Page 377 - Hacking Roomba

358 Part III — More Complex Interfacing

FIGURE 15-17: The peripherals plugged into a small USB travel hub

When plugged in to the SL, lsusb provides the following output:
root@OpenWrt:~# lsusb
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 002 Device 006: ID 058f:9254 Alcor Micro Corp. Hub
Bus 002 Device 007: ID 067b:2303 Prolific Technology, Inc. PL2303
Serial Port
Bus 002 Device 008: ID 041e:4034 Creative Technology, Ltd
Bus 002 Device 009: ID 08ec:0008 M-Systems Flash Disk Pioneers
Bus 001 Device 001: ID 0000:0000

Measuring Current Consumption
Power consumption is always an issue with portable devices. In this case it’s worrisome because
there are so many devices in the mix. It may be that the power budget is blown and none of
this will actually last for any reasonable amount of time on a battery pack.