Monthly Archives: August 2015

more progress

Last night we worked on the wiring for the bicycle wheel – with a focus on robustness.  We want to be able to throw it in the rack on a train and not worry about any of the wiring breaking – and we don’t want anything shorting out on all those metal spokes!  And we have a bit of a chicken-and-egg problem – we don’t want to machine sew around the wires, but we don’t want to wire into some complex object, either.   Our solution – undocumented by photographs as usual – involves quilt batting and beading with our old standby, heat-shrink plastic.

Continue reading more progress

I think we’ve cracked the wireless…

I think I’ve finally figured out why our equipment performs flawlessly in test situations, and then goes down and stays down in our real target buildings.   It’s something about the firmware on the wireless dongle (the EDIMAX EW-7811UN).  In a nutshell:  when the wireless signal strength is low enough, then the networking releases the DHCP address and disassociates the wireless connection from the dongle.  I don’t know yet whether it checks the signal strength periodically to try to reconnect, because even if the dongle is in an area with good signal, it still reads the strength as zero. Continue reading I think we’ve cracked the wireless…