I am not able to connect through Bluetooth using Coin cell in nRF52840 DK board

RE: I am not able to connect through Bluetooth using Coin cell in nRF52840 DK board

Karl Ylvisaker — Thu, 03 Jun 2021 10:20:47 GMT

Hello Jyothi,

[quote user="Sai jyothi"]Thank you for your response.[/quote]

No problem at all, I am happy to help!

[quote user="Sai jyothi"]I flashed the board with BLE example and connected through coin cell. Now LED's are blinking and DK board connected to nRF connect mobile app through BLE. Thank you...[/quote]

I am glad to hear that this resolved your initial issue, and that the board now is working as expected - great! :)

[quote user="Sai jyothi"]But DK board is not connected to nRF connect desktop App. Can you explain the probable reason.[/quote]

Please elaborate on the issue you are facing. The more details you provide us, the easier it will be for us to resolve your issue.
What are you seeing in the nRF Connect desktop application? Are you able to scan for advertising devices? Do you find any devices at all, and are you able to connect to any of these devices?
What device are you using for your connectivity bridge for the nRF Connect application?

Best regards,
Karl

RE: I am not able to connect through Bluetooth using Coin cell in nRF52840 DK board

Sai jyothi — Wed, 02 Jun 2021 09:47:48 GMT

Hi Karl,

Thank you for your response.

I flashed the board with BLE example and connected through coin cell. Now LED's are blinking and DK board connected to nRF connect mobile app through BLE. Thank you...

But DK board is not connected to nRF connect desktop App. Can you explain the probable reason.

Regards,

Jyothi.

RE: I am not able to connect through Bluetooth using Coin cell in nRF52840 DK board

Karl Ylvisaker — Tue, 01 Jun 2021 14:33:49 GMT

Hello Jyothi,

[quote user=""]

Inserted coin cell in the given slot.
SW9 (nRF Power source) position set to LiPo.

[/quote]

An exempt from the Power Source section of the nRF52840 DK documentation reads:

In the VDD position, the SoC is powered either from the onboard buck regulator, coin cell battery, or external supply (P21). In the Li-Po position, the high voltage regulator of the SoC is supplied directly from the Li-Po battery connectors (J6 or P27).

Please set the switch to VDD, and see if your kit starts responding. Furthermore, make sure that SW6 is set to DEFAULT if you intend to use the Interface MCU.
If the board is flashed with a peripheral BLE example it will indicate that it is advertising by blinking LED 1, and you should see it show up in your nRF Connect BLE application when you are scanning for BLE devices.

Please do this, and let me know if it resolves your issue.

Best regards,
Karl