Werkstatt

pxlBlck


Node Red


ESP Easy



3D Druck


Raspberry Pi



Alle Beiträge

  • 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 […]
  • HowTo: Node Red – Restart FritzBox via NodeRed Dashboard
    It doesn’t happen often, but sometimes restarting the FritzBox helps to fix problems in the network or with the internet connection. There are different ways to restart the FritzBox. You can log into the configuration interface of the FritzBox and trigger a restart via the corresponding menu entry, briefly disconnect the FritzBox from the power […]
  • HowTo: Electronics – nanoPxl V1.1 soldering SMD components
    I am currently working on the first preparations for a somewhat larger project. For this I need LEDs which shine a little brighter. At the same time, I didn’t want to forego the comfort of the well-known WS2812 aka Neopixel LEDs. For those who haven’t heard of it yet: These have the great advantage that […]
  • HowTo: Node Red – Automatic saving of the Node Red journal after starting Node Red (for debugging purposes)
    I recently had a problem with NodeRed that caused the NodeRed process to crash sometimes. Not really that bad because it is restarted automatically. On the other hand, it annoyed me at some point because the data in the dashboard view was lost and status messages were sent every time. So it was time to […]
  • HowTo: Node Red – View Linux login history
    It is known that almost all Linux commands can be executed with the help of NodeRed. What makes the whole thing particularly practical, however, is that you can then also process the returned data with the help of NodeRed. In the following article I use this to read the last Linux logins on my RaspberryPi […]
  • Nerdiskerator – Generator from the 3d printer
    A few days ago I posted the building instructions for a project of mine: WinDIY a 3D printed wind turbine. Even if I still have some work ahead of me, most of the functions of WinDIY are already working. What unfortunately has not yet worked is the main purpose of a wind turbine: generating energy. […]
  • News: PCB development – genCtrlr and nanoPxl
    Since I’ve started two new PCB projects lately, I thought it was time to write about them again. Inhalte1 genCtrl aka “NerdiskeratorController”2 nanoPxl – WS2812/SK6812 aka Neopixel-LED in bigger genCtrl aka “NerdiskeratorController” One of the side projects that arose from WinDIY and the Nerdiskerator is the controller board that I use to monitor the various […]
  • WinDIY – The wind turbine from the 3D printer
    On a camping trip away from modern infrastructure, you quickly notice how much you have gotten used to the fact that electricity is somehow available anytime and anywhere. The stupid: Most of the time you will realize this when the electricity is not there. For this case there are now power banks. But what if […]
  • HowTo: Nerdiskerator – Build the brake actuator
    The generator is held by a bracket in which a brake actuator is also integrated. In the following article you will find how you can proceed with its construction. Collect the parts you need You need the parts shown to assemble the brake actuator. For the assembly of just one actuator that follows, you only […]
  • HowTo: WinDIY – Assembling the prepared components
    So that the construction articles for WinDIY do not become too extensive, I have divided the construction into several articles. A certain component such as the wing built. Of course, these individual components have to be brought together at some point. This is what this article is about. This article is intended to support you […]
  • HowTo: WinDIY – Assemble the windvane
    The WinDIY wind vane is mounted at the end of the device carrier. It should help to align the wind turbine always in the direction of the wind. How you can set up the wind vane is described in the following article. Inhalte1 Requirements2 Collect the parts you need3 Assemble frame parts4 Assemble the base […]
  • HowTo: WinDIY – Assembling the pitch actuator
    One component that is supposed to make WinDIY more secure is the pitch actuator. It allows the wing’s angle of attack to be changed via a push rod. In case of an emergency (e.g. if the speed is too high) the angle of attack can then be changed so that the wind can no longer […]
  • HowTo: WinDIY – Build the turret mount
