Attendees

Action Items

@Fil Maksimovic SCuM can stay synched at 10 s intervals with 1.5 ms guard time.
- Network was OpenMote (root) → scum → scum. Adding 1 more scum is next.
- Maybe getting an OpenMote to join the network with a SCuM parent after a chain of 2-3 scums.
- Would require using opentimer instead of direct access to capture/compare registers
- Beware low PDR (60-70%) if the receiver is on for a long time vs. being duty cycled. Root cause as yet unknown.
  - Also helpful is to powercycle the radio every ~100 ms.
  - Open question is whether the missed packets are periodic, e.g., 3 OK 1 missed etc.
- @Austin Patel interested in a star network, OpenMote (root) → 5x scum, current results should support that network.
  - Data rate will be limited because OpenMote can only Rx from one scum at a time.
  - If OpenWSN is using 10 ms slots, mean latency should be 25 ms. Packet loss must be accounted for too.
  - Music needs 1 ms latency, typical gaming is 20-70 ms response, high performance gaming is 1 ms. Typical human eye to hand reaction time is 70 ms.
Tarak Arbi presented slides about BPSK demodulation
- Per Fil, looks like bank 1 GPOs 8-15 output have I_LC<1:4> and Q_LC<1:4> I think those are the two 4bit ADCs. We may be able to use those GPOs to get sampled IF output and try to do BPSK demod.