Running multiple Server instances or Just add more characteristics

RE: Running multiple Server instances or Just add more characteristics

Arepa — Wed, 21 Nov 2018 12:56:07 GMT

Yes, it is a central

then path I should have to follow is.. replicate the advertising packet that the central is waiting for. And add the services with their UUIDs on my peripheral wheres the centra will write the sensors data.

Ed Thanks for clarifying it solve all my questions regading this topic

Cheers

RE: Running multiple Server instances or Just add more characteristics

Edvin — Wed, 21 Nov 2018 09:35:01 GMT

Hello,

I understand.

As you may know, it is the peripheral that advertises, and the central that scans. It is also the central that decides whether or not to connect to a specific peripheral. It may be a bit difficult to figure out what the central will connect to, as it doesn't do any advertisements. Are you sure that your new sensor is a central, and not a peripheral? Does it advertise BLE packets?

If it is actually a central, you need to figure out what the central is scanning for. It could be a particular UUID, a specific advertising name, or something custom. It is up to the central really, to figure out whether or not to connect to a peripheral based on it's advertising packet, and there are several ways of designing an advertising packet.

BR,

Edvin.

RE: Running multiple Server instances or Just add more characteristics

Arepa — Tue, 20 Nov 2018 18:41:23 GMT

Hi Ed, my main device is a peripheral and I have multiple central devices filtering the peripheral of interest (my main peripheral) then they are able to connect send data from sensors and go to sleep again. but now enters in the game a new kind central devices (which were developed by a 3rd party using different UUIDs and attribute table) and I need to connect them to my current peripheral and receive their sensors data, that is why I was asking for multiple GATT server instances, but it seems like is not possible, from my understanding my path to take is adding new characteristics to my peripheral to be able to connect to the new central devices, is it right?

RE: Running multiple Server instances or Just add more characteristics

Edvin — Tue, 20 Nov 2018 14:26:49 GMT

1: No. Only one instance.

2: I am not sure if I understand.

Is your device a peripheral or a central?

What you describe:

You have a central scanning advertising packets, and connecting if it finds a peripheral of interrest, right?

Then what do you want to do after connecting?

BR,

Edvin