• #MicroPython: Home Automation using Blynk connected to a WiPy 3.0 / 2.0

      MicroPython | 2 min | 104


      blynk
      home automation
      micropython
      wipy 2.0
      wipy 3.0

      This time a quick tutorial to control your WiPy 3.0 / 2.0 or an ESP32 using Blynk.

      Blynk is the most popular mobile app for the IOT. Works with anything: ESP8266, Arduino, Raspberry Pi, SparkFun and others.

      I found a library to connect MicroPython to Blynk but it is only compatible with the WiPy 1.0. Thus, I modified it and made it compatible with the WiPy 3.0 / 2.0 and with the ESP32 running MicroPython. If you do not have any idea about MicroPython, I recommend you to read this tutorial.

      This is what I will try to accomplish in this tutorial:

      1. Install MicroPython (if you are using an ESP3...
    • #MicroPython: Programming an ESP using Jupyter Notebook

      MicroPython | 6 min | 259


      analytics
      esp32
      jupyter
      micropython

      I was looking at my last articles about MicroPython and my new articles about Jupyter and Docker, and I thought if it is possible to make a mix between Jupyter and the ESP boards. I use usually Visual Studio Code to program the ESP but for analytics I use Jupyter. I looked if it was possible to connect the Jupyter kernel to the ESP using the serial port and: Yes!, it is possible. This can be a great tool to teach kids to access data from connected sensors and analyze it using a browser with Jupyter.

      This is what I will try to accomplish in this tutorial:

      1. Install MicroPython
      2. Install the Jupyte...
    • Happy New Year!

      MicroPython | 1 min | 72


      happy new year
      micropython
      xmas lights

      Out with the old, in with the new! Happy 2019!

      It's been a two years now since I started this blog. It's a hard job to maintain it up-to-date but I still have fun writing and coding for this purpose! I hope the next year will be better than this one! :)

      This post includes a new video for happy new year! The video combines some of the MicroPython code, that I've published this year. I'll be uploading the repo to GitHub in the next days. But, in the meantime enjoy the video, and check the MicroPython projects here!

    • #MicroPython: Visual Studio Code as IDE

      MicroPython | 2 min | 336


      atom
      esp32
      esp8266
      micropython
      visual studio code
      wipy

      Quoting the official MicroPython's website:

      MicroPython is a lean and efficient implementation of the Python 3 programming language that includes a small subset of the Python standard library and is optimised to run on microcontrollers and in constrained environments.

      Besides C++ and C, I use MicroPython to program microcontrollers, especially the ESP32/ESP8266 types. These two microcontrollers are compatible with MicroPython and it is easy to integrate sensors and actors programming using this language. I wrote a tutorial about installing MicroPython on the ESPs, as well a lot of articles a...

    • Merry XMAS and Happy 2019!

      MicroPython | 1 min | 22


      happy new year
      jupyter
      merry xmas
      micropython
      xmas lights

      LeMaRiva|tech wishes you a Merry Christmas and a Happy New Year! To celebrate I made a video using the Xmas-lights from last year, but this time I connected the ESP32 to a Jupyter kernel to control the lights. A new Jupyter-ESP32 tutorial is coming soon. In the meantime, you can track Santa and spend time with your family!

      Python Code: https://github.com/lemariva/Xmas-lights

    • #Zerynth: ESP32 & Google IoT Core - Part 2: Getting data from Smart Power Outlets

      MicroPython | 2 min | 155


      esp32
      google cloud platform
      google iot core
      micropython
      smart power outlets
      zerynth

      This part 2 of the tutorial will allow you to get data from the smart power outlets and send it to the Google Cloud Platform (GCP) throught the Google IoT Core and using an ESP32 programmed with Zerynth (Python). This data is not usually available to the user (directly, you need to use the power outlet application), and it is sent to the company servers.

      If you want to check, if your power outlets are compatible for this tutorial, they should have the port 6668 opened. To check that:

      >>> nmap <<ip-address>> -p 6668
      [...]
      Host is up (0.13s latency).
      
      PORT     STATE SERVICE
      6668/tcp open  irc
      
      ...
    • #MicroPython: Controlling Smart Power Outlets using an ESP32

      MicroPython | 5 min | 790


      esp32
      home devices
      micropython
      smart power outlets
      tuya

      Today there is a wide range of offer for home automation devices. A lot of sensors, actors etc. can be connected to the cloud and be controlled using Google Home, Amazon Alexa, your smartphone, etc. There are a lot of companies offering low cost devices, e.g. Sonoff, Tuya, Teckin etc. Most of these solutions are based on ESP32 or ESP8266, and all of them send data to cloud solutions usually deployed on Amazon services, and the data is only accessible using the Android/iOS applications. They can be also controlled using voice commands over Google Home or Amazon Alexa devices.

      Nice, but... my a...

    • #MicroPython: ESP32 sending data using LoRa

      MicroPython | 3 min | 2088


      esp32
      lora
      micropython
      ssd1306
      sx1276

      LoRa (Long Range) is a patented digital wireless data communication technology. It was developed by Cycleo of Grenoble in France and then acquired by Semtech in 2012. Semtech defines the Lora Technology "as the DNA of IoT, which connects sensors to the Cloud and enables real-time communication of data and analytics that can be utilized to enhance efficiency and productivity".

      To sum up, LoRa is a wireless data communication technology that enables very-long-range transmissions (more than 10 km in rural areas) with low power consumption. It uses license-free sub-gigahertz radio frequency bands ...

    • #Zerynth: ESP32 & Google IoT Core - Part 1: Sending data to the Cloud

      MicroPython | 7 min | 1231


      esp32
      google iot core
      micropython
      mqtt
      zerynth

      There are lot of tutorials about connecting the ESP32 to a cloud service, but I planned to connect these boards using MicroPython directly to the cloud. That means, I didn't want to use a hardware or software bridge. I wanted to use the Google IoT Core, but MicroPython doesn't support JSON Web Token (JWT), which is needed for the device authentication. I tried to write the library myself, but it didn't work, because of the needed dependencies and the small memory available on the ESP modules. But, I found Zerynth. Zerynth supports JWT and using it, it is possible to connect the ESP32 directly ...

    • #MicroPython: Camera stabilisation application

      MicroPython | 2 min | 260


      ahrs
      esp32
      micropython
      mpu6050
      mpu9255
      wipy

      To continue the series of posts "connecting sensors to MicroPython", this article is about the MPU6050 (you can use also the MPU9255, I am still waiting for the Chinese sensor package) and the WiPy 3.0. Combining the IMU sensor with the WiPy and two micro servos 9g, it is possible to stabilize a camera (tilt/rotate).

      To calculate the compensation needed for the stabilisation, I added the umatrix, quaternion and ulinalg libraries to the project to make matrix multiplication and quaternion to Euler conversion. The ahrs library from Madgwick fusions the data of the accelerometer, gyroscope (and m...