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  • HowTo: Zigbee – Integrate Ikea TRADFRI outlet E1603/E1702/E1708 into Node Red via zigbee2mqtt
    The TRADFRI plug is a simple way to switch existing consumers such as lamps via your smart home system via Zigbee The consumer can be switched on and off. At the same time, the socket also acts as a signal amplifier (repeater) for all other Zigbee devices. How to integrate the TRADFRI plug into your […]
  • HowTo: NodeRed – Presence detection via ping requests
    In order to be able to automate your own smart home properly, one function is quite important: Are residents present or not? This is the only way the system can, for example, automatically deactivate the heating, switch certain lights on or off or even activate the alarm functions. In the article Node Red / FritzBox […]
  • HowTo: Raspberry Pi – Use Docker container with OpenMediaVault / OMV and Portainer
    Another practical advantage of OpenMediaVault is that thanks to the prepared Docker and Portainer installation, you can easily add additional functions. Docker containers are a type of software package that make it much easier to distribute and install programs. Instead of having to install the desired program, you simply have to activate the Docker container […]
  • HowTo: OpenMediaVault – Install and configure DLNA plugin for media streaming
    In the article Raspberry Pi – music streaming to the Raspberry Pi via DLNA client, I have already described how to use the Raspberry Pi as a playback device for content from a DLNA server. DLNA describes a standard with which you can easily stream content across devices in your own network. For example, you […]
  • HowTo: OpenMediaVault – Set up an external hard drive as a drive
    As the name of OpenMediaVault suggests, it is about managing media. Of course, you also need the appropriate storage space for this. In the article NetworkAttachedStorage / Building a NAS from a RaspberryPi 4 yourself, I used an external USB hard drive. However, many other drives can also be used as storage space expansion for […]
  • HowTo: Zigbee – Flash the Electrolama zig-a-zig-ah! (zzh!) USB stick coordinator with zigbee2mqtt firmware
    In the article Zigbee – Preparing a Sonoff zigbee 3.0 USB Dongle Plus for zigbee2mqtt, I described how to write the firmware for zigbee2mqtt to a Zigbee stick from Sonoff. An alternative to this Zigbee stick is the Electrolama zig-a-zig-ah! (zzh!) Coordinator USB stick by Electrolama I have described in the following article how flashing […]
  • HowTo: OpenMediaVault – Create another user
    As soon as you work with OpenMediaVault and use various services and plugins, it makes sense to create a new user at some point. In this way, you can set access rights in a well-dosed manner, which ultimately helps to increase security. The following article describes how you can create a new user using OpenMediaVault. […]
  • HowTo: Raspberry Pi – Evaluate MPR121 touch sensor via I2C and Node Red
    Thanks to the I2C bus, the Raspberry Pi can be equipped with a variety of practical sensors and actuators. The MPR121 offers a (in my opinion) very elegant way for user input. The MPR121 is a controller that makes it possible to evaluate up to 12 touch electrodes. You can use it to set up […]
  • HowTo: pxlBlck – Flash firmware with esp web tools directly from the browser
    Flashing the ESP8266 or ESP32 is not that easy if you have not had much contact with microcontrollers before. Now, there is something very cool that makes this process super easy. The people behind ESPhome have developed a web flasher that allows you to flash ESP microcontrollers directly from a Google Chrome browser. Without installation […]
  • HowTo: OpenMediaVault – Enable HTTPS encryption for web access
    After installing OpenMediaVault, the first thing you should do is enable HTTPS encryption for web access. This ensures that when you access the OMV web interface, all data is encrypted with HTTPS. You should activate this option, especially if you also want to access your OMV instance via a public network. What you have to […]
  • HowTo: Raspberry Pi – Get an overview of the available storage with NCDU
    If you often work with large or many files on the Raspberry Pi, sooner or later you will face the problem that the available memory is running out. At least that’s what happened to me. Especially when there are several distributed files, it is not so easy to get an overview of which files and […]
  • HowTo: Node Red – Read live data of an SMA EV CHARGER 22 Wallbox
    I recently added an SMA EV Charger 22 Wallbox to my network. Of course, this is primarily used to charge an electric car. Nevertheless, I was of course curious which values could be read out and processed there. The Node Red code presented below is my current status. It can already be used to read […]
  • HowTo: Raspberry Pi – Install OpenMediaVault OMV on the RaspberryPi
