Update on USB Disconnect Issues (unable to detect USB modules during scan)

[jrasor]

I'm seeing total USB scan failures with the new REV Robotics expansion hub. Details, while experimenting with the hub, two motors, a servo and two sensors just wired up and sitting on a table top:

Adding servo support. HiTEC HS-485HB servo initializes (moves to 0.5 position). Then another USB scan failure. Restart both phones: USB scan good. Servo initialized, then another USB scan failure. Made different servo initialization method.
Servo stopped working. Try another: nope. Try another port, with change of configuration file: nope. Try the external servo sample: nope. Position report changes, but no actual servo motion. Back to port 0, with change of configuration file: nope. The motor test runs.
Run the servo sample with no servo: no voltage on any port 0 pin, or any other servo port pin. Battery and +5V pins correct. Swap hubs, rewrite configuration file: nope. Motor test runs. No voltage on any of swapped-in hub servo pins.

[Rachel]

Hi jrasor,

If you would please write into our support email [email protected] we'd love to look into this issue with you.

Best,
Rachel from REV

[jrasor]

Thanks, Rachel! I'll write to your support people.
Meanwhile, some info from today's logcat. Support will get this.



1:07 re-deploy, run again to completion. Log says


Time PID TID prior tag message

================================================== ==============

13:06:35.249 6469 6639 V LynxPwmOutputController: initializeHardware() mod#=2
... skipped tons of blather about battery checking and garbage collection ...
13:06:35.259 6469 6639 W RobotCore: LynxSetPWMEnableCommand not implemented by lynx hw; ignoring. It tried 4 times to do this and LynxSetPWMConfigureCommand. That is definitely no good; servo needs pulse width modulation.
[B]