The Amp Hour

An Interview with Felix Rusu

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  • Felix has been running LowPowerLab since 2011 after a career in software engineering and attending school at ASU.
  • While evaluating RF modules, he started with RFM12B, now obsolete
  • RFM69
    • Chip from Semtech (but custom packaged for HopeRF)
    • Module by HopeRF
    • Also can use RFM95/96 with LPL devices for LoRa projects
    • Range for RFM69 is a couple hundred meters to a couple kilometers
    • Battery life is about 1-2 years without lots of tweaking to the code
    • Moteinos are the main product, they can be customized with modules and flash.
    • These are based off the Arduino Uno and use an Microchip (Atmel) 328P for the processing. A newer version uses the SAMD21.
    • The power can get down below 10 uA while sleeping, including radios. During transmit, the power is in the 10s of milliamps.
    • There is an RFM69 library that gets you started quickly using the RF side of things
    • The community has many resources including tutorials and a forum.
    • Felix recommends starting with the Mailbox Project which uses the MotionMote kit.
      • ...more
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      The Amp HourBy The Amp Hour (Chris Gammell and David L Jones)
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