Common Problems and Fixes
Resolve issues encountered during installation or while using the I/O mode features of the support package.
Host Not Communicating with ADALM-PLUTO Radio
ADALM-PLUTO radio is not responding to commands or reboots randomly.
See Host USB Port to ADALM-PLUTO Radio Communication Unreliable
Unplug ADALM-PLUTO radio, reboot host computer, plugin ADALM-PLUTO radio, open MATLAB® and at the command line execute:
cd(fullfile(matlab.internal.get3pInstallLocation('libiio.instrset'),'win64','MS64')) system('iio_info -s')
If the host can communicate with the ADALM-PLUTO radio, the radio is ready to use. In this case, you will see an output that lists the radio serial number and USB port information similar to the following:
... Available contexts: 0: 0456:b673 (Analog Devices Inc. PlutoSDR (ADALM-PLUTO)), ... serial=104473222a870010050020009db5d52277 [usb:2.11.5]
If the host cannot communicate with the ADALM-PLUTO radio, replace the radio. In this case, you will see an output similar to the following:If the ADALM-PLUTO radio is malfunctioning, go to https://ez.analog.com/adieducation/university-program at Analog Devices® for support.
... No contexts found.
Host USB Port to ADALM-PLUTO Radio Communication Unreliable
ADALM-PLUTO radio is unresponsive or commands fail especially when the radio is connected to an unpowered USB hub.
Plug in both USB ports on the PlutoSDR. In addition to connecting the USB communication connector port, also connect a dedicated power source to the USB power connector port on the PlutoSDR.
If PlutoSDR is connected to an unpowered USB hub, switch to a powered USB hub.
Try switching to another USB port on your computer.
Input Must Be Complex
The PlutoSDR transmitter input must be complex. This is enforced due to potential for corruption of input signal by the radio hardware IQ imbalance correction when the input transmission signal is real-valued.
Specifically, the problem with receiving a real signal exists if:
PlutoSDR is used in a loopback configurations (LOs for Tx and Rx are locked) and a real signal is transmitted.
Two separate radios are used and the LO frequency offset is less than ~100Hz.
For more information, see Quadrature Tracking.
Specify a complex signal for the transmission.
Overruns or Underruns
The model is not running in real-time.
Follow the examples in Detect Underruns and Overruns.
Try using vector-based processing, as described in MATLAB Performance Improvements.
Firmware Version Warning
When using PlutoSDR with Communications Toolbox™ Support Package for Analog Devices ADALM-Pluto Radio, you see this message:
Warning: ADALM-PLUTO radio with serial number '<serial num>' has firmware version "0.23". The recommended firmware version is "0.26". Click here to start the Hardware Setup App to update radio firmware to the recommended version. To suppress this warning click here.
The support package issues this warning to alert you when the firmware version installed on your PlutoSDR is not recommended for use with the support package release you are running. If the firmware version on the PlutoSDR is older than the recommended version, you must upgrade your firmware. If the firmware version on the PlutoSDR is newer than the recommended version, you can continue using your PlutoSDR without installing the recommended firmware.
MathWorks® has not tested the stability or performance of PlutoSDR devices with firmware versions newer than the recommended firmware version.
Update to the recommended firmware version:
In MATLAB on the HOME tab, select
Manage Add-Onsfrom Add-Ons in the Environment section.
At the right end of the entry for Communications Toolbox Support Package for Analog Devices ADALM-Pluto Radio, click the setup gear button . Clicking the setup gear button opens the Hardware Setup app to update the firmware. Complete the firmware update by following instructions in the app.
Continue using a firmware version that is newer than the recommended version.
When using a newer than recommended firmware version, a warning message is occasionally printed in the command window noting the mismatch between support package and firmware version. The warning can be suppressed by entering the following code at the command line or by adding it to the
startup.mfile where you Specify Startup Options.
Hardware Setup on Windows 7 — Test ADALM-PLUTO Radio Connection Failure
If all these conditions are true:
You have Windows® 7 OS.
Both transmitter and receiver tests fail during the hardware setup process.
