How to connect from one Bluetooth to other Bluetooth devices

[chandanaraju]

Hi,

I am using nrf51 dk  with sdk 12.3 and softdevice S130 bluetooth module using Keil IDE.In our project we need to send sensor data from the nrf51 bluetooth module to another bluetooth module which is Tivas's bluetooth module which is in dk board.so here my question is how do i need to connect with this bluetooth module by using bluetooth  address.Bcoz Tivas bluetooth will connect through bluetooth address with different module.

so plz how do i connect through bluetooth address and tell me  which example program do i need to use for this.

[awneil]

chandanaraju said:

we are using CC2564MODA

It would be helpful to give a link.

That sounds like a TI device ?

You didn't answer Edvin's question - is this device running as a Central?

If so, then your device will have to be a Peripheral

Again, do you understand the roles of Central and Peripheral in BLE ?

If not, then you need to do some reading-up on the basics of BLE

There are plenty of introductory materials on the interwebs; eg,

https://embedded.fm/blog/ble-roles

https://learn.adafruit.com/introduction-to-bluetooth-low-energy

For Nordic specifically:

https://www.nordicsemi.com/Get-Started

https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/introduction-to-bluetooth-low-energy-and-ble-devel

No doubt TI (or whoever) also have similar resources for their products...

EDIT

For getting started, it's probably easiest to stick to products from one source - rather than also having to get to grips with two different product lines, tool chains, documentation structures, etc, etc, ...

[chandanaraju]

Thanks for replying.

I have attached below the link of cc2564 moda datasheet.Yes that is TI 's bluetooth  but controller we are using is Tiva's controller.Yes tiva controller is acting as a central(master) which also it should connect to tablet(slave) and one more slave device(nrf51 ). so now i need to know how to connect from nrf51 to tiva controller.

[chandanaraju]

http://www.ti.com/lit/ds/symlink/cc2564moda.pdf

[chandanaraju]

ok

[Edvin]

Ok. Based on the information in this ticket so far, you have another BLE device acting as a central which you want to connect to the nRF51, and you want to use this link to send some sensor data.

The peripheral is the device that is advertising, and the central is the device that is scanning for and connecting to a peripheral. So you need to make the nRF advertise (most examples in our SDK does this. Look at the examples in SDK\examples\ble_peripheral. E.g. the ble_app_uart example. 

Then you need to make your central connect to this device, based on some filter in the central. Either address or some part of the advertising message (Advertising name, advertised service uuids, etc.).

I am not familiar with TI's SDK solution, so you would need to ask them.

In addition, if you want to transfer sensor data from the nRF to the central, you need to use a BLE Service and characteristic for this.

I suggest you walk through these three tutorials in this order:

1: https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-advertising-a-beginners-tutorial

2: https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-services-a-beginners-tutorial

3: https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial