Hardware update – stacking boards

WiSense hardware architecture supports stacking. A typical stack will have these boards –

  • A single micro-controller board (MSP430G2955 or MSP430G2553)
  • A single radio board (Chip antenna, Whip antenna or PCB antenna)
  • One or more sensor boards
  • One battery board with rechargeable coin/button cell and associated with DC-DC converter (if required) and solar cell connector.  The other option is a simple 3 Volts Lithium coin cell.

We recently built and tested our first stacked node with two boards. One is a controller board with the MSP430G2955. The other is a radio board with a chip antenna. The MSP430 talks to the cc2520 transceiver over the SPI bus and a few GPIOs.  This SPI bus is available to all boards in the stack (not just the radio board) . For example, we can plug in a sensor board equipped with the  “MPL115A1” barometer sensor. This sensor has an SPI interface.

All “stackable” boards have two 2×10 self nesting connectors. The boards can be plugged in any order (radio board on top of the controller board or vice versa).

 

Radio board with chip antenna

rf_board_to

 

 

 

 

 

 

 

 

 

Controller board (top side)

controller_top

 

 

 

 

 

 

 

 

 

 

Controller board (bottom side)

controller_bottom

 

 

 

 

 

 

 

 

 

 

Stacked node (radio board plugged into controller board)

stackable_boards

Posted on December 22, 2013, in Uncategorized. Bookmark the permalink. Leave a comment.

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