead.

Or use aioble which does this automatically.

[amplatzer]

May I know are you trying to have multiple advertisements?