Yet another hardware update

We have now added a UART to USB interface to the controller board using a chip from FTDI. This interface has two functions –

  • Provide serial connectivity using a USB cable (USB Mini-B plug)
  • Provide power to a sensor node

The UART to USB interface is more suitable for gateway nodes which need to be connected to a PC or an SBC such as the Raspberry Pi. This interface is not required on battery powered RFDs (reduced function devices). We will give you the option to include/exclude this interface on any nodes you purchase.  We are using a FT234XD UART/USB bridge chip from FTDI.  We are using the 3.3 volt output from this chip to power the sensor node. Note that there is a separate SPY-BY-WIRE for programming and debugging the microcontroller. The SPY-BY-WIRE interface also powers the sensor node during programming/debugging. You can use the SPY-BY-WIRE interface as well as the UART/USB interface at the same time. When both interfaces are in use, the SPY-BY-WIRE powers the board (in addition to programming/debugging) and the  UART/USB interface provides only the serial connectivity.

We also added a tiny reset button to the controller board. Press this button to (hardware) reset the MSP430.

Now some pics –

usb_uart

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node_with_usb_cable

Posted on February 7, 2014, in Uncategorized. Bookmark the permalink. Leave a comment.

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