https://devzone.nordicsemi.com/f/nordic-q-a/40213/tx-power-nrf52840Sir We have a client that is using two NINA B3 (uses a NRF52840), one central and other peripheral. The peripheral is sending advertising packages, but the central is only detecting them in the 150mts range, no more. Is there some sdk example thaten-USTelligent Community 13Wed, 07 Nov 2018 20:22:33 GMThttps://devzone.nordicsemi.com/thread/156382?ContentTypeID=1Wed, 07 Nov 2018 20:22:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3d6275c4-4ae2-4332-9996-05e25b6de268Miguel<p>Thank you again Andreas!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/156306?ContentTypeID=1Wed, 07 Nov 2018 12:43:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3a3d4678-b9d1-4700-bf04-7121e898219bAndreas<p>Hi,</p> <p>&nbsp;</p> <p>No, there is no external PA on that module from what I can see. The conducted output power is 7.5-8 dBm, but the<a href="https://en.wikipedia.org/wiki/Effective_radiated_power"> EIRP </a>is 10 dBm. Snip from the datasheet:</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-69e6c531cc6c47f4aadab73e5dea79bf/nina.PNG" alt=" " /></p> <p>Even if there is an external 10dBm PA, you would want to dial down the output power from the nRF52840 (most likely to 0 dBm) to get the most efficient operation with 10 dBm saturated output power.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/156279?ContentTypeID=1Wed, 07 Nov 2018 10:29:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0215aa2c-7f90-4ef8-a246-5575b8687f61Miguel<p>Andreas, thanks to the feedback!</p> <p>I will ask to our client add to</p> <div>C:\nRF5_SDK_15.0.0_a53641a\modules\nrfx\mdk\nrf52840_bitfields.h</div> <div></div> <div>The following line</div> <div></div> <div>#define RADIO_TXPOWER_TXPOWER_10dBm (0x10UL) /*!&lt; 10 dBm */</div> <div></div> <div>Right ?</div> <div></div> <div>Looks that module has PA</div> <div></div> <div></div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/156262?ContentTypeID=1Wed, 07 Nov 2018 07:39:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:69b0e043-301e-4193-bd70-8e43960aab37Andreas<p>Hi,</p> <p>&nbsp;</p> <p>8 dBm is the maximum output power of the nRF52840. To increase this you need to add a power amplifier or front-end module in your RF chain, but transmitting at more than 10 dBm is only allowed in the USA.</p> <p>You can also change to the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/radio.html?cp=2_0_0_5_19_13_11#register.MODE">BLE long range modes</a> to extend the range.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>