pmodBLE

[Ely4]

Hello,

I've got the connection between two PmodBLE, but I lose the connection when I turn off them.

Is there any option that keeps the coonection still turning off the pmodBLEs?

Thanks,

Ely.

[vicentiu]

Are you expecting the PmodBLE to stay connected when it has no power or are you expecting the two PmodBLE's to reconnect automatically once they are powered up?

[Ely4]

I'm expecting the two PmodBLE's to reconnect automatically once they are powered up.

Do you know how can I do?

Thanks,

[vicentiu]

How did you make the initial connection?

Can you make that happen automatically when the boards are powered up?

[JColvin]

Hi @Ely4,

I'm not certain if they will automatically connect since Bluetooth Low Energy is more security oriented than Bluetooth classic and requires the various associated bluetooth characteristics to be shared and confirmed between the two devices. Based on section 2.6.13 of the RN4871 User Guide, if a bonded connection is lost due to any reason (such as a power cycle), reconnecting with the device does not bond the devices again and provide a secure link (if that is of concern for you).

You may be able to utilize the scripting capability to preload the known characteristics (which you can find out be connecting to a Pmod BLE through a BLE phone app) that is part of the RN4871, though I personally haven't used that feature of the chip.

Thanks,
JColvin