Scan crashes if a device around is not broadcasting its name properly

[Betree]

ERROR:magicblue.magicblueshell:Unexpected error with command "ls": 'NoneType' object has no attribute 'split'

Probably comes from this line :
dev_name = dev.getValueText(9).split('\x00')[0]

[Betree]

It should be fixed by 32fc061

@IzzyWizzy666
Not merged with master, please install from develop branch :

pip3 install --upgrade git+https://github.com/Betree/pyMagicBlue.git@develop 

Also I can't guarantee your bulb will work as this could be a symptom for an incompatible bulb (if you have a new version for example)

[IzzyWizzy666]

Hi, OK, thanks I'll give it a try :), my bulb is version 8 according to the app.

[IzzyWizzy666]

Something is a bit strange, I can connect sometime but when I try to do set_color red it appears to do it without any error message but the bulb stays white. Also here is the output from the ls command....... ls Listing Bluetooth LE devices in range for 5 minutes.Press CTRL+C to stop searching. ID    Name                           Mac address --    ----                           ----------- 1     LEDBLE-5D6EA3E8                c1:40:5d:6e:a3:e8 2     LEDBLE-09E6DE78                f2:f1:09:e6:de:78 <--------------- 3     Flower mate                    c4:7c:8d:61:ac:f7 4     Flower mate                    c4:7c:8d:61:a8:46 5     NO_NAME                        c4:7c:8d:61:81:35 6     NO_NAME                        c3:50:98:31:64:f2 7     NO_NAME                        f9:b7:24:6c:64:28 8     NO_NAME                        c4:7c:8d:61:7c:2b ID    Name                           Mac address --    ----                           ----------- 1     NO_NAME                        f9:b7:24:6c:64:28 2     NO_NAME                        f2:f1:09:e6:de:78  <------------------ 3     NO_NAME                        c3:50:98:31:64:f2 4     LEDBLE-5D6EA3E8                c1:40:5d:6e:a3:e8 5     NO_NAME                        f9:72:f8:1e:66:f4 6     NO_NAME                        c4:7c:8d:61:7c:2b 7     Flower mate                    c4:7c:8d:61:a8:46 8     NO_NAME                        c4:7c:8d:61:81:35 9     Flower mate                    c4:7c:8d:61:ac:f7 Another couple of scans and an error message..... Magic Blue interactive shell v0.2.3Type "help" for a list of available commands

ls

Listing Bluetooth LE devices in range for 5 minutes.Press CTRL+C to stop searching. ID    Name                           Mac address --    ----                           ----------- 1     LEDBLE-5D6EA3E8                c1:40:5d:6e:a3:e8 2     LEDBLE-09E6DE78                f2:f1:09:e6:de:78 3     Flower mate                    c4:7c:8d:61:81:35 4     NO_NAME                        f9:72:f8:1e:66:f4 5     Flower mate                    c4:7c:8d:61:ac:f7 6     NO_NAME                        f9:b7:24:6c:64:28 7     Flower mate                    c4:7c:8d:61:a8:46 8     NO_NAME                        c3:50:98:31:64:f2 9     NO_NAME                        c4:7c:8d:61:7c:2b^C

ls

Listing Bluetooth LE devices in range for 5 minutes.Press CTRL+C to stop searching. ID    Name                           Mac address--    ----                           ----------- 1     LEDBLE-09E6DE78                f2:f1:09:e6:de:78 2     NO_NAME                        c1:40:5d:6e:a3:e8 3     Flower mate                    c4:7c:8d:61:81:35 4     Flower mate                    c4:7c:8d:61:a8:46 5     NO_NAME                        c3:50:98:31:64:f2 6     Flower mate                    c4:7c:8d:61:ac:f7 7     NO_NAME                        f9:72:f8:1e:66:f4 8     NO_NAME                        f9:b7:24:6c:64:28 9     NO_NAME                        c4:7c:8d:61:7c:2b^C

ls

Listing Bluetooth LE devices in range for 5 minutes.Press CTRL+C to stop searching. ID    Name                           Mac address --    ----                           ----------- ERROR:magicblue.magicblueshell:Unexpected error with command "ls": Failed to execute mgmt cmd 'scan'

[Betree]

Ok so first problem is fixed as some devices around you aren't broadcasting their names properly.

The second problem that you have is a bit more complicate to diagnose, have you tried following this : How-to-use-manually-with-Gatttool ? It could really help to see if it works with it.

You can also try using bluetoothctl command to send request manually.

[IzzyWizzy666]

Hi, OK, I still can't communicate with my lights, I tried with the GATTool and although it can connect to the bulb, nothing else was possible, turning off/on, changing color etc. If you can explain how to use bluetoothctl to communicate with the bulb I'll try that, I can trust it and connect to it, but that's as far as I've got. 

[Betree]

There's still two things we can try :

• Connect with gattool using a public address type instead of random (replace MAC_ADDRESS by your bulb mac address like you did in How-to-use-manually-with-Gatttool) :
  sudo gatttool -t public -b MAC_ADDRESS -I

• (And / Or) Try a different handle to change the color (0x0b instead of the usual 0x0c):
  char-write-req 0x000b 56FFFFFF00f0aa to set white
  char-write-req 0x000b 56FF000000f0aa to set red

Most plausible cause is difference in bulbs protocol. I've never tried v8 (yours) nor ever heard of someone who did but v9 needed a special patch that may be required for v8 as well (see #7).

If that works for you the update could be pretty easy 🤞

[IzzyWizzy666]

Hi Benjamin, This is the results.... pi@raspberrypi3:~ $ sudo gatttool -t public -b F2:F1:09:E6:DE:78 -I [F2:F1:09:E6:DE:78][LE]> connectAttempting to connect to F2:F1:09:E6:DE:78 Error: connect error: Connection refused (111) [F2:F1:09:E6:DE:78][LE]> connectAttempting to connect to F2:F1:09:E6:DE:78 [F2:F1:09:E6:DE:78][LE]> [F2:F1:09:E6:DE:78][LE]> quitpi@raspberrypi3:~ $ sudo gatttool -t random -b F2:F1:09:E6:DE:78 -I [F2:F1:09:E6:DE:78][LE]> connectAttempting to connect to F2:F1:09:E6:DE:78 Connection successful [F2:F1:09:E6:DE:78][LE]> char-write-req 0x000b 56FFFFFF00f0aa [F2:F1:09:E6:DE:78][LE]> char-write-req 0x000b 56FFFFFF00f0aa [F2:F1:09:E6:DE:78][LE]> char-write-req 0x000b 56FF000000f0aa [F2:F1:09:E6:DE:78][LE]> The char-writes had no effect :( Cheers,Keith

[Betree]

Thank you very much for trying all of this 👍

Unfortunately I think your bulb version (v8) is currently incompatible. I created an issue specific to discussions about this version #13 and updated the README to state of this incompatibility.

Now if you need this to work you'll have to dig by yourself, I can help you with the basics but not having this bulb I won't be able to study its protocol.
A start would be to get a sniffer, Wireshark on Linux is doing a great job but you may be able to do it by directly logging bluetooth from your Android. You'll then need to see which handle is called and with which values when you change a color.
Finally you can try again using manually with Gatttool with the new values you've got and if it works then fixing magicblue will be as easy as 1-2-3 😉