Wireless System Development

Over the next few weeks, we are going to develop a wireless system to capture and log data from remotes sensors. The system will have a master controller to manage the communication between all the devices (nodes) in the system.

Depicted above is the overall architecture and the communication mode.
The PC will be communicating with the master controller (mPIC) via the USB interface.
The master controller (mPIC) will be talking to the wireless module (RFM) via SPI interface.
The wireless module (RFM) will communicate wireless to another RFM using radio waves at 430MHz.
The slave (sPIC) will be talking to the RFM via SPI to receive commands and submit data.
The slave (sPIC) will be connected to various analog and digital sensors as required.

System general info.
The slave will be operating using batteries thus will be in sleep mode until communication/data capture is required.
The master controller will operate autonomously independent of the PC. The PC connection is required only for offloading of capture data for further storage or analysis as well as for initial setup and configuration of the system.