• Home Automation, Raspberry Pi
      2 min | 81

      #CC2531 & Raspberry Pi: Philips HUE bridge v1 replacement

      Home Automation, Raspberry Pi | 2 min | 81


      cc2531
      mitm-attack
      philips bridge
      philips hue
      raspberry pi 4b
      zigbee

      As you may know, the Philips Hue Bridge v1 has support until April 30, 2020. This means, after April 30, 2020, no software updates will be made available and it will not connect to the online services. However, you can still control it locally via the "dedicated Philips Hue Bridge v1 app". Nevertheless, you have a device (connected to your network) that can be a "treasure" for hackers (MITM-Attacks), and the "dedicated Philips Hue Bridge v1 app" will disappear shortly! (...

    • LoRa, MicroPython
      2 min | 400

      #M5Stack Atom Matrix: LoRaWAN node running MicroPython

      LoRa, MicroPython | 2 min | 400


      lorawan
      m5stack
      m5stack atom
      micropython
      the things network

      This tutorial is about programming the M5Stack Atom using MicroPython to transfer data to a LoRaWAN gateway. The gateway is then connected to the "The Things Network" (TTN) to process the data.

      Before you start reading, check out the video of this setup!

      The M5Stack ATOM Matrix is the most compact development board in the M5Stack development kit series with a size of only 24 x 24 x 14 mm and a weight of 14 g.

      It has:

      • 6 GPIO (Dupont Pins)
      • GROVE/4Pin PH2.0 interface
      • 5 x 5...
    • MicroPython
      4 min | 110

      Tutorial: Getting Started with MicroPython on ESP32, M5Stack and ESP8266

      MicroPython | 4 min | 110


      diy projects
      esp32
      esp32 projects
      esp8266
      m5stack
      micropython
      tutorial

      MicroPython has almost all the features of Python, and allows you to easily interact with microcontrollers and sensors, making them accessible to both beginners and experienced Python programmers.

      If you are new to MicroPython, I quote the official MicroPython page for you:

      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 optimized to run on microcontrollers and in "constrai...

    • PCB/Board designs, Product Reviews
      4 min | 120

      #WAVE2: an Ensemble Yourself Oscilloscope (DSO)

      PCB/Board designs, Product Reviews | 4 min | 120


      diy
      oscilloscope
      product review
      soldering
      wave2

      Last month, I published a review of the DSO138. This time, I put together the WAVE2 (15801K) and I review it in this article. The WAVE2 is a 2-channel portable oscilloscope design by JYETech for a hobbyist. It has a resistive touch screen display, X-T (signal-time) / X-Y (signal-signal) plotting functionalities, memory (4 blocks), measurement functionalities (V -max, min, avr, pp, rms-, frequency, duty cycle), serial interface and can be powered using an external 5V source (micro ...

    • MicroPython
      4 min | 1615

      #MicroPython: a three-color E-INK display controlled using an ESP32

      MicroPython | 4 min | 1615


      diy projects
      e-ink display
      e-paper
      getting started
      micropython
      micropython extensions
      tutorial

      This is a tutorial to control and display widgets on an E-INK display using an ESP32. Three widgets are available:

      • Weather: weather forecast obtained using the OpenWeatherMap API.
      • News: news highlights obtained using the NewsApi API.
      • Notes: notes that can be added using a web-server that runs on the ESP32.

      The result can be seen in this video:

      Thus, in this tutorial, I will try to achieve the following:

      • A guide to compile MicroPython to freeze modules;
      • A setup guide for ...
    • MicroPython
      2 min | 1654

      #MicroPython: Portable time-lapse camera using an ESP32-CAM

      MicroPython | 2 min | 1654


      diy projects
      esp32
      esp32-cam
      timelapse
      tutorial
      video

      This tutorial extends the article MicroPython: Taking photos with an ESP32 and in this case, the ESP32-CAM running MicroPython takes a photo every 5 seconds and saves it on the microSD card. The photos can be then combined into a time-lapse video! :)

      The MicroPython official version doesn't support I2S interface. However, tsaarni wrote a driver for the OV2640 and forked the MicroPython repository to include it. Thus, you need to follow the instructions in this article: MicroPyt...

    • MicroPython
      8 min | 1723

      #Tutorial: ESP32 running MicroPython sends data over LoRaWAN

      MicroPython | 8 min | 1723


      esp32
      getting started
      lora
      lorawan
      micropython
      tutorial
      wireless communication

      LoRa is a wireless data communication technology that enables you to transmit data over a very-long-range (more than 10 km in rural areas) with low power consumption. It uses license-free sub-gigahertz radio frequency bands as the 169 MHz, 433 MHz, 868 MHz for Europe, and 915 MHz for North America.

      In October 2018, I published an article about LoRa and ESP32, and I uploaded a project to GitHub. The project includes a SX127x driver for ESP32 running MicroPython. However,...

    • MicroPython
      6 min | 1435

      #Tutorial: MicroPython and Bluetooth (BLE) on M5Stack

      MicroPython | 6 min | 1435


      bluetooth
      diy projects
      m5stack fire
      micropython
      tutorial
      vscode

      The M5Stack is a modular open-source toolkit for developing IoT applications. It is based on an ESP32, which is the core module and there are a lot of stackable modules that you can use for different projects. This enables to do rapid and high-quality prototyping!

      You can program the core device using the ESP-IDF framework, the Arduino-IDE, Blockly or MicroPython. Unfortunately, the BLE is still not available using the official M5Stack MicroPython firmware (forked from LoBo). Howeve...

    • PCB/Board designs, Product Reviews
      3 min | 150

      #DSO138: an Ensemble Yourself Oscilloscope (DSO)

      PCB/Board designs, Product Reviews | 3 min | 150


      dso138
      dyi
      oscilloscope
      product review
      soldering

      A few months ago, I was looking for a small digital signal oscilloscope (DSO) module, and last week I got a DSO138 DIY kit from DigitSpace. The oscilloscope is originally from the company JYE Tech, but as usual, there are a lot of copies.

      The oscilloscope has a bandwidth of 200kHz, a maximum sampling rate of 1MHz and a maximum input voltage of 50Vpk that are sufficient for the applications that I am programming using ESP32 boards (more details here).

      In this article, I include a qui...