Can I create a master and slave in one device?

[Peter Verheij]

I would like to create a unit which is intermitting in the master and in the slave role.It should be most of the time "advertising" and waiting for some master to connect to it i.e. slave role.But every now and then it should leave this role and become a master and try to connect to another slave. Can this be done in a single device? wil it need to swap softdevice S110 / S120 every time?

[Carles]

I can suggest another option:

You could create a custom (or even ANT) link between the temperature sensor and the stove controller. The nRF51 series of chips is capable of concurrently running 2 protocols (ANT and BLE) or sequentially running 2 protocols (custom/Gazell and BLE), and those protocols have full support for master/slave. Since the temperature controller does not need to connect directly to the phone, it doesn't need to use a standard protocol like BLE. That way you would only need 2 ICs instead of 3.

Regards,

Carles