Attending

• @Kristofer PISTER

• @Titan Yuan

• @Jove Yuan

• @Meera Lester

• @Alex Moreno

• @Lydia Lee

• @Thomas Watteyne [remote]

• @Tengfei Chang [remote]

Action Items

@Tengfei Chang complete the frequency sweep test from OpenMote to SCuM on other channels

@Tengfei Chang design frequency scan algorithms

Minutes

• @Titan Yuan

  • SCuM BLE TX/RX

  • There are still some random bit errors when checking for 32-bit target value from BLE RX

  • However, interrupts (STARTVAL_ISR and RAWCHIPS_32_ISR) are being triggered correctly (verified by turning the Analog Discovery on and off)

  • If I flip an error in the input, interrupts (STARTVAL_ISR and RAWCHIPS_32_ISR) are no longer triggered, so bit errors might be a hardware/timing issue independent of whether the 32-bit target value has been seen or not

  • Note: after enabling STARTVAL_ISR, it always triggers once after optical calibration even if 32-bit target value has not been seen

• @Jove Yuan

  • Update on the programmer

  • Calculated the power delivered to optical receiver of each LED

  • Tested optical receiver with another Teensy logging OPTICAL_DATA from SCuM, Teensy (the one used for logging) reads wrong values

  • @Kristofer PISTER Just use the logic analyzer instead of using Teensy to test

  • @Thomas Watteyne Recommended logic analyzer saleae

• @Tengfei Chang and @Thomas Watteyne

  • update on frequency sweep experiments

    • OpenMote picks up alternate channel transmissions, explains some earlier results

    • non-linearity of coarse.mid.fine calibratino explains earlier results

    • new results on OpenMote->SCuM calibration

  • all code submitted as PRs, together with tests to run tests on Jenkins at each future PR

  • next week:

    • understand whether we can infer RX settings from TX settings reliably

    • understand whether we can infer “freq+N” settings from “freq“ settings

    • design quickscan algorithm

    • come up with design for cold-boot calibration, options:

      • “Cal box“ with 16x (or less) OpenMotes which ACK

      • “Cal box“ with some OpenMotes which send beacons periodically (fast)

      • just listen to a 6TiSCH network

• @Meera Lester

  • ADC rate-spot testing

• @Alex Moreno

  • update on SCuM and zappyv2

  • show the result of VDDSCuM I vs V under 2 suns

  • video shows SCuM is working with solar powered