BLE central peripheral rssi communication

[pktron]

Hello All,

I came up with one application .. where we are planing for industrial application , my requirement is as below,

there will be two nrf52810 chips one will be on asset and another will be in vehicle. so once the vehicle comes near the asset it should give an alarm . So here how we can read(asset) the RSSI values  of Vehicle. . so that my asset which is having nrf52810 should read the RSSI value of other device which is place in vehicle?

So please confirm which profile i can use for reading the RSSI values. I will be requiring 2 way communication. 

How can i read the RSSI values . 

please confirm

Thanks in advance

Pktron

[Joakim Jakobsen]

Hi pavan!

This should be achievable.
I would suggest that you take a look at the Proximity Profile.
"The Proximity profile defines the behavior when a device moves away from a peer device so that the connection is dropped or the path loss increases above a preset level, causing an immediate alert.
The Proximity profile can also be used to define the behavior when the two devices come closer together such that a connection is made or the path loss decreases below a preset level."

The Proximity Application (ble_app_proximity) is an example in our SDK that implements the Proximity profile.
The applicatoin alerts the user when connected devices are too far apart, but you should be able to use this as a template for your application.

Be sure to let me know if you have any more questions.

Cheers,
Joakim.

[pavan]

Hi, 

Thanks for your information.

But how can i read the RSSI value , weather any kind of data transmission possible in this profile? also I want to communicate between 2 controllers(nrf52832) . not between smartphone and device.

Thank you 

[pavan]

Hi,

Can please confirm on my above query

[Joakim Jakobsen]

Hi again.

You can start reporting the RSSI on, i.e the event BLE_GAP_EVT_CONNECTED.
You start reporting the RSSI with sd_ble_gap_rssi_start().
This will return a new event whenever the RSSI value changes, until sd_ble_gap_rssi_stop() is called.

After you have started reporting, you can use the function sd_ble_gap_rssi_get(), to get the received signal strenght for the last connection event.

If you want to test this with two nrF52832, you can make a simple example to test this, for example using the uart central and peripheral examples.
Add the RSSI code to the peripheral and send it over uart to the central.

Let me know if you have any questions regarding this.

Best regards,
Joakim.