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  • Starting to do smart-home appliances with ESP-Mesh

    “ESP–Mesh reduces the loading of smart light devices on the router by forming a mesh with the smart light device.” I’ve started months ago getting some smart lights for home and I’ve chosen Osram since it was about half the price than Phillips VUE. But the thing with this systems, though they work nice and…

  • Reading an image bitmap file from the web using ESP8266 and C++

    There are a couple of different ways to do it, but I wanted to do it after a simple image example, to understand a bit better how reading a stream from the web to get as far as the pixel information and send it to a display. As a reference then I started with ZinggJM/GxEPD…

  • E-Paper driver to make your electronics smaller

    Got from Waveshare some of this E-Paper ESP8266 driver boards: I’m trying to make the electronics of my displays as small as possible and to avoid the wire-chaos inside the case with the goal of having more space for the battery. This will basically spare the need of the driver HAT and additional cables, something…

  • Wemos D1 consumption and VCC pins

    So this 6 min boring video was just an experiment to make a small consumption table comparing how the Wemos D1 mini behaves when receiving power through the 5v and 3v3  pins. 5v: 75.5 avg mA only Wifi 126.5 mA with relay on 2.5 mA on deep sleep mode 3v3: 75.4 avg mA only Wifi…

  • Starting again with Arduino and 3D design

    About a month ago I joined the amazing community of Thingiverse and started uploading my first designs made on Blender. One of the first projects is to control automatically the curtain blinds to ensure we don’t have to get up to turn them manually. Actually it’s just a great excuse to learn more about arduino…

  • Friction powered Longboard

    This is a redesign of the Rotor Flettner project. The effect works after testing it mounted on a windsurf board but it has a potential flaw: Magnus effect has a smaller force than the wind pulling you to the side. The result is that you go more in the wind direction than in the direction…

  • New project: Portable Flettner-Rotor (Longboard)

    3D model available on tridiv.com The idea come while reading “Symmetry of Sailing” by Ross Garret. The german engineer Anton Flettner was the first to use this physical principle as propulsion engine for a ship in 1922. The still difficult part and open points to discuss that I have in this Winter project are: Material…

  • Peggy version 2.0 Led panel receiving serial data

    This is a modification we did to a Peggy2 led panel. JP1 y JP2 enable the “serial hack” (Map at the footer of this post) The steps to follow if you want to try this: Install this program in the Peggy through USB using Arduino software. This little program is just a loop that renders in the led panel…

  • Modificación para hacer funcionar en serie la Peggy2

    Esta es una modificación que hicimos para poder enviar datos seriales a través de USB al panel de Leds Peggy2. Los pasos a seguir para poder hacer que esta modificación y enviar datos serie son: Instalar este programa en el Peggy a través del software de Arduino. Este programa la peggy en modo “Recibir datos por serie” Basicamente si le…