https://devzone.nordicsemi.com/f/nordic-q-a/68626/time-sync-with-millisecond-accuracy-with-nrf52840-dongle-by-combining-usb-cdc-acm-radio-tx-and-rxHello Everyone, I recently started using NRF52840 dongle, I am trying to combine USB CDC ACM with Radio TX and RX examples. Individually the codes the running without any problem. When I tried combining both I can&#39;t see the COM Port. I want to readen-USTelligent Community 13Mon, 23 Nov 2020 15:11:33 GMThttps://devzone.nordicsemi.com/thread/281372?ContentTypeID=1Mon, 23 Nov 2020 15:11:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f86b7b37-c077-4852-b371-701de6c1aa75ovrebekk<p>Hi&nbsp;</p> <p>Do you mean the receiver and transmitter examples in the examples/peripheral/radio folder, combined with&nbsp;<span>USB CDC ACM?</span></p> <p><span>I wouldn&#39;t recommend using these examples for any serious work,&nbsp;as it is a very simple radio implementation that doesn&#39;t leverage the ability to run the radio in the background while the CPU is busy with other things.&nbsp;</span></p> <p><span>If you just want do to proprietary communication I would suggest using the nrf_esb library instead.&nbsp;</span></p> <p><span>The time sync demo assumes that you are running a SoftDevice, which is why it is using the timeslot API. If you don&#39;t need the SoftDevice&nbsp;then&nbsp;this is not needed,&nbsp;but you can still copy the parts of the code related to sending the time sync beacon.&nbsp;</span></p> <p><span>Best regards<br />Torbjørn</span></p><div style="clear:both;"></div>