https://github.com/SiliconLabs/bluetooth_stack_features/blob/2b9516f4c99aed59ad72df04d522b99fa2f46fc8/system_and_performance/waking_from_deep_sleep_using_rfsense/src/tx_side/app_process.c#L198 `CHANNEL` is not defined anywhere and so the build fails. (Target EFR32BG1P232F256GM48, Gecko SDK Suite v4.4.0)