https://devzone.nordicsemi.com/f/nordic-q-a/6356/sub-ghz-and-bluetooth-nrf905-and-nrf51822-shockburstHi, Is it possible to connect nRF905 to nRF51822 via SPI, add ShockBurst code nRF51822 and then use alternately/simultaneously Sub GHz and Bluetooth communication? I&#39;m making an underwater wireless sensor network and 2,4GHz can&#39;t go through even aen-USTelligent Community 13Fri, 02 Mar 2018 21:49:22 GMThttps://devzone.nordicsemi.com/thread/122673?ContentTypeID=1Fri, 02 Mar 2018 21:49:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b62d53c-3d72-4810-8dfa-476a1d81943aAmbystomaLabs<p>You will need to run at very, very low frequencies.&nbsp; The&nbsp;41MHz band might be a good choice. It is very narrow, so you won&#39;t have very high data rates.&nbsp;&nbsp;</p> <p>Even then you will need a pretty&nbsp;big link budget to even transmit a couple of meters.&nbsp; Water is really, really lossy.</p> <p>Someone else had a question on this a while back.</p> <p>Here is the link:&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/28230/btle-beacon-strength/111492#111492">https://devzone.nordicsemi.com/f/nordic-q-a/28230/btle-beacon-strength/111492#111492</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/122666?ContentTypeID=1Fri, 02 Mar 2018 20:02:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b64e079c-0097-45b9-819e-2fd1c2ffba1cRicFlair<p>Has a Solution to this been provided?</p><div style="clear:both;"></div>