    In the article RaspberryPi – NetworkAttachedStorage / build your own NAS from a RaspberryPi 4, I had already described that the (relatively) new Raspberry Pi 4B is also very well suited to building an inexpensive but powerful “Network Attached Storage” or NAS. A NAS is a hard drive that is connected to the network and […]
  • HowTo: Raspberry Pi – Build NetworkAttachedStorage / NAS using a Raspberry Pi 4
    For the past few years, I’ve mostly relied on Synology NAS as my home storage solution. These come with a nice interface and can be configured easily but also extensively. Unfortunately, they are also comparatively expensive. At some point I stumbled across the Open Media Vault (OMV) project. This is a package that you can […]
  • HowTo: Raspberry Pi – Create Image from system SD card
    As is so often the case with backups, you usually only think about making one when it’s too late for it. That’s what happened to me recently with one of my RaspberryPis. The curse and blessing of these is that they use an SD card as the main drive. This makes installation very easy. Unfortunately, […]
  • HowTo: Raspberry Pi – Mount drive in Linux
    As a Raspberry Pi user, sooner or later you will stumble over the question of how to connect a USB stick, external hard drive or SD card to the Raspberry Pi and access it. The process is similar for all drive types. Whether USB stick, external hard drive or SD card. After connecting to the […]
  • HowTo: Raspberry Pi – Read the unique ID of a Raspberry Pi
    Normally, all data of a Raspberry Pi is stored on the inserted SD card. This has the advantage that you can simply insert an operational SD card into another Raspberry Pi. If your Raspberry Pi is damaged, for example, it is sufficient to insert the SD card into a running hardware and you can continue. […]
  • News – Summer 2022
    It’s been a while since I gave an overview of my current projects. So here’s a little update. 🙂 Inhalte1 WinDIY_21.1 Hub2 printonTurbine – A 3D printed pelton turbine3 pxlBlck_16x16micro4 pxlBlck_10x11mini5 pxlBlck_ringMicro6 solarSens7 pxlDigit24_mini WinDIY_2 I’ve been working on the second version of WinDIY for quite a while now. On the one hand, this is […]
  • HowTo: Node Red – Control GPIO of an ESPEasy device
    EspEasy and Node Red each offer a number of options for automation. You get even more options if you combine both systems. In the article ESPEasy – Execute commands and actions via HTTP , MQTT and UDP I have already described in general how to send certain commands to an ESPEasy device from Node Red. […]
  • HowTo: pxlBlck – Build the pxlDigit_clock using the pxlDigit_PCB
    I got the idea for the pxlDigit_PCB while building the pxlDigit (article here: https://nerdiy.de/howto-elektronik-seven-segment-digit-pxldigit-aus-ws2812-leds-bauen/). There the pxlDigit is made up of individual WS2812 LED segments. To do this, the LEDs must first be glued into the 3D printed housing and then soldered together in the housing. This step in particular is not that easy due […]
  • HowTo: Zigbee – Integrate Ikea SYMFONISK E1744 remote control into NodeRed via zigbee2mqtt
    The Ikea SYMFONISK E1744 remote control is actually intended to control the SYMFONISK WiFi speaker from Ikea. This can then be used to control the volume or change the track. Thanks to Zigbee, the Ikea SYMFONISK E1744 remote control can also be used very well to control your SmartHome. How you can integrate the remote […]
  • HowTo: Anemosens – Build a 3D printed wind sensor / anemometer
    To be honest, the idea of a 3D printable wind sensor (in technical jargon “anemometer”) has been floating around in my head for a long time. Initially I could have used it as a wind sensor for one of my weather stations. At that time I had an FDM 3D printer available and also a […]
  • HowTo: NodeRed – FRITZ DECT 200 Steckdose mithilfe von NodeRed steuern und auslesen
    Die FRITZ!Box ist nicht nur ein sehr guter Router für das Heimnetzwerk. Sie kann – ausgestattet mit dem passenden Smart Home Zubehör – auch zur Smart Home Zentrale Eures Hauses bzw. Wohnung werden. Dabei ist alles notwendige bereits in der FRITZ!Box verbaut. Neue Sensoren oder Aktoren werden einfach kabellos über den DECT Standard mit der […]
  • HowTo: Tasmota – Steckdose mit Einschaltverzögerung verzögert einschalten
    Um ganz Sicher zu gehen, dass ich nach dem Verlassen meines Arbeitsplatzes/Schreibtisch auch wirklich alle Geräte (Lötkolben, etc.) ausgeschaltet habe, schalte ich schon seit Jahren die Verbraucher an meinem Schreibtisch über eine zentrale Steckdose. Leider hat sich mit der Zeit daraus ein nerviges Problem entwickelt. Denn an dieser zentralen Steckdose hängen ein paar Verbraucher, welche […]
  • HowTo: Zigbee – IKEA STYRBAR Taster E2001/E2002 über zigbee2mqtt in NodeRed einbinden
    Der IKEA STYRBAR Taster ist etwas größer als der kleine Bruder der Ikea TRADFRI E1743 Taster. Dafür bietet er aber auch ein paar mehr Funktion und – aufgrund der zwei eingesetzten AA Batterien – eine längere Batterielebensdauer. Neben den einfachen Ein- und Aus-Tasten (bei denen auch lange Tastendrücke ausgewertet werden) hat der Taster noch zwei […]
