I wonder how to set the transmit power of RFM69HW radios as I couldn't find a hint in the documentation.
Also the newly implemented RadioHead framework supports reporting the RSSI of the radio itself. Is there a way to access it? It would be nice to know how far radios be can placed apart before signal strength is too weak.
Also the tx power could be reduced to save some energy on battery powered nodes, if you now how good the incoming signal is.