1-July-2020

Attendee

  • @Austin Patel

  • @Jackson Paddock

  • @Mališa Vučinić

  • @Timothy Claeys

  • @Thomas Watteyne

  • @Tengfei Chang

  • @Kristofer PISTER

  • @David Burnett

Minutes

  • @Jackson Paddock

    • trying to setup simulation

  • @Austin Patel

    • still working on the paper

    • presenting results at 35-40 C communicating

    • was hoping to piece the different calibration method together, including 2M

    • @Kristofer PISTER solar voltage and current is changing with temperature as well, conceivable that that impacts

    • @Kristofer PISTER data at other temperature range? No, just 35-40 C.

    • @Kristofer PISTER probably room temperature data is also important.

    • @Kristofer PISTER interesting to see why you have such as small range; big difference is running from solar.

    • @Austin Patel : smaller 5C range appeared when using solar

    • @Kristofer PISTER 260uA at 1 sun, sleep current is 150 uA. would be good to get at 1 sun.

    • @Austin Patel : cannot transmit that often, 1.6mA when transmitting, 100 uF cap across VBAT

    • @Kristofer PISTER : 280uA 150uA sleeping, 130uA charges cap, filling up cap in <100ms, so you should be able to transmitting 10 packets per second. This calculation should be in the paper.

    • @Austin Patel : created https://crystalfree.atlassian.net/wiki/spaces/SCUM/pages/481099849 and https://crystalfree.atlassian.net/wiki/spaces/SCUM/pages/481099909

  • @Tengfei Chang

    • Overview:

      • Figures almost done, preparing paper for SenSys.

      • Firmware update merged

      • EDHOC update (LAKE WG)

    • Unexplained gaps in the histogram

    • @Kristofer PISTER looks like gaps have a certain structure

    • @Thomas Watteyne Not a bin artifact when calculating the histograms (aliasing?)

      • try with another number of bins?

    • @Kristofer PISTER Run through certification test to show it is standards compliant (100% @ +/- 40 pm)

    • @Kristofer PISTER frequency offset measured on OpenMote of 13/14 corresponds to 40 ppm

    • Figures showing LC frequency over changing temperatures

      • 10 packets per second, heat up, record offset and temperature (and group by temperature)

        • whiskers (min/max ?), no outliers

  • @Timothy Claeys

    • goes through changes in OpenWSN

      • done: some bug fixes, big change: stack config now merged into main dev branch

      • todo: some further bugs, with larger networks

    • next:

  • @Thomas Watteyne

    • Some French Regions want to give us 10k for the Hornet project

      • They ask for plans (commit to dates)

    • France-Berkeley-Fund gave us an award

    • Cite des Sciences: big science museum (exhibition on robots) → advertising micro-robots (permanently or temporarily)