07-Oct-2019

Owned by Thomas Watteyne
Last updated: Oct 07, 2019
2 min read

Attending

  • @Jove Yuan

  • @Lydia Lee

  • @Kristofer PISTER

  • @Titan Yuan

  • Raymond?

  • @Felipe Campos

  • @Ahad Rauf

  • Brian Kilberg

  • @Thomas Watteyne [remote]

  • @Tengfei Chang [remote]

Action Items

@Thomas Watteyne to commit working TSCH code to repo
@Tengfei Chang to create Jenkins job which runs SCuM tests, @Lydia Lee to install hook

Minutes

  • @Tengfei Chang

    • gives an update on the software workflow

  • @Thomas Watteyne

    • upload your pic to your profile

    • getting page contents programmatically

  • @Lydia Lee

    • getting rid of ASC magic number

    • discussion about #define vs enum vs variables

  • @Jove Yuan

    • optical programmer upgrade

    • random spikes on the programmer

    • mote isn’t receiving everything, something isn’t been received, debugging

    • performance depends on the chip, may be because reflections in the package

    • @Kristofer PISTER : right path forward? can we get a visible light LED with a broad enough spectrum and that is fast enough (1MHz?)

    • @Kristofer PISTER : good ideas, send to Jove

    • @Kristofer PISTER : try out the different angles

    • @Kristofer PISTER : do we have a circuit explanation why we can program, but not calibrate?

    • limitation of the analog discovery to capture the SFD (??)

    • Jove to talk to Kris

  • @Titan Yuan

    • SCuM to OpenMote calibration

      • looking at OpenMote serial port ()

        • length

        • coarse

        • mid

        • fine (0..31)

        • RSSI

      • many lost packets, valid RSSI

      • is SCuM sending the wrong packet contents with the right CRC?

      • @Kristofer PISTER : make sure to explain detail

      • 01bsp_radiop_rx is what is running on OpenMote

      • Scum sends million packets to OpenMote only couple of packets is received

      • @Kristofer PISTER : please check whether you are checking CRC

    • BLE:

      • couldn’t get BLE to work on Q4

  • Raymond?

    • BLE transmitting

    • looking at beacon apps. Formats: Apple has iBeacon, Android has Eddystone which includes telemetry data. THere are Android/iPhone apps that display this.

    • @Kristofer PISTER : please do a presentation on apps which do things with BLE beacons; find what to do on SCuM to send data to those apps

    • let’s demonstrate the world’s smallest compatible beacon

  • @Felipe Campos

    • SCuM with interrupts, not using Brad’s polling code, instead use capture registers (see Sahar's code)

    • will lowering timing errors (lighthouse, etc)

    • lots of problems from UART

  • @Ahad Rauf

    • SCuM current testing

    • the high current chips where due to ASC settings (ldo’s, ADC, etc were on)

    • solution was to onto change certain bits in the ASC

    • weird: if changing the ASC setting from setting1 to setting2 doesn’t change the current. You need to power cycle the mote when going from setting1 to setting2.

    • enabling/disabling on-chip LDO

    • when unprogrammed, switches between 250uA and 350uA

  • Brian

    • looking at debouncing the lighthouse signals

    • processor speed used? 20 MHz?

    • cool demo on 3D localization with lighthouses on SCuM

Admin

  • can projecting computer also join the meeting and share screen?

  • encourage people to create accounts on crystalfree.org (and upload pictures)

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