  • HowTo: Zigbee – Xiaomi Aqara MCCGQ11LM Tür- bzw. Fenstersensor über zigbee2mqtt in NodeRed einbinden
    In dem Artikel zum Sonoff SNZB-03 Bewegungsmelder und Ikea TRADFRI Bewegungsmelder Bewegungsmelder hatte ich schonmal erwähnt, dass sich ein Smart Home auch zu einer (eingeschränkten) Alarmanlage ausbauen lässt. Dabei können die Bewegungsmelder den Innenraum überwachen und bescheid geben, wenn in der Wohnung/Haus Bewegungen erkannt wurden obwohl niemand zuhause ist. Eine weitere Strategie um über einen […]
  • HowTo: Zigbee – Ikea TRADFRI Bewegungsmelder E1525/E1745 über zigbee2mqtt in Node Red einbinden
    Im Artikel über den Sonoff SNZB-03 Bewegungsmelder hatte ich schonmal beschrieben wie man einen Bewegungsmelder nutzen kann um das eigene SmartHome weiter zu automatisieren. So lassen sich nicht nur Lichter automatisch ein- bzw. ausschalten. Auch eine (einfache) Alarmanlage lässt sich so realisieren. Eine weitere Alternative zu dem Sonoff SNZB-03 Bewegungsmelder ist der Ikea TRADFRI Bewegungsmelder. […]
  • HowTo: Zigbee – 4x Wandtaster TuYa TS0044 mithilfe von Node Red auslesen
    In einem großen Teil meines Smart Homes verwende ich die Ikea TRADFRI E1743 Taster. Mit diesen lassen sich bequem bis zu vier Geräte ein- und ausschalten. Vor kurzem bin ich dann aber über den hier gezeigten TuYa TS0044 Wandtaster gestolpert. Dieser Taster kann durch seine vier Schaltflächen bis zu 12 Geräte schalten. Denn er kann […]
  • HowTo: Node Red – Temperatur des FRITZ! DECT Repeater 100 auslesen
    Den FRITZ! DECT Repeater habe ich mir vor kurzem zugelegt um die Telefonreichweite meiner DECT Telefone zu verbessern. Leider muss meine Fritz Box im Keller stehen, weil nur dort ein passender Anschluss ans Internet möglich ist. Eigentlich kein Problem. Allerdings leidet darunter die Qualität bzw. Reichweite der DECT Verbindung zwischen Telefonhörer und FritzBox. Also habe […]
  • HowTo: Fritz Box – AIN Eures SmartHome Geräts herausfinden
    SmartHome Geräte die mit der FRITZ!Box kompatibel sind werden über eine AIN angesprochen. Diese AIN ist eine Eindeutige Identifikationsnummer, welche dem jeweiligen Gerät zugewiesen ist. Wenn Ihr zum Beispiel mithilfe von Node Red die Temperatur eines Fritz DECT Heizkörperthermostats einstellen oder eine FRITZ!DECT 500 Smart Home Lampe ein- und ausschalten wollt müsst Ihr also die […]
  • HowTo: Zigbee – IKEA TRADFRI Shortcut Taster E1812 über zigbee2mqtt in Node Red einbinden
    Der IKEA TRADFRI Shortcut Taster E1812 ist der kleine Bruder des Ikea TRADFRI E1743 Taster. Beide sind in der Größe Identisch. Die Einzigen Unterschiede beim Shortcut Taster sind, dass dieser nur über eine Schaltfläche (anstatt zwei) verfügt und die Tastfläche selber gestaltet werden kann. Dazu sind im Lieferumfang des Tasters mehrere Sticker enthalten, welche sich […]
  • HowTo: Zigbee – TuYa Raumtemperatur und Luftfeuchtigkeitssensor TS0201 über zigbee2mqtt in Node Red einbinden
    Über den TuYa TS0201 Temperatur und Luftfeuchtigkeitssensor bin ich auf der Suche nach eine einfachen Luftfeuchtigkeitssensor gestolptert. Eigentlich war ich nämlich auf der Suche nach einem simplen Luftfeuchtigkeitssensor mit Display um die Luftfeuchtigkeit im Keller anzeigen zu können. Der Hintergrund war, dass ich so sicherstellen wollte, dass die eingelagerten Kartons, Akten und der ganze andere […]
  • HowTo: Node Red – Pushnachrichten mithilfe von Pushover aus NodeRed versenden
    Bisher habe ich für die Benachrichtigungen von meinem SmartHome die Pushbullet Node genutzt. Leider ist die Pushbullet-App – also der Gegenpart auf Eurem Smartphone mit dem Ihr die Nachrichten empfangt – mittlerweile nicht mehr für iOS verfügbar. Wollt Ihr Euch also auch auf Eurem iOS Gerät über die Ereignisse in Eurem SmartHome informiert bleiben müsst […]
  • HowTo: Raspberry Pi – Linux Systeminformationen abrufen mit Neofetch
    Falls Ihr mal in die Situation kommt schnell die wichtigsten Systeminformationen über euren Raspberry Pi oder ein anderes Linux System sammeln zu müssen ist Neofetch ein sehr hilfreiches Tool. Mit nur einem Befehl könnt Ihr so die wichtigsten Systemdaten abrufen und ansehnlich darstellen lassen. Wie Ihr Neofetch nutzen könnt ist im folgenden Artikel beschrieben. Inhalte1 […]
  • HowTo: NodeRed – Automatischer Frostwarner via Pushbullet, Pushover oder E-Mail
    Schon eine Weile besitze ich eine dieser Autoabdeckungen die man über das Auto stülpen kann um zu verhindern dass sich bei kalten Temperaturen Eis auf den Scheiben bildet. Diese Abdeckung ist ein sehr einfacher Weg sich morgens das Freikratzen der Autoscheiben zu sparen. Einziger Nachteil bei diesen Abdeckungen: Man muss die Abdeckung vorher über das […]
  • HowTo: Zigbee – Sonoff SNZB-03 Bewegungsmelder über zigbee2mqtt in NodeRed einbinden
    Ich finde so richtig praktisch wird ein SmartHome immer dann wenn es Arbeit abnimmt oder das Leben angenehmer macht. Zugegeben die Möglichkeiten sind dahingehend natürlich nicht riesig. Aber wer schonmal spät Abends voll bepackt mit Einkaufstaschen die dunkle Wohnung betreten hat, ist schonmal recht dankbar, wenn zum Beispiel das Licht automatisch angeht. Damit so etwas […]
