PC can't find IOIO bluetooth

[Jonathan W]

I have a IOIO-OTG with the following versions reported by the IOIODUDE application:

Hardware version: SPRK0020
Bootloader version: IOIO0400
Application version: IOIO0506

The problem is getting the Bluetooth to work.  USB connection to my PC (Windows 8.1) is working now, though not at first.  At first Windows kept saying it was not a recognized device and would not let me select the driver for it.  Once I started the IOIO in bootloader mode then Windows finally enumerated the USB connection.  I took the opportunity then to update to the 506 application firmware (prior to that IOIODUDE reported "Platform version: IOIO0030" instead of an Application Version).  Now USB connection works fine even in normal boot mode.  Perhaps this bit about starting in bootloader mode will help others too.

So now for the Bluetooth...  My PC recognizes and pairs with a Bluetooth mouse as well as my dumb phone without any trouble.  So I know that the PC's own Bluetooth is working.  I am using the USB cable and Bluetooth adaptor that came with the IOIO.  I have a 6V power supply and I have the charge limiting potentiometer turned fully clockwise and I have the mode switch set to "H".  I have tried powering up the IOIO with the Bluetooth adaptor already plugged in and also tried powering up the IOIO first and then plugging in the Bluetooth adaptor to the USB cable.  Still when I go to Windows 8.1's "Bluetooth Settings" app and watch it trying to discover devices it does not show the IOIO.  What I am missing?

[Ytai Ben-Tsvi]

You seem to be doing everything OK. The mode switch to "H" thing is not typically needed ("A" is for "auto-detect" and should work).

If your power supply is adequate, the only problem I can think of is the dongle itself. Try a different one. There's a list of known working ones on the wiki and some of which are very cheap.

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[Jonathan W]

Thanks for the reply.  I ordered a different dongle (one from the list you referred to) and also a new adapter cable for it.  I'll post back with results in a few weeks (waiting now for overseas shipping).

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[Jonathan W]

Update:  The Bluetooth connection is working now with a replacement USB-OTG cable.  With the original cable the LED in the Bluetooth dongle would turn on steady.  With the replacement the LED on the dongle blinks every few seconds and communication works.  However it seems like Windows 8.1 is being ornery about reconnecting after the IOIO is unpowered and later powered on again.

Here's my working configuration as a reference for others:

 - Windows 8.1 laptop (HP, built-in Bluetooth)

 - IOIO-OTG:

  -- Hardware: SPRK0020

  -- Bootloader: IOIO0400

  -- Firmware ID: IOIO0506

 - Bluetooth dongle: the one that came with the IOIO.  Looks similar to the CSR V4.0 listed on the page of supported dongles, except this one has no external labeling.

 - USB-OTG cable: Newegg p/n 12-400-315 (StarTech cable)

 - Tested with <java -Dioio.SerialPorts=COM7 -jar HelloIOIOConsole-5.07-standalone.jar>

 - Also tested with my own JafaFX application compiled with JDK 1.8.0_60-ea, IOIO application version 0507, purejavacomm 1.0.0, and JNA 4.2.1

The remaining trouble seems to be that Windows does not reconnect gracefully once the IOIO has been unavailable and then available again (same Windows session).  I have to go to the Bluetooth Settings "Manage Bluetooth Devices" screen, manually remove the previous connection, wait for Windows to rediscover the IOIO, and then pair again.  After this the COM port number sometimes changes so then I have to go to "Change Bluetooth Settings", to the COM Ports tab, and then find the Outgoing port for the IOIO.  For some reason this takes Windows a few minutes to perform.  I've tried not specifying any port number but HelloIOIOConsole never seems to connect without the port having been specified.