NRF54L15 ble max range?

[maya@c3mdc]

Hi,
I am conducting range testing with two nRF54L15 pdks using the Extended Advertiser and Extended Scanner sample code. One as an Advertiser and the other as a Scanner.

• The advertiser's TX power is set to +8 dBm, and the advertising interval is configured to 1 second.
• In testing, the devices remained connected up to a distance of 31 meters. Beyond 35 meters, the devices were unable to reconnect.
• However, advertising packets were still received at distances exceeding 120 meters.

The connection parameters have been left at their default settings.

What is the maximum range at which these devices can maintain a connection?

How can I achieve that maximum range with the current setup?    

Thanks in advance for your help
Maya.

[Einar Thorsrud]

Hi Maya,

First of all, I wonder which revision of the DK you have? The reason i ask is that the first revisions did not have an optimal matching network, and this leads to worse RF performance. So they are not well suited for range testing or RF measurements. If you have a kit that is version 0.9.1 or higher the matching network should be good though, but this is quite new.

What is the maximum range at which these devices can maintain a connection?

I do not have a number as this depend on a lot of factors. In addition to using a 0.9.1 or higher revision, the PHY matters, and of course the Tx power tha tyou have set high. Also, with longer packets the likelyhood of packet loss increases, and with a short supervision timeout relative to the connection interval, the number of packets that can be lost before a disconnect due to timeout is lower.

How can I achieve that maximum range with the current setup?    

The main thing is to use a new DK with good mathcing network and a high Tx power. Long supervision timeout will make the link more robust, though not increase the range itself that much.