Computer can't find BITalino Bluetooth

Bluetooth, USB, UART, Storage, etc.
rensbaeyens
Posts: 9
Joined: Fri Mar 13, 2015 3:37 pm

Computer can't find BITalino Bluetooth

Postby rensbaeyens » Fri Mar 13, 2015 4:04 pm

I am trying to connect to my BITalino Freestyle through a Windows 8.1 pc.
However, it doesn't seem to find the device.
I have tried finding it with my Android phone but this doesn't work either.
Is there any way to check if the BT-module is active?

Kind regards,
Rens Baeyens

BITalino
Site Admin
Posts: 567
Joined: Tue Aug 27, 2013 3:47 pm

Re: Computer can't find BITalino Bluetooth

Postby BITalino » Sat Mar 14, 2015 10:21 am

Hi Rens,

From the behaviour you are reporting it seems as if your Bluetooth module is not powered up.

The best way to confirm is to use a multimeter to check whether or not you have 3.3V between the DVCC and DGND pins in the BITalino BT block.

You can review the usual steps and connections involved in the assembly of a BITalino Freestyle:
https://www.youtube.com/watch?v=UG8byfWQOuo

Do let us know in case you continue to experience any difficulties.

Best regards,
The BITalino Team

rensbaeyens
Posts: 9
Joined: Fri Mar 13, 2015 3:37 pm

Re: Computer can't find BITalino Bluetooth

Postby rensbaeyens » Tue Mar 17, 2015 10:30 am

You were right, i am not measuring any voltage on the BT-module.
I have checked the connections by using the datasheets, and watching the video.
In comparison to the datasheet of the MCU the naming on my MCU is reversed ( top down = rst, tx, rx, dvcc, stat, dgnd <=> dgnd, stat, dvcc, rx, tx, rst)
I don't know if this is due to a newer version?
In comparison to the video I have left the reset pin unconnected, could this be the issue?

Thanks already for the quick response!

rensbaeyens
Posts: 9
Joined: Fri Mar 13, 2015 3:37 pm

Re: Computer can't find BITalino Bluetooth

Postby rensbaeyens » Tue Mar 17, 2015 1:52 pm

Update:
The problem is not situated in the BT module. We powered the module on a separate voltage source and this worked perfectly.
I have measured the entire PWR block, there seems to be a short between the battery power and the DVCC, as there is 0V measured at the DVCC output on the PWR block. (However, at the AVCC part it reads 3.3V, so at this side there is no problem.)
I was wondering which parts are placed between the battery and the DVCC output, and if it is possible to order these separately?

Kind regards,
Rens

rensbaeyens
Posts: 9
Joined: Fri Mar 13, 2015 3:37 pm

Re: Computer can't find BITalino Bluetooth

Postby rensbaeyens » Tue Mar 17, 2015 3:33 pm

Update 2: I have wired the Bluetooth module's DVCC input to the PWR's AVCC output, and the DGND output on the BT module to the PWR's AGND.
All problems are now solved, I do realize what is stated in the PWR documentation that this separate circuit is for optimizing measurement, but as this is a testing setup it is of no concern.

Thanks a lot for the decent feedback and support!
Rens

BITalino
Site Admin
Posts: 567
Joined: Tue Aug 27, 2013 3:47 pm

Re: Computer can't find BITalino Bluetooth

Postby BITalino » Tue Mar 17, 2015 11:20 pm

Hi Rens,

We're glad to hear that you've managed to get everything up and running.

In case you need in a near future, you can purchase just the PWR module:
http://store.bitalino.com/index.php/standard-account-store#!/Power/p/44963064/category=11569738

Do feel free to contact us for any further question you may have.

Best regards,
The BITalino Team


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