When using the RTL-SDR dongle on an Android device, without the temperature-compensated crystal oscillator, I need to manually adjust the frequency. The app I'm using doesn't support frequency adjustment. However, I noticed that the RTL-SDR driver interface has a command bar for `sdr_tcp`, so I thought I could directly enter commands into it. But this program seems not to fully follow the original version's `sdr_tcp` command. When I entered `-c`, it didn't work. Could an experienced user please help me solve this problem?