  • HowTo: Zigbee – Ikea TRADFRI E1743 Taster über zigbee2mqtt in NodeRed einbinden
    Der IKEA TRADFRI Taster E1743 ist einer der meistgenutzten Taster in meinem SmartHome. Er ist mit (aktuell) 6 Euro pro Stück sehr günstig und gleichzeitig ist die Qualität sehr gut und der Lieferumfang ordentlich. Das praktische daran ist außerdem, dass sich mit ihm bis zu vier Funktionen steuern lassen. Die zwei Schaltflächen können nämlich kurz […]
  • HowTo: Zigbee – Geräte bzw. Sensoren und Aktoren an zigbee2mqtt anmelden
    Damit Ihr Zigbee-Geräte für Euer SmartHome nutzen könnt müssen diese natürlich zuerst mit Eurem Zigbee Netzwerk verbunden werden. Dies lässt sich auf verschiedenen Wegen umsetzen. Der einfachste Weg neue Geräte zu Eurem Zigbee Netzwerk hinzuzufügen ist der über das zigbee2mqtt Dashboard. Das Dashboard sollte dazu natürlich schon eingerichtet sein. Hinweise wie Ihr dieses Dashboard aktiviert […]
  • HowTo: Zigbee – Prepare a Sonoff zigbee 3.0 USB Dongle Plus for zigbee2mqtt
    To control your SmartHome with the help of zigbee2mqtt you need a Zigbee adapter so that you can also connect Zigbee sensors or actuators. This is the interface between the Zigbee device and the SmartHome system (e.g. NodeRed) and is often available in the form of a simple USB stick including an antenna. One of […]
  • HowTo: Zigbee – Einen CC2530/CC2531 coordinator unter zigbee2mqtt zu einem anderen coordinator migrieren
    Bereits seit einer ganzen Weile nutze ich zigbee2mqtt um Zigbee-Sensoren und -Aktoren in mein SmartHome einzubinden. Dazu habe ich seit ein paar Jahren einen auf dem CC2530 bzw. CC2531 IC basierenden USB Dongle mit der zigbee2mqtt Firmware genutzt. Nun ist mit der Zeit das Zigbee-Netzwerk so weit gewachsen, dass es Zeit für einen Leistungsfähigeren Zigbee-USB-Dongle […]
  • HowTo: Zigbee – Administration of Zigbee2mqtt via the dashboard
    Initially, Zigbee2mqtt could only be configured and controlled via the configuration file or access to the MQTT server. In the meantime, however, there is a very useful extension for zigbee2mqtt that makes it possible to configure zigbee2mqtt via an integrated web server. This means you simply visit a website that can be reached via the […]
  • HowTo: Zigbee – Installing zigbee2mqtt on the Raspberry Pi
    I recently started converting parts of my SmartHome to the Zigbee standard. In the past I still used sensors and actuators based on the simple 433Mhz radio. Unfortunately, there are fewer and fewer sensors or actuators for this “radio standard”. Last but not least, the very low prices for Zigbee accessories at Ikea were the […]
  • HowTo: ESPEasy – Setup time synchronization with the DS3231 / DS3232 RTC
    Thanks to the NTP server, ESPEasy is able to call up the time via the WiFi connection. This option is very easy to set up and is described, for example, here: ESPEasy – Activate NTP time retrieval from the Internet But what if no NTP server is available for the time retrieval? In this case […]
  • HowTo: PCB – Assemble the ButtonBoard PCB V1.2
    The ButtonBoard PCB is my attempt to kill several birds with one stone. On the one hand, I’ve always been looking for a universal and easy-to-program remote control for the often very individual control options in my smart home. On the other hand, I wanted to have a simple way of equipping my projects (for […]
  • NodeRed – Control the FRITZ!DECT 500 RGB smart lamp with the help of NodeRed and FritzBox
    I recently tested the DECT radiator thermostat for the FritzBox and integrated it into my NodeRed installation. That’s why I was of course curious to see how the FRITZ! DECT 500 RGB LED lamp works with the FritzBox and whether it can be controlled just as easily from NodeRed as the radiator thermostat before. As […]
  • News: Okotober 2021 – Aktuelle Projekte
    Ich finde es ist mal wieder Zeit für einen kleinen News-Artikel in dem ich Euch erzähle was in den letzten Wochen so passiert ist bzw. woran ich arbeite. 🙂 Inhalte1 Anemosens auf dem dritten Platz beim Move-It-3DP-contest2 HubCtrlr v1.2 – Steuergerät für die Nabenmechanik von WinDIY_23 SolarSens Anemosens auf dem dritten Platz beim Move-It-3DP-contest Für […]
  • HowTo: PCB – Assembly of the Anemosens_MCU PCB
    With the Aenmosens_MCU board it is possible to use Anemosens as a stand-alone anemometer, which can be used for long-term observations in remote areas (hence the microSD card slot) or as a further part of your weather station (hence the RS485 interface). The RS485 interface is used to provide the measured data via Modbus. In […]
  • HowTo: PCB – Assemble the Anemosens sensor PCB
    The Anemosens sensor PCB is the basis for the sensor assembly of Anemosens, a 3D printed anemometer that I developed for the second version of WinDIY. For this purpose, an AH49E Hall sensor and an AS5048B I2C 14 bit magnetic rotary encoder are installed on the PCB. The AS5048B is used to determine the wind […]
  • HowTo: PCB – Assembly of the pxlDigit_PCB
