Inline On Mon, May 4, 2015 at 1:56 PM, klaus Schoenborn <kschoenb...@cadfem.de> wrote:
> Hi there, > I am new to IOIO. I am currently working on a project to install a > Smartphone into a glider cockpit. The IOIO-OTG board is hosted by a PCB > Board from Soartronic http://www.soartronic.net. I do have an issue in > communicating with the most recent IOIO-OTG board over USB cable. > > Summary: > The communication is set up only 1 out of 10 attempts when the IOIO Board > is connected to the Smartphone via USB cable. > The communication is set up 10 out of 10 attempts when the IOIO Board is > connected to the Smartphone via Bluetooth dongle. > > Hardware used: > IOIO Board = IOIO-OTG from Spankwire > IOIO Lib = 000504 > Application Firmware = IOIO0500 > Bootloader Firmware = IOIO0401 > Hardware = SPRK0020 > > All the other details on hardware/software/testruns can be found in the > attached text file. > > Q #1: Has this been reported before ? > Not as far as I can remember. Usually when problems are connected they are "never connecting" as opposed to "almost never connecting". > Q #2: Is the hypothesis that this is an IOIO-OTG Boot issue reasonable ? > Almost certainly not. There isn't really any "booting" in the IOIO firmware in the normal sense. The initialization code is very deterministic, I wouldn't expect it to change its behavior between attempts. In other words, if it were broken I would expect it to always fail. > Q #3: If #1 and #2 are true: Is there something that I can do about it ? > A few possible causes: - IOIO oscillator is miscalibrated. Recalibrate using the procedure described on the IOIODude wiki page. - Flaky power supply. If you're not 100% certain about your supply, try a different one, possibly one that is not exactly 5V, but more and one that is rated for at least 1A. - The current limit pot on the IOIO is too agressive. Turn it fully clockwise. - IOIOLib issue: I've recently made some changes to the OpenAccessory area of IOIOLib, reported by several users to have increased reliability. I haven't release this yet, but the latest master from GitHub has it. > I can stick with Bluetooth, but the original plan was to power the > Smartphone over the IOIO-OTG Board. Thanks in advance for helping me. > USB should be much more reliable than BT, almost by definition. You shouldn't be seeing any issues with a proper setup. This has been tested very rigorously. > kind regards > Klaus > > -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to ioio-users+unsubscr...@googlegroups.com. > To post to this group, send email to ioio-users@googlegroups.com. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to ioio-users+unsubscr...@googlegroups.com. To post to this group, send email to ioio-users@googlegroups.com. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
