Q&A - Recent Threads

Voyager 4 - COM communication drops after continuous CSV data logging

sandrac — Fri, 31 Oct 2025 10:47:56 GMT

Hello,
I’m using the Voyager 4 device for communication over USB. When I continuously collect and save data to .csv files, after some time the communication over the COM port stops responding.

The issue looks like this:

The program runs correctly for a while (data logging works fine).
After some time, the COM communication drops.
Reconnecting the USB cable restores communication, but my application terminates unexpectedly due to the COM port disconnect.
I have tried using different USB cables and ports, but the issue still persists.

Has anyone else experienced this issue with Voyager 4 when continuously logging data over USB? Is there a known firmware update or workaround for maintaining stable COM communication over long sessions? Are there any recommended timeouts, buffer limits, or flow control settings for this device?
Thank you in advance for your help.

Strange behaviour of Accelerometer values in CN0549 Condition Based Monitoring-Platform

RobWoody — Fri, 16 May 2025 12:44:40 GMT

I got this setup CN0540 and the CoraZ7-07s [Analog Devices Wiki] getting to work. When i started with this setup, i first used the IIO Oscilloscope Software to get a quick view on the data/FFT because i was interested. I installed the App phyphox on my iPhone and generated a 2 kHz and a 4 kHz signal and held it next to the sensor. In the FFT i saw a peak at 2 and 4 kHz. So everything was looking fine. I then started to create a python script that gets the data from the sensor. I also got this to work. The only problem I have is that I get strange values from the sensor. I leave the sensor on the table while measuring and read out the values. In my Python script I set the rx_output_type to “raw”. In my opinion, I should only get values in a constant area when the sensor is at rest. However, if I carry out measurements at two different times, I get different values. For example, one day the values fluctuate between -300 and -700, the next day the values suddenly fluctuate between -2158100 and -215600. I have no idea why the values vary so much although I have not changed anything in the hard- or software. Do you guys have any idea why the values are behaving like this or how to investigate on this? I then tried the IIO Oscilloscope again and to my surprise, i wasn't able to recreate the 2 and 4 kHz example. When i hold the iPhone next to the sensor, i can't see a peak anywhere. Why is that and could this have the same cause as the strange values?

LTM4644IY#PBF internal framework issues

apple6868188 — Fri, 28 Feb 2025 03:42:10 GMT

We have received your products many times, but the internal X-RAY sequence frames are different. For example, LTM4644IY#PBF is shown in the following figure. Please help us to see what causes this situation, thanks a lot.

Saving multiple data records from CN0549 to memory (i.e. inserted SD-Card) or streaming data to python

RobWoody — Thu, 06 Feb 2025 16:22:33 GMT

I bought the reference design CN0549 with the CoraZ7 board, CN0540 and the CN0532. I have the ADI IIO Oscilloscope software running on my Windows computer and can visualize the oscillation data. However, when I save the data, only a single data set is saved in the CSV file. How can I ensure that not just one but several data records are saved in the CSV file? Is this even possible or do I have to use additional software (Python, for example, as I don't have Matlab) to access and save the data?

Enabling Activity interupt

AD11 — Mon, 07 Oct 2024 13:34:40 GMT

Hello,
I am trying to enable activity interrupt and i think i am having some issues:
1- i think there has to be some ordering for registers as if i change ordering of registers i see settings are applied otherwise it's not.
2- Even after configuration taking effect and reading register and i can see activity interrupt is enable. I still don't receive any interrupt from sensor on motion but when it's not moving i can see some dummy interrupts triggered! No matter what threshold i use.

3 - Is activity interrupt is enabled only in measurements mode? As i was looking forward to use it in low power mode.

Thanks in advance

Voyager 3 sensor board connector pinout ?

cambridgedev — Fri, 14 Jun 2024 13:28:36 GMT

Hi,

I'm evaluating the ADXL356 in the Voyager module. I need to interface directly with the ADCs on the sensor board using the SPI port.

Where can I find the pinout for the flex connector on the Voyager sensor board ?

Thanks.

Help streaming data from Cn0549 and Cora Z7 to Matlab.

Besim — Fri, 15 Dec 2023 09:58:20 GMT

Dear CbM community,

I'm trying to stream data from the Cn0549 and Cora Z7 to matlab, following the advice from https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0549/matlab_example , I've installed the libiio 0.25 .exe file from https://github.com/analogdevicesinc/libiio/releases/tag/v0.25 (I don't know if that is what is meant to be installed so advice would be much appreciated) but when I go to run the code provided from the first link on Matlab I get the following error

Error using adi.CN0532
Method 'releaseChanBuffers' in class 'adi.common.RxTx' uses different access
permissions than its superclass 'matlabshared.libiio.base'. Set 'releaseChanBuffers'
access list to match superclass access list.

I do apologise If I've become annoying with these questions, but I come from a mechanical engineering background and I am not very familiar with these types of problems.

thanks in advance.