    The idea for the pxlDigit_PCB came to me while building the first version of the pxlDigit (article here: https://nerdiy.de/en/howto-elektronik-sieben-segment-ziffer-pxldigit-aus-ws2812-leds-bauen/). The pxlDigit is built up from individual WS2812 LED segments. To do this, the LEDs must first be glued into the 3D printed housing and then soldered together in there. This step in particular is not […]
  • HowTo: PCB – pxlBlck_multiPCB
    One of my past PCB projects is the “pxlBlck_multiPCB”. As the name suggests, this board is the heart of several future pxlBlck variants. So far I have used the Wemos D1 Mini Board with the ESP8266 built into it as the main MCU in many projects. The circuit is supplied via a micro USB connection. […]
  • News: June 2021 – My projects for the HackadayPrize 2021
    A few days ago the Hackaday Prize 2021 was announced. It became clear to me relatively quickly that I would like to try to submit a few of my projects again this year. The schedule was pretty tight. I had already read in the comments under the article on the HackadayPrize that the deadlines for […]
  • News: May 2021 – Current projects and developments
    At the moment it has become a little quieter here on Nerdiy.de. That was because I was working harder on developing a few new projects. Unfortunately, caring for the website or creating new articles often suffers as a result. But since the roughest plans have now been completed, this will soon change again. 🙂 Until […]
  • HowTo: 3D Printing – Rapid prototyping service of PCBWay.com
    I am currently working on a project that unfortunately exceeds the capabilities of my 3D printer. So far I was able to print all the necessary components on my 3D printer with the actually quite generously dimensioned print bed dimensions of 235x235mm. When the projects got bigger I simply split them up into several small […]
  • HowTo: pxlBlck – Build your own pxlBlck_CassetteLamp
    MP3 players, smartphones and USB sticks with 128GB and more memory are now part of everyday life. Storing and transporting music has therefore never been easier. About 30 years ago it looked different. The “USB stick of the 80s / 90s” was the cassette. Of course, I still have a lot of them flying around […]
  • HowTo: ESPEasy – Connect the APDS-9960 gesture sensor to the ESP8266 / ESP32 and read its values
    The APDS-9960 is a sensor that can be connected to a microcontroller such as the ESP8266 via the I2C bus. With the help of the sensor it is possible to recognize simple gestures, to measure the brightness, the distance of an object to the sensor and the color of the light hitting the sensor. The […]
  • HowTo: 3D printing – Build a Y-distributor for a 125mm exhaust hose
    While setting up the suction system for my soldering station and the chamber of my 3D printer, I was faced with the problem that I had to somehow split the suction nozzle of the suction system into two ways. The aim was to be able to control both the branch to my soldering station and […]
  • News: PCB-Entwicklung – I2C_mtrDrvr V1.0, servoDigitCtrlr, pxlBlck_multiPCB, XGZP6847_adapter and nanoPxl V1.4
    At the moment I am working on a few PCB projects in which I would like to give you a little insight here. 🙂 All of the boards presented in the following have been manufactured by PCBWay.com. They support my projects and have made the boards available to me. If you are looking for a […]
  • HowTo: ESPEasy – Set up password protection, save and restore configurations
    I am not sure whether ESPs can really be abused to set up a botnet. Either way, you shouldn’t neglect the issue of security, even with the small ESPEasy devices. The first small hurdle that should make it difficult for potential attackers or simply curious visitors to read or even change the configuration of your […]
  • HowTo: Node Red – Switch the Raspberry Pi screen on and off
    So that my MagicMirror is only switched on when I actually use it, I have configured a small automation using NodeRed. The screen is only switched on if movement is detected. The screen itself is switched on and off using the “vcgencmd” command. (More information here: https://www.raspberrypi.org/documentation/raspbian/applications/vcgencmd.md) With the following NodeRed code you can switch […]
  • HowTo: 3D printing – Build a solder fume extraction hose incl. funnel
    I also needed a suitable hose system to build my solder fume extraction system. After a little trial and error, I decided to use the standard exhaust air hoses. These are actually used to transport the exhaust air from extractor hoods or dryers. For the solder fume extraction system I decided to use a 125mm […]
  • HowTo: Node Red – Trigger actions via Windows shortcut / mouse click
    So that I can switch off my 3D printer automatically after the printing process, I installed a Sonoff relay so that it can interrupt the power supply to the entire 3D printer. The relay is then controlled via MQTT and automatically switches off the printer after the 3D printing is complete. The printer can be […]
  • HowTo: ESPEasy – Connect VL53L0X / VL53L1X distance sensor to the ESP8266 / ESP32 and read its data
