Hi,
in this blog:Low Power Deep Learning on the OpenMV Cam powered by the Cortex-M7 Pro | OpenMV
Note that you should keep in mind the CMSIS-NN library and conversion scripts have limitations on the number and types of supported layers - so your model should be simple.
I know that lenet is small, but can I use GoogleNet, VGGNet, AlexNet, or Resnet?
Maybe they are too big to run on OpenMV