@toolelucidator The github repo should have everything, so just running the commands to build with Docker are enough.
Hi I am trying to do the build with spyder python , but I get the error ââcmakeâ is not recognized as an internal or external command, operable program or batch file.â. Any help would be appreciated.
Hi @wlonsdale129,
You need to install cmake in order to build locally (https://github.com/edgeimpulse/voice-activated-microbit#how-to-build-local). You can also use the docker version instead as the toolchain is already included in the image.
Aurelien
1 Like
This looks like it is not using the proper compiler⌠Do you have arm-none-eabi-gcc and arm-none-eabi-g++ in your PATH and are these version 9?
Bringing ML to micro:bit is just awesome! Well done also for this fantastic UI.
From Terminal (MacBook Pro M1): python build.py generated errors.
(I have loaded Cmake and gcc-arm-none-eabi-9-2020-q2-update and added them in the PATH)
See attached.
Your help would be very much appreciated, thank you!
Hello @AAAAA5,
I do not have an apple M1 to try the build.
As a workaround, could you try compiling with Docker see if it works please?
Regards,
Louis
@AAAAA5 Bit late (sorry!) but this does not look like itâs using the stdlib in ARM GCC. If you run arm-none-eabi-gcc does this work?
Hi,
I works great with your example but when I want to use my model with another word âleftâ instead of âmicro:bitâ I got the build error below. Do you have any idea ? Thanks, Julien
C:/Users/juphu/voice-activated-microbit/source/edge-impulse-sdk/CMSIS/NN/Source/PoolingFunctions/arm_max_pool_s8_opt.c:156:22: warning: unused variable âinâ [-Wunused-variable]
156 | union arm_nnword in;
| ^~
[2/89] Building CXX object CMakeFiles/MICROBIT.dir/source/edge-impulse-sdk/tensorflow/lite/micro/kernels/cast.cc.obj
[3/89] Building CXX object CMakeFiles/MICROBIT.dir/source/edge-impulse-sdk/tensorflow/lite/micro/kernels/batch_to_space_nd.cc.obj
[4/89] Building CXX object CMakeFiles/MICROBIT.dir/source/edge-impulse-sdk/tensorflow/lite/core/api/op_resolver.cc.obj
[5/89] Building CXX object CMakeFiles/MICROBIT.dir/source/edge-impulse-sdk/tensorflow/lite/micro/kernels/add.cc.obj
[6/89] Building CXX object CMakeFiles/MICROBIT.dir/source/edge-impulse-sdk/tensorflow/lite/core/api/flatbuffer_conversions.cc.obj
ninja: build stopped: subcommand failed.
juphu@DESKTOP-S65DAO8 MINGW64 ~/voice-activated-microbit (master)
Hi @Juph, did you change to your keyword here? https://github.com/edgeimpulse/voice-activated-microbit/blob/master/source/MicrophoneInferenceTest.cpp#L32
And replace the edge-impulse-sdk, tflite-model, and model-parameters directories in source with your C++ library export as well?
hello! thanks for the awesome tutorial. Am wondering why the window size is 999ms instead of 1000ms? It was mentioned that itâs got something to do with the 11kHz frequency, but what exactly?
Hello @warp-speed
Indeed, this was not 100% clear to me either, I had to ask @janjongboom too 
So basically when you sample at a 11kHz frequency, you have 11000 samples in one second (or 1000 ms).
So if you do 1000/11000 = 0.090909
But back in the time, we used some rounded values in the studio so 0.090909 * 11000 ~= 999.9âŚ
However, now we use zero padding it does not matter anymore.
I hope this is clear.
Regards,
Louis
Thatâs clear, thanks a bunch louis and jan
Another thing is that you no longer need to downsample your audio files to 11000Hz yourself. You can now just upload any type of audio, and select 11000Hz in the Create impulse screen 
Will put that in the repo.
Hi Jenny and All,
I try to build the original project download from Gitbub and facing to this error. Could someone hep me please ? THANKS
Utilisateur@PCMICRO-NVVPKDJ MINGW64 ~/voice-activated-microbit (master)
$ python build.py
codal-microbit-v2 is already installed
Set target: codal-microbit-v2
Using target.json (dev version)
Targeting codal-microbit-v2
CMake Error: CMake was unable to find a build program corresponding to âNinjaâ. CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool.
â Configuring incomplete, errors occurred!
See also âC:/Users/Utilisateur/voice-activated-microbit/build/CMakeFiles/CMakeOutput.logâ.
I downloaded the missing ninja, the build works but fails a bit later in the process:
c:/progra~2/gnuarm~1/92020-~1/bin/âŚ/lib/gcc/arm-none-eabi/9.3.1/âŚ/âŚ/âŚ/âŚ/arm-none-eabi/bin/ld.exe: cannot find -ladvapi32
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
Hi Jenny and All,
Iâm able to generate the hex file by keeping the same key word microbit for the exercice, in despite of the good accuracy 94% the voice recognition doesnât work, micro:bit doesnât recognize the word âmicrobitâ! Any idea please ? Thanks
Have you cloned the project to your own account and added recordings of your own voice and retrained/deployed to your device? My voice is pretty high pitched compared to many of the recordings in that dataset, and thus doesnât work for me either without further samples uploaded to the training/testing sets.
Are you able to see the microbit correctly classifying the background noise?
Have you cloned the project to your own account and added recordings of your own voice and retrained/deployed to your device? emphasized text
Yes I dit that. I had 1 minute of microbit , i didnât work, now I have 5 min as suggested by Jan, but still doesnât work.
My voice is pretty high pitched compared to many of the recordings in that dataset, and thus doesnât work for me either without further samples uploaded to the training/testing sets.
Are you able to see the microbit correctly classifying the background noise?
I have not tested yet. How do you do ?