Update IMU data reading
IMU average: 66Hz
Lighthouse 75Hz
Kalman tracking
(voice lost)
Attitude tracking
(voice lost)
Summary
higher IMU data rate helps estimation
IMU packet data rate fluctuates when lighthouse packets are being sent
Yaw tracking isn’t really working.
Reducing the digital LDO … (missed) ???
Trying to run simulation of Brad’s SCuM3B testbench to loook for the current leakage, the simulation doesn’t show the leakage current
Solution next step: to try on a new testbench.
Transmitting on SCuM with solar panel
monitor the current during different status of radio
Goal is to run on the SARA board with solar
Able to transmit 13ms with 2 solar illuminate [need to confirm]
SCuM Tx on solar, current drops before transmitting
printf is executed before transmitting, and during printf the current, the current drops (not sure is because of this)
SCuM Tx without solar
Optical calibration limitation
try to find the influence from the power supply to the calibration result.
Kristofer PISTER it’s possible to model the voltage coefficient and temperature coefficient with LC frequency,
next step:
send a packet from SCuM to the MEMS gripper and switch-off, with solar powered.
read IF estimate need to be done before calling radio_rfOff()
Use IF to calibrate the LC frequency , ideally OpenWSN will use this method to calibrate LC.
Test SCuM radiation (transmitting range?) up to 48in at 20 degree SCuM is able to convey data to (without wire bonded Antenna)
VLSI figures are ready, will write up the text this week
Wire bonding of SCuM
Ask Alex Moreno about the type of wire used for SCuM. Kristofer PISTER SCuM should be use wedge bonding, but shouldn’t make a difference.