I am working with a university project where need to connect up to 20 wireless sensors together with 1 master, which will be communicating with either a computer or smartphone. So obviously the master has to be a BLE/WIFI device. But since i want to create a flexible system it could be interesting to make the sensor devices universal, so any unit could become a master or a slave.
I have been looking at nRF51822, but i am not sure if its capable of both being in standard 2.4GHz RF and BLE mode at the same time?
My idea is to connect all 15-30 sensors to the master by traditional RF, and make the master send this data to my PC/smart-device.
All suggestions are welcome, thanks in advance.