Attending

@Kristofer PISTER
@Felipe Campos
@Meera Lester
@Jove Yuan
@Titan Yuan
@Ahad Rauf
@Alex Moreno
@Thomas Watteyne [remote]
@Tengfei Chang [remote]

Action Items

@Tengfei Chang Create/Update bsp project to have OpenMote print out the frequency offset

@Tengfei Chang Write the script test for the base demo code

@Tengfei Chang Conduct the frequency sweep test

@Thomas Watteyne Thought about standardizing an IE containing the frequency offset?

Minutes

@Kristofer PISTER
- Brian was able to get sweeping going
- update about flex PCB: 3C, 377 battery clip, chip antenna. What other boards do people need?
- calibration: 2 orthogonal axes of progress:
  - 1) understanding/implementing the best way of doing spectrum analyzer-free calibration
  - 2) doing something simple/practical to get demos working.
  - For now, keep thinking about 1, but focus on 2. let’s get a temp sensor demo
- Lydia and Alex are trying to get more dev boards
- what would you want?
- SCuM and zappy2, we should be able to bond them to get them running with one sun illumination
- get chatty on the ML
- test program that exercises everything in the chip
  - just writing 1’s and 0’s to memory, and see if problem
  - because of the loopback capability, we could do stuff with the GPIOs
  - test program should run on any chip
- send ideas for boards to ML
@Felipe Campos battery-less SCuM
- LDO regulators
- discussion about mechanical coil oscillation
- discussion about having someone from EE140 to design support chips for SCuM
- @Kristofer PISTER : send ideas about support chips to ML
- next steps: send packets
- 2mm x 2mm printed, at C/20 discharge 120 uAh, starts at 4V, drops down to 3V. A student could turn the 3-4V . 1-2h of lifetime,
- 50 uA / MHz is the Cortex
- 260/310 uA is what we measure, 3.3 MHz, bringing down the uC speed would shave off 150 uA
- optical receiver is running now
- discussion about how cost of sending beacons
@Meera Lester
- questions for Lydia
- use ADC to confirm sine wave input
- @Kristofer PISTER : please use ML
- SCuM interrupts are level sensitive, if you don’t disable the GPIOs, it keeps firing
@Jove Yuan optical programmer upgrade
- ordered high-power LEDs, will arrive later this week
- using laser to do optical calibration, successful programming disables optical calibration
- is something in the code disabling
- discussion about hello world application, believe works with IR LED
- analysis of the behavior of bootload.py , analysis of a calibration packet, 500/500/2/2 are cycles in Brad’s code. Laser does transmit the right thing, unclear what happens. The optical receiver receives the bits correctly.
@Thomas Watteyne
- presents update about Jenkins integration
- @Kristofer PISTER : should we standardize an IE which contains the frequency error?