bluepy.btle.BTLEManagementError: Failed to execute management command 'le on' (code: 17, error: Invalid Index)

[Ajith61]

bluepy.btle.BTLEManagementError: Failed to execute management command 'le on' (code: 17, error: Invalid Index)

[maciej-napora]

Does this help? #313

[myfingerhurt]

@maciej-napora
I have the same issue, with sudo doesn't work either.

RPI4B Ubuntu 20.04 LTS

python3
Python 3.8.10 (default, Mar 15 2022, 12:22:08)
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> import bluepy
>>> scanner = bluepy.btle.Scanner(0)
>>> devices = scanner.scan(5)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/dist-packages/bluepy/btle.py", line 852, in scan
    self.start(passive=passive)
  File "/usr/local/lib/python3.8/dist-packages/bluepy/btle.py", line 790, in start
    self._mgmtCmd("le on")
  File "/usr/local/lib/python3.8/dist-packages/bluepy/btle.py", line 312, in _mgmtCmd
    raise BTLEManagementError("Failed to execute management command '%s'" % (cmd), rsp)
bluepy.btle.BTLEManagementError: Failed to execute management command 'le on' (code: 17, error: Invalid Index)
>>>  

Solution

I have solved this problem on RPI4B Ubuntu 20.04 LTS 5.4.0-1066-raspi.

• Step 1, found a solution in here, but didn't work at first

sudo apt-get purge pi-bluetooth
sudo apt-get purge bluez
sudo apt-get purge bluez-firmware

# After that install the pi-bluetooth
sudo apt-get install pi-bluetooth

After done the above, ran into this bug ,systemctl status hciuart.service couldn't start due to this error /90-pi-bluetooth.rules:14 Invalid value, they said you need ran this sudo apt install linux-modules-extra-raspi, but this didn't work on 20.04 LTS, so I did apt update && apt upgrade -y reboot the system apt autoremove.

• Step 2, hcitool dev got positive feedback

$ hcitool dev
Devices:
        hci0    DC:A6:32:6F:1B:04

extra tests, all good

$ hciconfig -a
hci0:   Type: Primary  Bus: UART
        BD Address: xx:A6:xx:6F:xx:04  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING
        RX bytes:13399 acl:0 sco:0 events:583 errors:0
        TX bytes:3515 acl:0 sco:0 commands:208 errors:0
        Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH SNIFF
        Link mode: SLAVE ACCEPT
        Name: 'RPI4B4G'
        Class: 0x000000
        Service Classes: Unspecified
        Device Class: Miscellaneous,
        HCI Version: 5.0 (0x9)  Revision: 0x156
        LMP Version: 5.0 (0x9)  Subversion: 0x6119
        Manufacturer: Cypress Semiconductor Corporation (305)

$ bluetoothctl
Agent registered
[CHG] Controller XX:A6:XX:6F:1B:XX Pairable: yes
[bluetooth]# scan on
Discovery started
[CHG] Controller XX:A6:XX:6F:1B:XX Discovering: yes
[NEW] Device XX:7D:04:XX:97:XX XX-7D-04-XX-97-XX
[NEW] Device XX:5C:74:XX:AA:3F XX-5C-74-XX-AA-XX
[bluetooth]#

• Step 3, python tests, all good

$ python3
Python 3.8.10 (default, Jun 22 2022, 20:18:18)
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import bluepy
>>> scanner = bluepy.btle.Scanner(0)
>>> devices = scanner.scan(5)
>>> for device in devices:
...   print('address : %s' % device.addr)
...
address : XX:f2:XX:0b:dc:XX
address : XX:92:XX:1e:09:XX
address : XX:83:XX:59:52:XX