QUERY · ISSUE

gap_advertise connectable=False doesn't work

openby devkralopened 2025-11-26updated 2026-03-24

port-esp32needs-info

Port, board and/or hardware

esp32-c3 port

MicroPython version

1.26.1

Reproduction

Setup:
https://github.com/rroemhild/ubeacon/blob/main/examples/eddystone_uid.py

Expected behaviour

not visible/advertised as connectable

Observed behaviour

Advertised as connectable. Tested with a smartphone and a laptop.

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree

CANDIDATE · ISSUE

ESP32 BLE gap_advertise() param cause exception

closedby walklinewangopened 2020-03-04updated 2020-03-06

port-esp32extmod

According to BLE.gap_advertise(), I'm setting up the param 'connectable' to False, then it will cause exception:

import ubluetooth as bt
from ble_advertising import beacon_advertising_payload

class Beacon(object):
    def __init__(self, ble):
        self.__ble = ble

        self.__ble.active(False)
        print("activating ble...")
        self.__ble.active(True)
        print("ble activated")

        self.__adv_payload = beacon_advertising_payload("https://walkline.wang")

    def advertise(self, interval_us=50000):
        print("advertising...")
        self.__ble.gap_advertise(interval_us, adv_data=self.__adv_payload, connectable=False)


def main():
    ble = bt.BLE()
    beacon = Beacon(ble)

    beacon.advertise()

activating ble...
I (21110) BTDM_INIT: BT controller compile version [5aed448]
I (42562) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (42662) phy: phy_version: 4102, 2fa7a43, Jul 15 2019, 13:06:06, 0, 0
GAP procedure initiated: stop advertising.
ble activated
advertising...
GAP procedure initiated: advertise; disc_mode=2 adv_channel_map=7 own_addr_type=0 adv_filter_policy=0 adv_itvl_min=80 adv_itvl_max=80
GAP procedure initiated: advertise; disc_mode=2 adv_channel_map=7 own_addr_type=2 adv_filter_policy=0 adv_itvl_min=80 adv_itvl_max=80
Traceback (most recent call last):
  File "<stdin>", line 64, in <module>
  File "<stdin>", line 60, in main
  File "<stdin>", line 53, in advertise
OSError: [Errno 5] EIO

According to the system information prompt, it looks like the advertise function was executed twice automatically, but why?