    The VL53L0x or its sister / brother, the VL53L1X is a very precise and relatively inexpensive laser distance sensor. With this, distances can be measured almost at millimeter-accuracy. In one of my other projects (see ESPEasy – level sensor with VL53L0X / VL53L1X) I am already using this sensor to, for example, monitor the level […]
  • HowTo: ESPEasy – Connect the BME280 / BMP280 to the ESP8266 and read its data
    The BME280 is one of the sensors that I use in almost all of my projects. With this sensor one can not only measure the temperature. The air humidity and air pressure can also be measured with it. The BME280 is the perfect sensor if you want to measure the climate data of a room […]
  • HowTo: ESPEasy – Configure MQTT server on the ESP8266 and subscribe to topics
    ESPEasy can read out a large number of different sensors and / or control actuators (see also ESPEasy – Sensors & Actuators). With the help of the “Rules” it is then possible to react to this locally on the ESP and act accordingly. But the collected sensor data can also be sent to other devices. […]
  • HowTo: 3D printing – Build a servo-controlled 125mm butterfly valve
    I recently built an extraction system for my soldering station and the chamber of my 3D printer. The built extraction system has two connections. One of them sucks the air out of the 3D printer chamber with the help of a connected hose and thus ensures that the air in it is regularly freed of […]
  • HowTo: ESPEasy – Connect a rotary encoder to the ESP8266 and evaluate it
    Especially if your own circuit has a display to show values, the next step is often to connect an interface option. You can connect buttons or switches. A relatively cool way to equip your own circuit with an input option is the rotary encoder. At first glance, a rotary encoder looks like a potentiometer. In […]
  • HowTo: ESPEasy – Connect the PCA9685 PWM port extension to the ESP8266
    The PCA9685 is quite a practical IC. This is connected to the microcontroller (e.g. ESP8266) via I2C and can then control up to 16 individual PWM channels. You can control up to 16 LEDs, servos or motors with additional circuitry with just two (I2C) pins on the microcontroller. Especially when you want to control servos, […]
  • HowTo: Node Red – Control Spotify via NodeRed
    What I really appreciate about Spotify is the good connectivity. You can play or control music or podcasts on another device with just a few clicks. Thanks to the free possibility of setting up developer access, many of these functions can also be accessed from NodeRed. With a few cleverly linked nodes, you can easily […]
  • HowTo: Node Red – Display close by gas station prices on the dashboard
    Mit NodeRed bzw. den passenden Nodes könnt Ihr sehr leicht Daten aus dem Internet abrufen und aufbereitet anzeigen lassen. Ein praktischer Anwendungsfall dafür ist zum Beispiel der Abruf von Tankstellenpreisen aus der Umgebung und die automatische Darstellung in einer Tabelle. Der Webdienst Tankerkoenig.de bietet seine Daten netterweise kostenlos zum Abruf über seine API an. Mit […]
  • HowTo: Arduino – Build your own arduino timer “time_timy” to visualize a time period
    The 3D printed housing of the “pxlDigits” was initially not intended to be “just” a 7-segment display with WiFi. Originally I used it to build a kind of timer from a two-digit, 7-segment display for a friend of mine. She is a primary school teacher and had the problem that she needed a time display […]
  • HowTo: Electronics – Build seven segment LED digit called “pxlDigit” from WS2812 LEDs
    For another project I urgently needed a relatively large number to indicate a duration. From this this small “sub-project” emerged. Because with the 3D printed frame described here and a couple of WS2812 LEDs you can easily build a seven-segment number (or several) and use it to build displays to show numbers. Over time, I […]
  • HowTo: ESPEasy – Connect an LDR to the ESP8266 and read its value
    There are some situations in which connecting an LDR to an ESP makes sense. In this way, the brightness in a room can be measured relatively easily and for little money. This value can then be used, for example, to detect presence (has someone switched the light on even though I’m not at home?) Or […]
  • HowTo: pxlBlck – Display relative values as a BarGraph
    I started with the documentation of the pxlBlcks (which I had been postponed for a too long time) in November 2020 after Hackaday.com had announced the “GoodBye 2020” challenge. (More information here: https://hackaday.io/contest/175608-goodbye-2020/details) I had used the pxlBlcks for a long time, but as so often I never found the time / motivation to write […]
  • HowTo: 3D printing – Build a foot tambourine yourself
    Actually not one of the typical articles for Nerdiy.de, but recently I was looking for a tambourine that I could operate myself while playing the guitar. Long story short: Everything I found was either too expensive or not suitable. Therefore: do it yourself. 🙂 Instructions on how to build your own foot tambourine can be […]
