https://devzone.nordicsemi.com/f/nordic-q-a/59008/what-case-affect-the-communication-rangeHi, I found the communication range using FREERTOS is shorter than which are using non-RTOS. I know the RADIO TX power and the PHY rate affect the communication range，but there are any other factors could affect the commnunication range? Thanken-USTelligent Community 13Fri, 13 Mar 2020 12:45:26 GMThttps://devzone.nordicsemi.com/thread/239725?ContentTypeID=1Fri, 13 Mar 2020 12:45:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5d289c7b-971e-4ae2-b079-048117083df2Susheel Nuguru<p>sensitivity is fixed per chip variant and the protocol/PHY selected.</p> <p>You can configure the TX power though.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/239631?ContentTypeID=1Fri, 13 Mar 2020 03:23:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2914b5e0-b601-4390-9e63-fd66294bf994jhc<p>So how can I modify the Radio sensitivity. I am using SDK15.2.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/239531?ContentTypeID=1Thu, 12 Mar 2020 12:52:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:017491c1-5d88-4831-a645-f0eebe630012Susheel Nuguru[quote user=""]I know the&nbsp;RADIO TX<span>&nbsp;power</span>&nbsp;and the&nbsp;PHY rate affect the communication range，but&nbsp;there are&nbsp;any other&nbsp;factors could affect the commnunication range?[/quote] <p>&nbsp;Using any RTOS or not should not affect the range of the connection. As you mentioned, it depends on PHY/Radio sensitivity and TX power.</p><div style="clear:both;"></div>