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Building a remote sensor network with Nanode

Nanode is a modified Arduino board that comes with standard network interface and RFM12B radio module. This makes Arduino pretty powerful and portable. Wickeddevice have started a series of tutorial posts on how to build a remote sensor gateway that would collect data from multiple Nanodes and publish it to internet of things web application. Nanode gateway allows not only to view sensor data but also activate devices remotely. For internet of things connectivity they have chosen xively which allows free basic account to get things working. Continue reading

Ti launchpad runs a spectrum analyzer

This is great project for you if you make RF related projects. Working with signals is much more easier when you see them – especially if these are high freq. When building RF embedded applications you usually use standard modules that have standard frequencies like 433MHz, 868MHz and so on. So why not to use one of these modules to analyze spectrum of close frequencies. It can be done by using one of cheap RFM12B modules which can be easily interfaced to MSP430 MCU via SPI interface. Module frequency can be configured in steps depending on bandwidth chosen. Currently spectrum analyzer is set to read 916MHz bandwidth with sweep of 241 120kHz steps. And this is right all that TI Launchpad USART 9600bps bottleneck allows. USART sends sends spectrum data to Perl visualization script where graphs are nicely seen along some effects like Peak Hold or Zooming. You will find there a detailed instructions on how to set up such spectrum analyzer. An yes – this is done under Linux. Continue reading