@Austin Patel has some suggestions for changes to @Andrew Fearing
how to operate IMU off battery? IMU VDD and DVVIO need 1.7V, battery only supplies 1.55V
regulator? how to integrate with Anju’s batteries (4.2 to 3V is the range for her batteries)
@Kristofer PISTER : simplest setup to get people up and running → having wire power is fine. PoC with wires is OK (e.g. virtual keyboard). Let’s not try to put too much, do as simple as possible.
battery holder for SR416SW: only SCuM works. If you want to run the IMU, connect an external 1.8V power source to a pair of pins
antenna options are
@Kristofer PISTER : for PoC probably fine to have the antenna trace to a through hole for a header, connect a wire to it.
@Fil Maksimovic agrees, chip antennas on chip antennas should not work. MIMSY is the counter-example. Simple wire on the through hole in the past has worked pretty well. We could so some antenna testing in the Inria anechoic chamber.
@David Burnett : reason for a chip antenna is that have experience with OpenMote chip antennas