Heartrate with Coded PHY example from nRF Connect SDK with nRF52833 - Range is disappointing

[Felix Cormier]

Hi,

I am using two Fanstel BM833 dev kits which feature an nRF52833 to test the coded PHY feature. The advertised range is up to 1500m line of sight with the PCB antenna. I used the "peripheral_hr_coded" and "central_hr_coded" examples from the nRF Connect SDK. As-is, this code gives me a range of about 100-150m line-of-sight before the terminal tells me it lost the connection.

• What could make me increase the range further from this example? I saw a few mentions of increasing the output power but it's not clear to me where to set that.
• Also, is the heartrate example optimized for range or are there ways to increase the range further?

1-way communication (peripheral to central only) is acceptable in our application. An example that is optimized for range would be fantastic to evaluate the potential quickly!

Thanks for your help

[Susheel Nuguru]

You need to have CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y in your proj.conf for the dynamic tx power control to work.