Newby here. This is my first Kraken with desire to purchase 4 more and link them together across the city to locate transmitters quickly.
SDR connected to PI 4 via USB
Hotspot on Android Phone is configured
PI 4 connected to Hotspot
Android Phone can access PI 4 webpage: IP_ADDR:8080
On Android Phone, in Browser, at IP_ADDR:8080, in the box for DAQ Subsystem Status, Connection Status = DISCONNECTED
Why? What am I missing?
I got it to work one time. After rebooting PI 4, it won’t connect again. I tried different power supplies and three different USB cables from the SDR to the PI 4. Is there a certain boot order? Waiting time between powering the SDR and the PI 4?
There’s no boot order. Just wait until the KrakenSDR software comes online. The first time it could take a few minutes because there is not numba cache yet.
If it’s saying disconnected, you might just need to wait a few more minutes for it to come up.
If it’s been a long time try rebooting by power cycling.
If it never connects please go through the troubleshooting steps in the wiki 07. KrakenSDR Troubleshooting · krakenrf/krakensdr_docs Wiki · GitHub
HI, I am also a newbie with one krakensdr connected to a linux laptop running ubuntu 22.04 via usb cable
i installed the virtual machine after downloading the same from mega link.
i have installed the usb 3 extension for the virtual box and passed the device that is being created when i plug in the krakensdr
below is the output of lsusb -v for the particular hardware getting detected
update: i have install the rtl sdr drivers for linux on the host machine now i have following output of lsusb from the host machine
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 30c9:0035 Luxvisions Innotech Limited HP TrueVision HD Camera
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0bda:2852 Realtek Semiconductor Corp. Bluetooth Radio
Bus 001 Device 010: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 009: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 008: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 011: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 004: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 002: ID 0424:2517 Microchip Technology, Inc. (formerly SMSC) Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
i have passed on the usb device to the vm also but only two usb are getting passed on .
the kraken radio isnt getting detected by the doa server on the vm, please help me out to fix the issue
just did update the config on vm now only one port is getting passed to the vm
Kindly advise what am i doing in correctly
appreciate your help
Hmm so only one devices is getting passed through into the VM. But definitely all devices are there on the host machine.
It could be that the host machine is ‘stealing’ the devices and thinking that they are TV tuners, thus not allowing them to connect to the VM.
When you installed the drivers on the host machine did you blacklist the DVB TV drivers with the command on the host machine:
echo 'blacklist dvb_usb_rtl28xxu' | sudo tee --append /etc/modprobe.d/blacklist-dvb_usb_rtl28xxu.conf
Dear Carl
thanks for reverting, yes the same was done on the host machine and now the lsusb output of the host is as below
navneet@bl2:~/krakensdr_doa$ sudo lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 30c9:0035 Luxvisions Innotech Limited HP TrueVision HD Camera
Bus 003 Device 007: ID 0424:2517 Microchip Technology, Inc. (formerly SMSC) Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0bda:2852 Realtek Semiconductor Corp. Bluetooth Radio
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
and lsusb of guest is
krakenrf@krakenrf:~$ sudo lsusb
[sudo] password for krakenrf:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
the kraken_test says no supported devices found.
kindly advise if the above detects are correct andnothing has been missed out by me
so kraken_test shows no devices on either host and VM?
Seems more like a USB connection or power supply issue in that case. What power supply are you using?
Can you confirm that you have a high quality USB data cable?
i am using 5v from a 900w smps on which max current output is 36A.
yes the cable is a high grade usb c to A with a usb c to usb A convertor
i have just change and plugged the same to USB C port of the laptop and the RTL have start to show up and also the power usb cable wasnt rated for higher current so changed that too.
Case Closed 
