Bluetooth Mesh - number of devices

[Marcelo]

What is the limit of devices on Bluetooth Mesh using nRF52932?

[leonwj]

Hello Marcelo,

Bluetooth Mesh uses the term 'Node' to imply a specific device on its network and each Node can have 1 or more 'elements' that can be individually addressed via their unicast address...

So for example, if you think of a potentially mesh enabled power-strip-extension-block with sockets to plug in 6 appliances;

then based upon how the implemented mesh app exposed its model, the Bluetooth Mesh could assign the Primary element/socket a unicast address (say for example: 0x1000) and assign follow-on unicast addresses to the next 5 elements/sockets (e.g. 0x1001-0x1005)

Within a single Bluetooth Mesh network, a maximum of 32,767 of these unicast addresses can be assigned (0x0001 - 0x7FFF). So theoretically, a mesh network could accommodate the number of devices whose total element count doesn't exceed 32,767. However, the practical limit is expected to likely be much lower than that.

Please refer to the section 3.4.2 of the Bluetooth Mesh Profile specification for additional info.

Regards,

[Bjørn Kvaale]

I agree with leonwj. As this link states: "Bluetooth Mesh supports up to 32767 devices in a network, with a maximum network diameter of 126 hops."