is s110 device can connect to multiple centrals at a time..?

[FormerMember]

whether one s110 device can connect to multiple s120 devices simultaneously...?

if not what is the special feature mentioned in Bluetooth 4.1 specification..? is it limitation of nordic...? or Bluetooth SIG spec is not supporting..?

[Ulrich Myhre]

The s110 can only connect to a single central, but is able to do non-connectable advertising while in that connection. This limitation used to be a topology limitation by the 4.0 spec, which was lifted with 4.1 and the introduction of scatternets. All current Nordic SoftDevices today are still limited to at most 1 peripheral, but if you know of any use-cases that require multiple peripheral links then we would like to hear about it.

Traditionally the peripheral role is used for actuators/sensors and more light-weight battery-driven devices, while the observers or centrals had lighter power requirements and could pick and choose which sensor(s) to connect to and control.

The new, production-ready s130 1.0.0 is able to hold 3 central->peripheral links and 1 peripheral->central link simultaneously, which allows scatternets to be built.

[Stefan Birnir Sverrisson]

A alternative method of switching between two centrals is described here