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    Error on Raspberry PI 4 while opening TensorFlow.

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    • S
      sreu13 last edited by salmanfaris

      Hi,
      I came by this error after installing TensorFlow in RPI 4
      can you guys find a fix?
      error on Raspberry PI 4

      tensorflow/core/platform/hadoop/hadoop_file_system.cc:132] HadoopFileSystem load error: libhdfs.so: cannot open shared object file: No such file or directory)
      

      1.JPG 3.JPG 2.JPG

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      • A
        arunksoman last edited by

        Your are using a bleeding edge python software for tensorflow. I believes it is python 3.7 or python 3.8 or something. Try to downgrade your python to 3.6.5 or other compatible version by refereing documentation.

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        • S
          sreu13 @arunksoman last edited by

          @arunksoman hi, i've run this code using python 3.7 on anaconda and it worked fine.
          but as i run this on RPI 4, it showed the Hadoop error. I then updated the libraries and Hadoop error was solved..
          now there is a new error
          2020-03-30 (1).png 2020-03-30 (2).png

          also can you take a look in the 10% memory error?...like what can be possibly done there??

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          • A
            arunksoman @sreu13 last edited by

            @sreu13 What is the version of tensorflow you are using? Did you read the tensorflow docs? You can't do simply
            pip install tensorflow
            for Python 3.7 version.

            S 2 Replies Last reply Reply Quote 0
            • S
              sreu13 @arunksoman last edited by

              @arunksoman i installed tensorflow from the below given link

              and i installed it without entering into virtual environment

              but this 10% memory issue is a serious pain

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              • S
                sreu13 @arunksoman last edited by

                @arunksoman tensorflow 2.0.0 version had been installed

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                • A
                  arunksoman @sreu13 last edited by arunksoman

                  @sreu13
                  Ensure that you are installed tensorflow 1.x since screenshot of your code shows something like
                  from keras.layers.convolution import covolution2D
                  It is not correct in case for tensorflow 2.0 since keras api is part of tensorflow itself.

                  Another thing is try to expand your file system. It should be do with your own risk.

                  1. sudo raspi-config
                  2. Navigate to Advanced options
                  3. Select advanced options and hit enter(I believes tab key is useful here)
                  4. Choose Expand File System and hit enter finish.
                  5. Then your pi may prompt to reboot. If it didn't run. Execute
                    sudo reboot
                  6. Then execute following commands one by one:
                  $ sudo apt-get purge wolfram-engine
                  $ sudo apt-get purge libreoffice*
                  $ sudo apt-get clean
                  $ sudo apt-get autoremove
                  
                  1. Then increase swap memory by editing following file swapfile:
                    $ sudo nano /etc/dphys-swapfile
                  2. It will open nano editor. Navigate to variable
                  CONF_SWAPSIZE=100
                  

                  It indicates your current swap is only 100mb.
                  So you just have to increase by commenting down this line and increase to appropriate value something like shown below for 2GB swap:

                  #CONF_SWAPSIZE=100
                  CONF_SWAPSIZE=2048
                  
                  1. Save the file and exit nano editor.
                  2. sudo reboot

                  I believes if it did not helped you, you have to think about MOVIDIUS or NVIDIA Jetson nano etc.

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                  • S
                    sreu13 @arunksoman last edited by

                    @arunksoman i'll try this method, but while executing swap command, will the rasbian os and the files it contains be effected??

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                    • A
                      arunksoman @sreu13 last edited by

                      @sreu13 I edited comment please read that again. Most probably it will not effect your file system. In some scenarios it can create worse effect.

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                      • S
                        sreu13 @arunksoman last edited by

                        @arunksoman hi,..
                        actually at this point of time, I'm not willing to risk RPI4,....i thought of connecting the rpi4 to google cloud (already have an account with $300 credit) and proceeding with the code.
                        but i do not know if the below process can be executed

                        1. sending image from rpi4 to cloud
                        2. using this cloud for running prediction
                        3. the above two processes should be automated and image should be sent to cloud when pi boots up(VM engine can be activated whenever nessesary)

                        is this possible?

                        A 1 Reply Last reply Reply Quote 0
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                        • Hi team,

                          Any one have experience in Altium schematic designing.
                          I am facing some issue in Hierarchy->harness in Schematic.
                          The offpage number for harness is not showing, and while generation the smart PDF if we click the harness port /green box the page want to go there automatically, but that also not working.

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                        • D

                          @salmanfaris thank you so much man, I'll try this and update you shortly. Thank you once again.

                          Best,
                          Dipu

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                        • Hi @dipu_varghese ,

                          Here is the sample input from the binary edge impulse inference,

                          Predictions (DSP: 16 ms., Classification: 1 ms., Anomaly: 2 ms.): idle: 0.91016 snake: 0.08203 updown: 0.00391 wave: 0.00391 anomaly score: -0.067”

                          And from here for example we can try to get the updown values only by attaching the device to another controller and read the Serial string directly.

                          void setup() { // Start serial communication at 9600 baud Serial.begin(9600); } void loop() { // Wait until there is data available on the serial port while (!Serial.available()) { // Do nothing } // Read the input string from the serial port String inputString = Serial.readStringUntil('\n'); // Find the position of the "updown" value in the input string int updownPos = inputString.indexOf("updown:"); // If the "updown" value was found in the input string if (updownPos >= 0) { // Extract the "updown" value from the input string String updownString = inputString.substring(updownPos + 8, inputString.indexOf('\n', updownPos)); // Convert the "updown" value to a float float updownValue = updownString.toFloat(); // Output the "updown" value Serial.println(updownValue); } }

                          The sketch should then output the "updown" value, which is 0.08203.

                          Hope this will be helpful, let me know if you need more clarification.

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                        • D

                          @salmanfaris any updates?

                          Best,
                          Dipu

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                        • D

                          @salmanfaris Hope you're doing well, did you get sometime to work on this?

                          Best,
                          Dipu

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