David Burnett Submitted paper to ISCAS2022
Got SCuM to talk to nRF while nRF is running a BSP function
Is received by nRF but packet contents need debugging; could be bitwise interpretation issues
nRF is clearly receiving a packet from SCuM though
Getting things working with OpenWSN 2.0 w/ cmake; BSP radio functions seem to build correctly
Suggestions for testing Sulu board by Berkeley team:
Power consumption
Logic analyzer set to 19200 baud connected to SCuM’s UART output
BSP is expected to work fine for more complex tests. BSP is not currently integrated into SCuM programmer code; needs to be merged (should be simple).
Kristofer PISTER Maybe simpler in the short term to use nRF for programming and OpenMote to test RF communication
Austin Patel to supply OpenMote code (add link here please)
Clock calibration is done through the nRF
Current programming method involves holding VDDD at 1V for debugging simplicity
Local bond house quote £2000, looking around for alternatives
Andrew Fearing 2 sulu boards, optically programmable, seem to be working
Both boards use DCDC converters but are missing 1 inductor on each board so tests were undertaken using external 1.8v supply
Measured current using “allgpiotoggle”
Current consumption after tap differs because due testing is at 1.5v whereas PCB testing was done at 1.8v.
Increased current when VDDIO=VBAT instead of 0 could be due to GPIO output signals on by default and driving PCB traces, etc.
Mina Rady suggests using his UART relay functions
Joshua Alexander Updates on SCuM/nRF communication
Transfer of scum programmer firmware to nRF suffers from random disconnections
Next want to verify nRF programming works at 1.1v? 1.8v?
Verify optical programming works at expected VDD values
Test UART, IMU, DCDC (once L soldered on); need schedule and responsibility division between Joshua Alexander and Andrew Fearing
Mina Rady ran 11 km link (1 hop) using two OpenMoteB at 868 MHz
FSK, battery powered, 50 kbps, ~60 mW consumed in TX or RX
OpenMote B can listen at 2.4 G and TX at 900 MHz or vice-versa