Possibly the wrong advertisement data is being sent

[zdennis]

The advertisement data I'm seeing with TI RF Packet Sniffer is not what I would expect. Here's a simple peripheral showcasing the issue: https://gist.github.com/zdennis/8447896

When running the advertisement data is: 02 01 0A 02 0A 08 0C 09 43 53 52 38 35 31 30 20 41 31 30

However I'd expect the advertisement data to be: 02 01 05 11 06 d7 4f 4a f1 9b 70 15 91 4f 4c 1a 99 93 38 61 dd

In fact, this is what hci-ble.js thinks it's advertising in HciBle.prototype.startAdvertising but it's not what's being advertised. This is with both bleno 0.1.1 and also bleno @ ee06f6c .

This is using bluez 5.12 (I am currently building bluez 5.13 to try there as well).

Any thoughts?

[sandeepmistry]

Might be an issue in hci-ble.c the read is not buffered as well as it could be. You can try adding a printf there, then run with debug: sudo DEBUG=hci-ble node <file>.js to make sure they match up.

Also, I'm running 4.101 at home, but not much of the BlueZ user space lib is used.

[zdennis]

Thanks for the debugging info @sandeepmistry . Everything seems fine all the way til https://github.com/sandeepmistry/bleno/blob/master/src/hci-ble.c#L27 . After that I'm not sure how to check the data as part of the hci_request.

I'm now on bluez 5.13 and it's the same issue. I will look some more tomorrow. I will try to downgrade to 4.101 as well and try that.

[sandeepmistry]

Hmm, that would mean the HCI command is failing or something. Did you check what status was?

What Linux distro, etc. are you running?

[dragom]

I had buffering problems on arduino Yun and bleno. stdbuf command from javascript spawn did not help.
So I add setvbuf(stdout, NULL, _IONBF, 0); on all i/o streams.
http://stackoverflow.com/questions/7876660/how-to-turn-off-buffering-of-stdout-in-c

[zdennis]

@sandeepmistry I can't recreate this issue now. I'm guessing it was likely something on my end. I've got my peripheral working great on OSX and Linux now.

Closing this issue.

[sandeepmistry]

Thanks @zdennis.

@dragom can you please submit a pull request for the setvbuf change? Also, it's cool that you got in running on the Yun! What's the best way to contact you to learn more about bleno + the Yun?

[dragom]

Here are notes to make bleno work on linino:
dragom/linino#1