Max Slaves in star network with nrf51822?

[ethan schneider]

Hi,

I am trying to create a star network with 12-16 slaves and one master.

The master would be a nrf51822 and the slaves nRF8001/2.

The slaves would not transmit any data besides "I'm here".

Is this possible with these chips?

[David Edwin]

The nRF8001 should be in the ACI Connect/ACI Broadcast state and ideally you should use the ACI Broadcast state to minimize power consumption. In this state the nRF51 with the S120 should be able to scan for the nRF8001s

[ethan schneider]

Thanks for the advice!

Any idea what current is drawn when the nRF8001 is in this state?

[David Edwin]

You can use the nRFgo studio power calculator to calcluate the power requirements. nRFgo Studio -> nRF8001 Configuration -> Current consumption. You can also use a transistor to cut off power completely to the nRF8001 when it is not in use so the sleep current can effectively be zero.