Setting MFG data in for advertising

[Intellithings]

I'm unable to set the manufacturer id of the manufacturer data in advertisingClass.js file.

I added:
this._iface1.addProperty('ManufacturerData', { type: { type: '{q(y)}' }, getter: (callback) => { callback(null, { 0xffff : [0x01, 0x02, 0x03, 0x04, 0x05] } ); } });

using nRFConnect, I can see the advertising as should, but the manufacturer id is incorrect.
I get a different id every time I run the app.

I also tried to play with the type with many other combinations ({qay} {say}, {sav} etc.)
I'm using BlueZ 5.50 on Raspberry PI Zero W

[JohnRucker]

I'm curious, where did you get the type: '{q(y)}' description? I haven't used this module to change the manufacture data so not sure if that is the correct description to use. I would focus my efforts around that area. Also the data has to be in the correct format matching the description. The format for manufactureData is defined in the advertising-api.txt document. use dbusmon to see what this module is responding with when bluez requests information about the advertising packet.

[Intellithings]

look at the table below:
https://github.com/dbusjs/node-dbus-next

I would go for {qay}
A dictionary from uint16 to array of bytes

[Intellithings]

the doc says:

dict ManufacturerData
Manufactuer Data fields to include in the Advertising Data.
Keys are the Manufacturer ID to associate with the data.

(A dictionary from uint16 to array of bytes)
The command is not failing and does not return error. I can see the mfg data using nRFConnect.
I can even add 2 mfg records.
The only thing that is incorrect is the mfg-id.

Thanks!

[JohnRucker]

Even though you are not getting an error I would still verify bluez is getting what it expects from the advertisingClass.js for mfg-id over dbus. I have seen bluez make a call over dbus and if the format is off at all it will simply reject the call and keep going without the data. I wonder if another approach would be to set the ID some how in the bluez configuration for your Raspberry Pi.

[Intellithings]

Okay, I've logged the output from dbus-monitor and compared the outputs between using the code to start advertising and using bluetoothctl

ManufacturerData is a dictionary where the key is the mfg-id (uint16) and the value is the array of bytes.
When using code we get:
dict entry( string "ManufacturerData" variant array [ dict entry( string "65535" variant array of bytes [ 12 34 ] ) ] )

When using bluetoothctl we get:
dict entry( string "ManufacturerData" variant array [ dict entry( uint16 65535 variant array of bytes [ 12 34 ] ) ] )

See how the code incorrectly parsed the mfg-id to string instead of uint16.
in JavaScript I don't think you can have a numeric key of a dictionary.
Any idea how to build the dictionary in a way that the key would remain uint16?
callback(null, { 0xffff : [0x12, 0x34 ] } );
The code above is translated as:
{ '65535': [ 18, 52 ] }

[JohnRucker]

I have a lot going on right now and not able to spend much time on this. You may want to look at the other classes I have created (I would start with the characteristicClass.js) and see if there is an example of using an array of bytes along with a definition. If not the next step is to try different combinations until you find one that works (trial and error). That is how I figured out all the definitions.

If you get it working please share your results. I would love to add this feature!