You need to install RTL-SDR demod in safe mode. Otherwise, it will cause problems with the USB ports. To fix this problem, install RTL-SDR in safe mode using the correct Visual C++ version. Once you have installed it in safe mode, you should be able to run SDR# and monitor your signal in real-time.
MATLAB
If you are getting the error ‘MATLAB rtl sddr demod write_reg failed’, it is most likely that your SDR isn’t recognized by your computer. In this case, you can try replacing the dongle or manually configuring it.
First, you should check if the USB connection between your computer and the SDR dongle is stable. If it doesn’t, try using an extension cable. A low-quality USB cable might not work with your computer. Alternatively, rebooting in safe mode can also fix the issue.
SDR#
If you run into the error message, “RTL-SDR demod write_reg failed with error code 0x81,” it’s likely that your USB port is broken. You can solve the problem by repairing your USB port.
If your USB port is working, try installing RTL-SDR in safe mode. Alternatively, you can replace the SDR dongle with another one. To do this, you must run the command “rtl sdr demod lsmod”.
In addition to RTL-SDR demod, you can also install a demodulator for your RTL-SDR dongle. The packages are available on jessie-backports. In case your RTL-SDR dongle is not supported by this kernel module, you should install an appropriate DLL to enable it. Then, you must reboot your computer.
To install RTL-SDR on a Mac or Windows computer, install the latest version of Communications Toolbox. You must also install the support package and enable the corresponding USB drivers in your system. When the installation is complete, run “rtl sdr demod” in a command-line shell. After installing the RTL-SDR software, you can configure multiple radios to receive data from multiple sources.
RTL-SDR
If the error “RTL-SDR demod write-reg failed with error 0x000003F” keeps showing up, you may be experiencing a USB 3.0 port problem. This issue can be caused by a USB 3.0 port that is underpowered, a low-quality USB extension cable, or a faulty dongle. You can try installing the RTL-SDR again in safe mode to check for a faulty USB 3.0 port.
If this issue persists, try repairing the USB port. In some cases, the problem can be caused by other applications using the RTL-SDR. You can also try installing it in safe mode by running the installation program in Windows safe mode. To install RTL-SDR, make sure to use the correct version of Visual C++.
Ensure that the RTL-SDR is plugged into a USB port that is open on the computer. You can check this by viewing the information about the radio. You should also try connecting the RTL-SDR to other computers or different USB ports.
RTL-SDR dongle
If you receive the error message “RTL-SDR dongle write-reg failure with error -9” while trying to set up the dongle, the most likely cause is a problem with your USB port. To fix the problem, try installing the dongle in safe mode with the appropriate version of Visual C++.
If you can’t get this error fixed by the automatic method, you can manually configure it. You can also replace it. Typically, you can use a different dongle or get a new one. Then, simply reconnect the dongle. This will solve the problem.
Another common cause of the RTL-SDR dongle write-registration failure is a broken dongle. The dongle will not function properly until the firmware is updated. This can take hours to do. If you’re having trouble figuring out the cause, check the documentation that came with the dongle. Make sure you have the correct firmware version for the dongle and your radio.