Can't pull out the inet address of eth0; Cn0459 and Cora Z7

Besim — Sun, 10 Dec 2023 00:51:45 GMT

Hello everyone, I am trying to connect with my CN0540 and Cora Z7 as described in the guide (https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0540/coraz7s); but when I open a session and write ifconfig in the terminal in order to get the device ip, I don't get an ip as described on the guide, see attached image. Thanks in advance.

p.s. Sorry if the question is not worded correctly, English is not my first language

Reading time domain data from CN 0540 through an arduino?

Besim — Sat, 01 Jul 2023 14:53:49 GMT

Dear CbM Group,

Recently I acquired two EVAL CN0540 ARDZ Shields and two EVAL CN0532 EBZ sensors, for a predictive maintenance project I'm working on, seeing that I have a couple of Arduino Unos Lying around can I use them to read data form the DAQ shield, so from which arduino pin can I read time domain unprocessed data ( processing to be done later in Matlab's diagnostic feature designer App), and how do I need to configure the other pins to provide the required info from arduino to the DAQ shield.

Any book or video recommendation that can help me solve this problem would be greatly appreciated.

With respect,

CN0549

Besim — Wed, 31 May 2023 00:08:57 GMT

Dear CbM Group,

I'm writing to you to enquire about the CN0549 Condition-Based Monitoring Development Platform, I'm a student and for my masters thesis I'm trying to do something about Predictive Maintenance using the CN0549 Condition-Based Monitoring Development Platform.

Seeing that I only want the CN0549 board to record data, and then use software like Matlab to process the data,

My question is: Do I need to also buy the DE10-Nano FPGA Board or can I connect the Data Acquisition Board directly to my PC.

With Respect,

Digital Measuring Tools

ADIApproved — Wed, 03 May 2023 05:07:36 GMT

Hello, I would like to inquire if Analog Devices has digital measuring devices that can measure the following:

Airflow rate
Static pressure
Dry and wet temperature
Relative humidity

It does not need to be only 1 product for all parameters.

Read the output of both EVAL-ADAF1080-3EBZ and CN0532

zhang132 — Tue, 04 Apr 2023 01:58:30 GMT

To whom it may concerned,

I am trying to do some stuff about motor condition monitoring with both CN0549 as well as EVAL-ADAF1080-3EBZ.

I have already get the FFT result of the EVAL-CN0532-EBZ on my PC by python with the tutortial

(Streaming Data from the CN0549 into Python Tools [Analog Devices Wiki])

and the hardware is set up as (CN0549 User Guide [Analog Devices Wiki])

, however, I would also like to get the value of the current sensor at the same time.

I think i can just connect the Vout pin of the EVAL-ADAF1080-3EBZ to the DE10-Nano Analog input pin,

but I found out that the adi library does not support the ADAF1080, and I am wondering how could i solve this.

Thanks.

CN0540 + Arduino Or CN0540 + DE10-Nano FPGA, what should I use ?

JAAFARA1M — Mon, 27 Feb 2023 10:28:15 GMT

Hello everyone,

I bought your product, the EVAL-CN0540-ARDZ, and I saw on your website " https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0540 "that this card ( CN0540 ) can be powered by an Arduino Uno and I've tried so long time to communicate between the two but I didn’t get any results, on the other hand, I see that you've linked a device driver which is for the ADC " AD7768-1 ",Linux driver, so now I am wondering how can I use this driver and I am using an Arduino ???

Again, on your website you mentioned

Software Projects and Platforms

but you didn't give an example for using an Arduino with the CN0540, or any Arduino code to communicate between the CN0540 and the Arduino ????

So, should I forget about using an Arduino and get a DE10-Nano FPGA or what ?

Please I am waiting for your answer, Thank you.

CN0532 long term operating temperature

FelipeCook — Tue, 14 Feb 2023 02:35:05 GMT

Hi,

One of the equipment for which we want to monitor vibration has a surface temperature of 90 to 110 degree Celsius. These conditions are during 10 hour shifts, 6 days a week.

Is the CN0532 capable for the job? The datasheet says maximum operating temperature 125 degrees, but it doesn't say anything about long term reliability at high temperatures.

Regards,

What device that is used to connect the industrial accelerometer to computer?

Noodleaddict77 — Tue, 24 Jan 2023 17:07:51 GMT

Hello everyone,

I am quite new using accelerometer. I would like to get the signal from industrial MEMS accelerometer (1-axis) and do the signal analysis in my pc.

I know only that I can connect ADXL345 accelerometer to arduino board, then connect to pc. However, for industrial accelerometer is quite different.

I am not sure which device I have to interface with accelerometer before connecting to my pc.

I would be appreciate if someone can help me out.

Thank you!

Can I use ADXL345 to measure vibration of machine structure?

Noodleaddict77 — Thu, 05 Jan 2023 18:19:01 GMT

Hello everyone,

I am quite new here. I would like to know if I can use accelerometer ADXL345 to measure the vibration of conveyor? The maximum range of ADXL345 is +/-16g which I am not sure if it would be enough to measure the vibration.

Maximizing vibration data sampling rate from ADXL357 for condition monitoring application

Parminder — Wed, 20 Jul 2022 12:43:52 GMT

Hi there !!

