I have 50 temperature sensors, what I need is that all the 50 sensors sends there data to one Central unit. This unit will put all the sensor data in a MYSQL database.

When I setup peer to peer communication (what have the fastest startup from a cold start, I turn down the power of the sensors) all data from all the sensors will go to each other.

I like to have that all the sensors send there data only to the host not to the other ones.