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RTL2832U driver?
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I've used an RTL-SDR receiver with a Nexus5X phone, this driver and the SDR Touch app. It works nicely but would consider it for occasional use. The setup eats up the battery rather fast (high CPU usage + the need to power the SDR).
On the plus side, if you have the cable and the SDR with you, it's quite nifty to use it on a whim.
I use an Amazon basics USB 3.0 externally powered hub with a USB 3.0 port on my laptop. I also connect a 6 foot cable to the RTL-SDR. I've had zero issues. As for mobile use, I have the Android made RTL driver from the play store, and a USB C adapter and it works great as well. I use mine with a Google pixel 3. I'm attempting to get it to work on my Chromebook as well.
https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
https://play.google.com/store/apps/details?id=com.mantz_it.rfanalyzer
I assume you're just joking, but something like https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro plus some additional software that connects to it, plus a $20 receiver, would actually allow you to listen to ham transmissions I think.
It uses this driver which is just rtl_tcp and all apps will need rtl_tcp support to work. This method allows use of all commands without Android getting involved.
You need to install SDR driver and then another app, there are a few options but (RF Analyzer)[https://play.google.com/store/apps/details?id=com.mantz_it.rfanalyzer&hl=en_US] works.
If you get one I strongly suggest the RTL-SDR Blog V3 usb dongle and a SMA MALE (opposite of what your baofeng antenna has) antenna for the band you're trying to listen to.
If you want to listen to BNSF/Amtrak a ham 70cm/2m rubber ducky should do alright since at least here in the pnw BNSF is not too far above the 2 meter band.
Likely not enough power or a heat problem. Try running the driver in debug mode, share a pic of any error messages you see. Will it stop working after only starting the driver and nothing else?
Radwave uses the existing RTL2832u driver app: https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
The major differentiator is the interactive waterfall plot. While nearly every SDR program under the sun has a waterfall, Radwave's waterfall has some really handy features that I've never seen elsewhere. Once further through testing, I'll add a video or two demonstrating what these are and how to use them. Thanks for your interest!
Any SDR compatible with https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro will work with Radwave. You Android device just needs USB host mode support, which has become fairly standard, although you'd have to check individual devices to be certain. If you've used any of the other SDR Android apps, then Radwave should work as well.
You could run an android-powered radio and use the android RTLSDR driver in conjunction with any SDR apps (example). That's what I'm doing.
I have a demonstration video here. It requires RF Analyzer and the RTL-SDR driver for Android, both open source applications, and a USB-OTG cable with a phone that supports OTG (most do). Although I use a big E4000 dongle in the video, the "nano" dongle type as NooElec sells is a good mobile fit, and now rtl-sdr.com also sells a small "Stratux" dongle specifically made to conserve power, which could also be good.
Yes, just use this app https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro, and set the IP address with -a to the current IP of the android phone.
If you're on Android with OTG, you can use RTL based dongles with this app; https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro It creates an rtl_tcp server on your phone and can be connected to via GQRX, SDR# etc. Android can also use it via SDRTouch or RF Analyser (both of these can also connect to remote rtl_tcp servers, too).
"RTL2832U driver" It's a separate download in the Play store, but it's from the same author and SDR Touch will link to it: https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
rtl_tcp (and the driver for dongles) is already available here. Might save you some hassle.
Nah, I've built a small handful of projects with an Android phone (rooted with a chroot for SDR software) and using Tasker with the output of many programs (rtl_433, rtl_power, rtl_power_fftw, etc), built a mapping program. You wander around taking signal readings, pin them to GPS and build charts later.
You can even do a lot [without root](https://www.reddit.com/r/RTLSDR/comments/mtef0n/use_dsd_and_librtlsdr_userland_programs_on/]. Or just use RFAnalyser or SDRTouch to detect when pulses get stronger.
RTLSDR rtl_tcp driver needed for most apps that use the dongle.
Apps that only need an audio feed;
DroidRTTY (paid app)
FT8RX (paid app).
If you can root it, you can do a tonne more by running a chroot (Linux userland).
https://www.reddit.com/r/RTLSDR/comments/h0nob4/got_an_upgrade_to_my_android_phonebased_sdr/
Basically got me GQRX and GNURadio running and chroot directly accesses dongle.
https://www.reddit.com/r/RTLSDR/comments/ifer8j/progress_on_the_android_sdr_linuxdeploy_rtl_power/
Integration of it all from output of commands in chroot, through Tasker and to KLWP for live wallpaper information.
There are some rootless tricks, too but need some methods of piping audio
https://www.reddit.com/r/RTLSDR/comments/mtef0n/use_dsd_and_librtlsdr_userland_programs_on/
Of course there are some Android apps (root free)
RTLSDR rtl_tcp driver needed for most apps that use the dongle.
Apps that only need an audio feed;
DroidRTTY (paid app)
FT8RX (paid app).
Okay. The Nesdr Smart XTR is an E4000-based device, which is widely compatible with lots of software but perhaps(?) not quite as widely compatible as RTL-based devices. I bet it'll work with the right software.
It looks like the SDR Driver app you tried isn't really something you'd want to use, it's more of a building block for someone who wants to write their own software that interfaces with SDRs devices.
I would try the SDR Touch or RF Analyzer app and see if you can get one of those to recognize your device.
Search for RTL SDR in the Play Store, there is plenty..
https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
https://play.google.com/store/apps/details?id=marto.androsdr2
You shouldn't need to use RFAnalyzer, there's a rtl_tcp server for Android.
https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
Sorry dunno what trunking is! ;D I live in the third world. Anyways once I tried running my RTL on a cheap & decent tablet, the Chuwi Vi7 It's the first time I was impressed with a cheap chinese tablet! ;D Anyways, I used a small OTG dongle, with RTL stick then installed the RTL android driver, and found some kinda app for listening to Airflight Radio but sadly never gotten around it So, maybe you wanna try this Tablet+RTL+SDR+OTG approach or if your phone is Android, you can use it instead of the tablet.
https://www.youtube.com/watch?v=OrDsPG9s6ZU
seems that guy got good portability with even a better tablet.