I am building a vibration monitoring application using ADXL357 with esp32 microcontroller. As per the information provided in cbm setup guide by ADI the number of datapoints collected in a second should be 5khz for 2.4 khz bandwidth.

I have set the ODR_LPF at 2000 Hz and 500 Hz and HPF_CORNER at 6.2084 × 10−4 × ODR. and esp32 baud rate at 115200 through I2C.

Problem:

I am getting 350 - 410 samples of vibration data in a second when I run a count to calculate the no of samples/sec.

Question

How can I get 5000 data samples/ sec ?

Is my way of measuring the sampling data rate using a counter correct?

Kindly provide me some guidance in the right direction.

Thanks.

ADXL326 frequency response drop seriously

fen1985 — Thu, 16 Jun 2022 06:14:31 GMT

Hi ADI guys，

We test ADXL326 recently as our new project application for low-frequency vibration ，and find there is some frequency response problem，

We test X axis ,when the frequency exceed 500HZ, the acceleration magnitude drop seriously, as below:

frequency(Hz)	Acceleration
50	130
100	130
400	130
700	118
1000	2.8
1300	2.46

The actual bandwidth is much lower than 1.6KHz from the spec,How can we improve the ADXL326 BW? We set the the Cout of the RC filter about 3nf .

Thanks a lot!

Can anyone suggest similar features MEMS sensor for the attached conventional accelerometer datasheet?

settisuresh — Mon, 25 Apr 2022 13:01:17 GMT

ez.analog.com/.../Type-8765A250M5_5F00_datasheet.pdf

could you please suggest a MEMS sensor accelerometer, where the features are similar to the attached surface mount conventional accelerometer? Any type of suggestions are appreciated

Thanking you!

How to convert Accelerometer data from ADXL375 into Velocity for condition monitoring?

shreeneet — Sat, 26 Mar 2022 06:01:47 GMT

We are building a 0 to 1600Hz Bandwidth Vibration signal analysis system using ADXL372, ADXL375 & ADXL 357 based on budget. We will perform FFT of these values on dsPIC33xx

Our frequency of interest is 30Hz to 240Hz, and would like to know if:

We should monitor Velocity instead of Acceleration for these frequency range
How do we convert the acceleration data into reliable velocity data at Sampling rates of more than 6400 samples per axis?
Any suggestions/guides for onboard FFT on dsPIC33 (100MIPS) MCU with 32kb SRAM
Any resource for us to gain more insights on above two points would be helpful

All the inputs appreciated! Thank you in advance.

ADXl345 - number of Samples for ODR - 3200

Dig_acc — Fri, 07 Jan 2022 11:12:40 GMT

Dear Sir/Madam,

This is Srinivasa Rao Beera , working with Akrivia Automation. We are working on motor health monitoring project and we have selected ADXL345 . We are using 3200 Hz as output data rate. When we monitor output data samples from adxl345 , it is not exactly nearby 3200 number of samples.

For example if we take 3 Nos adxl345 sensors, all three are not giving same number of samples .

First sensor is giving 3180 samples

Second sensor is giving 3260 samples

Third sensor is giving 3300 samples.

How can we get all sensors are in same page ? Atleast 3200 samples +/- 5 samples in all the sensors. We have purchased 300 Nos sensor , so please help in this regard.

ADcmXL3021 RTS Mode status field

rtstasur925 — Fri, 05 Nov 2021 10:08:40 GMT

Hello,

I would like to know what the Status field each bit represent when the ADcmXL3021 is set to RTS Mode.
because I didn't notice any discribtions about this subject in the datasheet.
PS.My ADcmXL3021 Date Codes is 1937.

How to get the frequency to calculate the vibration value

sng.jarvis — Sat, 09 Oct 2021 06:26:39 GMT

Dear All,

I have the following queries to develop the MEMS Accelerometer to measure the vibration value in velocity (mm/sec)

1. If i am using ADXL335 or ADXL1002 means whether the frequency signal can be calculated by the sensor itself or external frequency needs to be given?

2. If the frequency signal needs to be given externally then how to interface the signal with these sensors?

Failed to update Load Kernel Modules: Conditional based monitoring (CN0549

PreethamJayaram — Fri, 01 Oct 2021 12:45:48 GMT

Hello, I am using CN0549 conditional based monitoring platform with the CoraZ7-07s board. I’ve been having issues with booting ADI Kuiper Image on to the system.

I have been getting errors like “Failed to update Load Kernel Modules”.

I’ve been following the procedure and softwares provided by Analog devices official user guide for the CBM platform (The link below).

https://wiki.analog.com/resources/eval/user-guides/circuits-from-the-lab/cn0540/coraz7s

I even tried with the older versions of image from ADI but had the same issue. Please let me know what can be done to get over this issue.

The screenshot of the error during the boot sequence is attached below.

Thank you.

CN0549

NKokubo131 — Mon, 27 Sep 2021 09:34:30 GMT

I am FAE in Japanese distributor.

My customer evaluate CN0549(CN0540+CN0532) now.

Could you tell me how many g per LSB?

Best regards

N.Kokubo