  • HowTo: 3D printing – Build a foot rattle yourself
    When looking for a foot rattle to accompany guitar playing, I had the same problem as with the foot tambourine. So again: do it yourself. 🙂 Instructions for building your own foot rattle can be found in the following article. Inhalte1 Requirements2 Collect the parts you need3 Print the required parts4 Attach the elastic band5 […]
  • HowTo: pxlBlck – Build your own pxlBlck_RingClock
    The pxlBlck_RingClock is very similar to the pxlBlck_SlotClock. It is also built using a 1 × 60 LED matrix and can display the time according to the same scheme as the pxlBlck_SlotClock. However, the LED strip of the pxlBlck_RingClock is installed in a ring and not in a disc. This makes the design of the […]
  • HowTo: pxlBlck – Build your own pxlBlck_8x8
    The pxlBlck_8x8 was one of the first members of the pxlBlck family. Thanks to the few parts and the prefabricated WS2812 8×8 LED matrix, it is set up fairly quickly and thanks to the adapter board, it offers some expansion options that are not visible at first glance. With the help of the installed pxlBlck […]
  • HowTo: pxlBlck – Build your own pxlBlck_Pot
    The idea for the pxlBlck_Pot is heavily inspired by a design that Lukas (@i_am_lukas) had created. He agreed that I can use his basic design. Thanks again for that. 🙂 The pxlBlck_Pot is basically a 3D printed flower planter. A 32×8 WS2812 LED matrix can be inserted into this. The functionality of the pxlBlck can […]
  • HowTo: pxlBlck – Build your own pxlBlck_SlotClock
    The pxlBlck_SlotClock consists of a 1×60 LED matrix. It can display the time in the same way as an analog clock. The colors of the individual hands can be adjusted. Hour markers can also be displayed. This makes orientation and reading the time a little easier. 🙂 Animations can also be shown on the LED […]
  • HowTo: pxlBlck – Design icons, transfer them to the pxlBlck and display them
    I started developing the pxlBlcks because I was looking for a way to stay informed about events in the SmartHome. There are now two options integrated into the pxlBlck plug-in. In addition to being able to display animations, there is also the possibility of loading predefined icons onto the pxlBlck and displaying them there. These […]
  • HowTo: pxlBlck – Install and configure the pxlBlck plugin
    The pxlBlck plugin for the ESPEasy framework is the “software counterpart” to the pxlBlck platforms. With the plugin you can easily control the built-in LED matrices and with the help of the other functions it is relatively easy to display your own animations and notifications on the LED matrix. Inhalte1 pxlBlck platform2 Installation of the […]
  • HowTo: pxlBlck – Commands to configure the pxlBlck
    The pxlBlck plugin and the functions of your pxlBlck can be configured in two different ways. One possibility is to configure most of the functions via the plugin’s web menu. You can find a lot of information about this in the article pxlBlck – Install and configure the pxlBlck plugin In addition to this option, […]
  • HowTo: pxlBlck – Configure and display animations
    With the pxlBlck you can be informed about events in different ways. One of these possibilities is to be able to display previously set icons. Unfortunately, this option only works on LED matrices with a height greater than one, i.e. not on the pxlBlcks which “only” use an LED strip or a 1×60 LED matrix. […]
  • HowTo: pxlBlck – Configure watch faces and screensavers
    The adjustable dials differ from the type of LED matrix used. Unfortunately, this is the case because different LED-matrix sizes allow or do not allow different dials and screensavers. In order to give you a small overview of which dials are possible with which matrix, here is an idea of the adjustable dials and the […]
  • HowTo: pxlBlck – Automatic setting of the display brightness via LDR
    If you not only want to stay informed about events with your pxlBlck and also use it to display the current time, then it might be you noticed that a fixed display brightness doesn’t always match to every situation. Especially if you have your pxlBlck near a window, you have to set the display brightness […]
  • pxlBlck – An IOT/SmartHome information system
    pxlBlck is a system of hardware and software to set up an information system for the SmartHome. Various software and hardware options are available. Thanks to the integration in an ESPEasy plug-in, the pxlBlck’s can be automated without external automation software. In combination with external automation software (e.g. NodeRed, MQTT server, etc …), various notifications […]
  • HowTo: ESPEasy – Activate NTP time retrieval from the Internet
    Thanks to WiFi and thus (often) an internet connection, an ESP8266 or ESP32 programmed with ESPEasy also has the option to retrieve the actual time. In order for this to work, the retrieval of the time via an NTP server must first be activated in ESPEasy and a correct server configured. What you have to […]
