Hi Christian, On Mon, Mar 17, 2014 at 2:06 PM, Christian Bianchini <christian.bianchini@xxxxxxxxxxxxx> wrote: > I can try with your idea but if I continue to type commands to read > stuff, try to write, etc... the device doesn't disconnect. I guess > it's a timeout after I dont get or send any data, probably a > power-safe-mode. > > i have bluez 4.101 : > ii bluez 4.101-0ubuntu8b1 > amd64 Bluetooth tools and daemons > > > What I dont get is that I can't write any parameters: > char-write-req a 0100 > [CON][DC:7A:F8:10:AF:A5][LE]> Characteristic Write Request failed: > Attribute can't be written This error actually means "Write not permitted". One first error is that you are trying to write to the characteristic declaration attribute, which is always read-only. To enable notification, you should write to the Client Characteristic Configuration (CCC) descriptor, which for the first characteristic is probably 0x000c (you can confirm by running "char-desc 0x000c 0x000c", if it appears one attribute with UUID 0x2902, it is a CCC). Can you try this instead: char-write-req 0x000c 0100 By the way, I strongly suggest you read a bit more on GATT (there are some good resources on bluetooth.org), so you understand better what are notifications, descriptors, characteristics, services etc. PS: When replying to e-mails on the mailing list, be sure to not top-post (i.e. write your reply before the original message) and remember to trim the original message to only show the relevant part of the original message (like I did above), otherwise it is difficult to follow discussion. Best Regards, -- Anderson Lizardo http://www.indt.org/?lang=en INdT - Manaus - Brazil -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
