Hi @Necromant, thank you for your comments regarding the RPD feature of the nRF24+. I have done some experiments with it. The result is a new tool TrafficDetectorRF24, which is available in my MySensors.Tools repository. The tool scans a single channel and outputs the current status via a debug pin. This can be used to connect a LED or better an input of a logic analyser. At first I tried to use the RPD feature based on the MySensors example PassiveNode. Unfortunately, that didn't work at all for me. I then adapted the code from Rolf Henkel Poor Man's Wireless 2.4GHz Scanner for my purposes. The detector works quite accurately (resolution approx. 140us) so that you can usually detect the transmitted telegram and the ACK response of the receiver individually: [image: 1615674196199-2021-03-13-23_16_23-clipboard.png] I hope you have more success in your attempts with the RPD feature.

At "https://www.mysensors.org/download/contributing#coding-guidelines-core-library", under "Signing CLA", the link to clahub.com is since long dead. Maybe you can follow this example: https://github.com/chocolatey/choco/issues/2036 and replace with https://cla-assistant.io/ ?