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)