About a year ago I was publishing a Jupyterlab plugin to view 3d files. That’s a quite useful functionality for my Openscad Kernel. Quite some time ago however it stopped from working because it was not compatible with the latest versions of the Jupyterlab kernel any more. So I thought it is about time to upgrade the plugin to support the latest 3.x kernel and add it back to my docker deployment. Today I managed Read more
I finally could tick off the final to-do for my Pico-Arduino project: It is not necessary any more to install the project in advance. The project can now be treated as library and you can just pull it automatically from github with the help e.g. of a cmake fetchcontent. Here is a simple example: cmake_minimum_required(VERSION 3.19.2) set(CMAKE_C_STANDARD 11) set(CMAKE_CXX_STANDARD 17) include(FetchContent) FetchContent_Declare( arduino GIT_REPOSITORY https://github.com/pschatzmann/pico-arduino.git GIT_TAG main) FetchContent_MakeAvailable(arduino) project(use_as_library) add_executable(use_as_library use_as_library.cpp) # Pull in our Read more
Microcontrollers are not suitable to develop and train machine learning models. The resources are just not sufficient for this, but it is possible to use and deploy pre-trained models! I have added a simplified Tensorflow hallo world example where the model has been trained on the sin function, to my Pico-Arduino framework. The solution consists of only 3 implementation files: tf_hallo_world.cpp contains the Arduino sketch tf_hallo_world_model.h contains the (binary) trained model. CMakeLists.txt is used to Read more
Most Arduino based Drone projects are optimized for AVR processors by writing directly to registers and use other AVR specific functionality (e.g. timers interrupts). The multiwii project is a good example of this and it would take quite some effort to convert it to be compatible with the Pico, because this logic is distributed all over the place. I “adopted” the CodeDroneDIY project because I only needed to replace the MotorsSpeedControl.cpp with a implementation which Read more
I am quite enthusiastic about the new Raspberry Pico. However I find the C SDK not very friendly and I prefer to have something as simple as the Arduino API. I did not want to wait for the official Arduino support – so I started my own project. PWM in the Pico I was struggling quite a bit to have PWM working properly and the Pico PWM API is pretty nasty because you have to Read more
I am quite enthusiastic about the new Raspberry Pico. However I find the C SDK not very friendly and I prefer to have something as simple as the Arduino API. I did not want to wait for the official Arduino support – so I started my own project. The major weak spot of the Pico compared to the ESP32 is the missing Wifi and Bluetooth functionality. I finally managed to add examples for the HC05 Read more
I am quite enthusiastic about the new Raspberry Pico. However I find the C SDK not very friendly and I prefer to have something as simple as the Arduino API. I did not want to wait for the official Arduino support – so I started my own project. So far this has been just a Toy Project, but with the addition of SPI, we can now take on some more complex Arduino projects. In order Read more
I had too many micro controllers and sensors and I wanted to have simple box where I can put them and easily find my modules again. This is the perfect use case for 3D printing: Of cause the modules and micro controllers come in different sizes so the design needed to reflect this. It is written in OpenSCAD, so you can adjust it yourself, if you want to optimize the dimensions for your specific case… Read more
Im using Octoprint for my Ender3 on a old Linux 32 bit machine. Unfortunately I was running into problems after a release upgrade of Ubuntu and so I finally decided that it is time to use Octoprint as a Docker image, so that I have the possibility to restore my services easily in the future. For some strange reasons the official Octoprint on Docker Hub is only supporting 16 bit on ARM but not 16 Read more
Introduction Most Microcontrollers have a built in Serial USB functionality that can not be changed (e.g. ESP32, ESP8266, Arduino Nano etc). Some Microcontrollers however allow to (re-)progam the USB functionality (e.g. Raspberry Pico, ESP32-S2, seeeduino xiao etc) and TinyUSB is the project of choice for this. A Microcontroller can either act as USB host or as device. In this blog I will concentrate on the USB device functionality, because this is where the library shines. Read more