PlugMeter

The FireFly PlugMeter is a wireless plug-load meter and switch with the following characteristics:

Processor/Radio
  • ATmega128rfa1
  • 8bit, 16MHz
  • 16KB RAM, 128KB flash
  • 802.15.4 integrated radio
Power Measurement
  • Dual Channel Current Sensing
    • Low-Gain (0-15 Amp at 10bit)
    • High-Gain Meter (0-1 Amp at 10bit)
  • True Power integrating voltage and current at 2kHz
  • RMS voltage, RMS current, True Power, Apparent Power, Power Factor, Energy Accumulator
Actuation
  • Mechanical Relay 15A limit
  • 15A fuse
Networking
  • PCF TDMA mesh protocol
    • Configurable slot length (10ms default)
    • Each hop adds additional slot length to TDMA frame
    • Example configuration: 3 hops, 1000 nodes corresponds to a 3 second update rate

ff-plug-top.jpg (614 KB) Anthony Rowe, 11/11/2013 04:52 am

ff-plug-bottom.jpg (465 KB) Anthony Rowe, 11/11/2013 04:52 am

plug-front.jpg (484 KB) Anthony Rowe, 11/11/2013 04:52 am