You see these errors when you call a Pluto radio object.
rx = sdrrx('Pluto'); rx()
Undefined function or variable 'internal_design_filter'. Error in comm.libiio.AD9361.Filter.info.designDefaultFilter Error in comm.libiio.AD9361.base/setupFIR Error in comm.libiio.AD9361.base/initDevice Error in comm.libiio.AD9361.Rx/setupImpl
Run the installer as administrator. Exit the installer and MATLAB. Start MATLAB as administrator and start the installer again. To run as administrator, right-mouse click the MATLAB icon and select Run as administrator.
Hardware Setup on Linux — Configure ADALM-PLUTO Radio Failure
Failure during configuration of ADALM-PLUTO radio on Linux® caused by inability to change the frequency band via the serial port. On certain Linux distributions, such as Ubuntu®, you are not able to communicate with the radio via the serial port to configure the frequency band.
Use ssh to configure the frequency band, as follows:
Determine the IP address assign for the radio. The factory default IP address is
192.168.2.1. Confirm the radio IP address by viewing the
info.htmlfile found in the PlutoSDR folder. The radio appears as a USB drive named PlutoSDR when the radio is connected to the host computer.
At the Linux command prompt, enter the following commands (update the IP address to match the one determined in the prior step):
The authenticity of host '192.168.2.1 (192.168.2.1)' can't be established. ECDSA key fingerprint is SHA256:MrvRV5EM7cdUe2bP0Vt2r4OQ5LKBc3PG08BGYMklblA. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.2.1' (ECDSA) to the list of known hosts. email@example.com's password: [ Enter "analog" as password ]
Welcome to: ______ _ _ _________________ | ___ \ | | | / ___| _ \ ___ \ | |_/ / |_ _| |_ ___ \ `--.| | | | |_/ / | __/| | | | | __/ _ \ `--. \ | | | / | | | | |_| | || (_) /\__/ / |/ /| |\ \ \_| |_|\__,_|\__\___/\____/|___/ \_| \_| http://wiki.analog.com/university/tools/plutoThe radio reboots and you can close ssh.
fw_setenv attr_name compatible fw_setenv attr_val "ad9364" pluto_reboot reset
Unable to Assign IP Address Radio Identity
MATLAB returns an error when you attempt to assign an IP address
tx = sdrdev('Pluto', 'RadioID', 'ip:192.168.2.4');
If you cannot successfully assign an IP address
RadioID, and you
are using Linux, these additional steps are required to configure and identify the
ADALM-PLUTO radio via IP address:
To determine the IP and MAC addresses assigned the host computer and the IP address assigned to the ADALM-PLUTO radio, look in
info.html. For example, use the command:
grep -A 1 'IP Address (\|MAC Address (HOST)' /media/PlutoSDR*/info.html
Determine the Ethernet port assigned to the HW address. For example, use the command:
ifconfig -a | grep eth[0-9]
Map the IP address to the associated Ethernet port based on the HW address associated with host computer. For example, if the Ethernet port is
eth9and the IP address is
192.168.2.10use the command:
sudo ifconfig eth9 192.168.2.10
Attempt communicating with the ADALM-PLUTO radio, For example, if the ADALM-PLUTO radio IP address is
192.168.2.1use the command:
ping -c 3 192.168.2.1
ADALM-PLUTO Radio Is Busy
MATLAB returns this warning message from a call to the
## Establishing connection to hardware. This process can take ## several seconds. Warning: Cannot create a driver for the specified address. The address 'ip: 192.168.2.1' is already owned by a block, block dialog, or System object. Stop the simulation, close the open dialog, or call the release method of the System object to allow a new owner to be assigned.
This message means that the radio hardware is in use by another MATLAB or Simulink® session. ADALM-PLUTO radios can become busy when any of the following conditions occur:
A Simulink simulation is in progress.
A receiver or transmitter block is open.
A locked receiver or transmitter System object™ is in memory.
Release the radio hardware by stopping the simulation, closing the block, or calling
release method of the System object.
No Data from Hardware
You are not receiving data from the radio hardware after streaming starts.
Reestablish Connection. If you do not have a connection, it is possible that a radio identity conflict, a bad cable, or a loss of power is causing the problem. To reestablish connectivity:
Check the cables and power.
To make sure that you have a basic connection, refer to Manual Host-Radio Hardware Setup.
If you cannot establish communication with the host, check your radio hardware for faulty connections or defects.
Synchronize Software and Radio Hardware
For a radio object: Use the
For a receiver block: Open the block mask and click Info.
For a receiver System object: Use the