  • HowTo: Electronics – Build waterproof 12V fairy lights yourself
    For a camping trip I was looking for a cheap and bright fairy light. This should be waterproof and bright enough to illuminate the tent properly. It would be perfect if the brightness could be adjusted. Since I didn’t find any of the existing fairy lights really fitting, I started to “develop” my own fairy […]
  • HowTo: Electronics – Encapsulate electronics waterproof with epoxy
    During the construction of a chain of lights, I was faced with the problem of how to get this chain of lights waterproof. Ultimately, I built the electronic components, which must not be exposed to moisture, in a 3D printed transparent housing. In order for them to be finally waterproof, the electronic components had to […]
  • PCB development – hubCtrlr, miniFloorLamp and nanoPxlV1.3
    Lately I’ve been working on various PCB projects and I would like to introduce a few of them here. Inhalte1 i2c_slider_752 miniFloorLamp PCB3 nanoPxl V1.34 hubCtrlr i2c_slider_75 With this PCB I want to reduce the wiring effort of WinDIY a little. The last build of the electronics (from WinDIY) consisted of a main board which […]
  • HowTo: Node Red – Fridge door monitoring by fridge energy consumption
    In the past few weeks I’ve had the problem that my freezer door didn’t close properly. As a result, at least one night, the refrigerator door was not properly closed for almost seven hours. When that happened to me (again) a few days later, I decided to do something about it. It would be enough […]
  • HowTo: ESPEasy – Use a PCA9685 and ESPEasy to control servos
    The PCA9685 is a PWM port expander. This makes it possible to connect up to 16 LEDs, servos or other components to your ESP8266 and supply them with a PWM signal. Thanks to ESPEasy (and the matching plug-in), controlling the PCA9685 is particularly easy. With the PCA9685, you can ultimately control up to 16 servos […]
  • How To: Raspberry Pi – Configure audio output
    The RaspberryPi can be equipped with a speaker in various ways. The easiest way is the connection via the 3.5mm jack plug. There is also the option of having the sound output via the HDMI connection. Ultimately, the sound can also be output via a connected USB speaker. This is particularly useful if you want […]
  • HowTo: Raspberry Pi – Use a Raspberry Pi with “Raspotify” as a Spotify speaker
    In the article RaspberryPi – Install “Shairport” Airplay-server on the RaspberryPi, I described how you can easily expand your RaspberryPi with the function of an AirPlay speaker. Thanks to another cool open source project, it is also possible to use your RaspberryPi as a Spotify speaker. All you need is a connected speaker, the appropriate […]
  • HowTo: Raspberry Pi – Install “Shairport” Airplay server on the Raspberry Pi
    Anyone who uses one (or more) Apple devices is certainly familiar with the AirPlay function. Thanks to this, media of all kinds can be streamed to other devices in the network. You can display photos on an AirPlay-enabled television, play videos or play music on AirPlay-enabled speakers. At least the latter can be easily achieved […]
  • HowTo: Tasmota – Flash Tasmota firmware to Sonoff iFan03 module
    There are some practical modules in the Sonoff range. This also includes the “Sonoff iFan03”. This is actually intended to be able to control ceiling fans and a connected lamp via remote control and WLAN. Like many other Sonoff modules, the iFan03 module can also be equipped with the free Tasmota firmware. How you can […]
  • HowTo: Node Red – Pushbullet notification at SSH login
    From the FritzBox I am used to being notified as soon as someone logs on to my FritzBox. I think that’s a great security feature. At some point I thought it would be nice if this feature were also available for the RaspberryPi. So I put together the solution below. When a login is recognized […]
  • HowTo: Tasmota – Flash Tasmota firmware using Tuya-Convert
    Flashing devices with the ESP8266 is already described in the article ESP8266 – Flashing .bin files under Windows with the “Esptool”. But many ready-made SmartHome devices such as various sockets offer a somewhat more convenient way of flashing an alternative firmware (for example Tasmota) without a soldering iron. All you need is a RaspberryPi and […]
  • Tasmota – Configure shut-off delay for relay-output
    Letting a relay run with a shut-off delay is actually a function that is used quite often. Unfortunately (at least until today) this is not so easy to implement with the Tasmota relays. A practical application for a shut-off delay is, for example, a bathroom fan.A bathroom fan is often paired with the bathroom light […]
  • HowTo: Node Red – Control FritzBox thermostat via Node Red
    I recently ordered one of the DECT radiator thermostats for the FritzBox out of curiosity. As usual with Fritz products, installation and commissioning were super easy. You don’t even need ten minutes for the installation. All kinds of options can then be set in the app and the FritzBox interface. Among other things, fixed times […]