https://devzone.nordicsemi.com/f/nordic-q-a/22834/build-custom-radio-protocol-for-low-data-rate-and-long-distanceHello, I would like to build two boards that can send small messages between them, at long distance. For that I would like to use some of your devices (I used 51822 in the past for BLE connectivity) with a custom radio protocol. The message itselfen-USTelligent Community 13Sat, 17 Jun 2017 14:42:04 GMThttps://devzone.nordicsemi.com/thread/89776?ContentTypeID=1Sat, 17 Jun 2017 14:42:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5f3953e-3009-485f-b7ac-6b124eabbc8eAdrian Lita<p>Thank you for the answer!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/89775?ContentTypeID=1Sat, 17 Jun 2017 06:54:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:223d95ae-41c6-4b9c-aa8d-9ad5023ea155FormerMember<p>With the nRF51 in 250 kbps mode, it is possible to achieve a range of 300 m, line-of-sight, you can read more in <a href="https://devzone.nordicsemi.com/question/96930/what-type-of-transmitterreceiver-can-suit-this-purpose/?answer=97028#post-id-97028">this</a> thread.</p> <p>You can also have a look at the <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52840.ps%2Fradio.html&amp;cp=2_1_0_21&amp;anchor=concept_lhd_ygj_4r">nRF52840</a> with its various data rate options. The nRF52840 has a maximum output power of 8 dBm. Perhaps <a href="https://devzone.nordicsemi.com/blogs/1076/nrf52840-long-range-demo/">this</a> blog post about long range testing with the nRF52840 can be interesting.</p><div style="clear:both;"></div>