    The turret supports the turbine and the superstructure on the standpipe so that it can be rotated 360°. A slip ring is also integrated in it to transfer the generated energy to the non-rotating part of WinDIY. How you can proceed building the turret is described in the following article. Inhalte1 Requirements2 Collect needed parts3 […]
  • HowTo: WinDIY – Assemble the main axis
    The main axis is the axis in which the wind turbine will later rotate. It must therefore bear the weight of the blades including the hub and at the same time absorb the forces generated by the wind. Last but not least, it should rotate smoothly. A critical task and in my opinion one of […]
  • HowTo: WinDIY – Build the hub including mechanics
    At one point or another I have probably already mentioned that it was important to me to be able to control WinDIY safely and to be able to limit its speed in an emergency. This is why I developed a mechanism which allows to adjust the angle of attack of the wings. So the wings […]
  • HowTo: WinDIY – Assemble the Wind Turbine’s Wings
    An important component of WinDIY are certainly the wings. They absorb the energy of the wind and convert it into a rotary motion, which in turn feeds the generator and thus produces energy. Of course, the wings should be as light as possible. At the same time, however, they should be stable enough to withstand […]
  • HowTo: Raspberry Pi – Rotate screen output
    Especially if you have connected an external screen, it can happen that you are faced with the problem of wanting to rotate the screen output. A typical use case is, for example, when you use your RaspberryPi to build a MagicMirror. For this purpose, the screen is often hung up rotated by 90 °. Now […]
  • HowTo: Node Red – Shut down and restart Raspberry Pi
    Eine weitere praktische Sache in NodeRed ist, dass man auch übliche Linux Befehle bequem per NodeRed-Node auslösen kann.
  • HowTo: FritzBox – Fix the “TypeError: Cannot read property ‘actions’ of ‘undefined’” error in the “node-red-contrib-fritz” node
    For some time now I have had the problem that my “node-red-contrib-fritz” node cannot connect to my FritzBox. What confused me: Nothing really changed in the entire configuration before the error occured.. Nothing but the firmware version of FritzOS, the FritzBox operating system. At first I thought that AVM would have deactivated the interface that […]
  • Review: PCB Service of PCBWay.com
    It’s been a while since PCBWay asked me to test their PCB manufacturing service. This was a perfect opportunity to have the circuit board for the “mobileSupply” project manufactured . “mobileSupply” is supposed to be a kind of power bank for the bike. The special thing about it is that this power bank can also […]
  • News: Summer 2020
    Dear visitor of Nerdiy.de, I’ve decided to post a little update from time to time (probably four times a year) about what’s going on in the background on Nerdiy.de. This is my first entry. So of course I would be happy to receive any critic. Let me know what else interests you or what you […]
  • pxlBlck – Alle Infos für Tester des neusten Pre-Release
    Liebe Tester,zu allererst vielen Dank, dass Ihr Euch bereit erklärt habt das pxlBlck Plugin zu testen. 🙂 Im folgenden versuche ich alles aufzulisten, dass Ihr für die Installation und den Betrieb des Plugins benötigt. Wenn etwas fehlt erwähnt das bitte einfach in der Kommtnarfunktion ganz am Ende der Seite. 🙂 Inhalte1 Voraussetzungen2 Installation des Plugins3 […]
  • HowTo: ESPEasy / Wemos D1 Mini – Adapt ADC to another maximum voltage
    You can measure voltages using the ADC on the ESP8266. This is useful, for example, to measure a battery voltage and thus the state of charge of the battery or a brightness using an LDR and a series resistor. The ADC of the ESP8266 is somewhat special. Without additional external wiring, this can unfortunately only […]
  • HowTo: ESPEasy – Connect VL53L0X / VL53L1X distance sensor to the ESP8266 / ESP32 and read its data
    I recently stumbled across the VL53L0X and VL53L1X TOF distance sensors. These sensors can determine distances with millimeter accuracy using a laser. In addition, they have a range of up to 4m (VL53L1X9 or 2m (VL54L0X). I found the sensors very interesting and of course I ordered a few directly. It doesn’t hurt to have […]
  • HowTo: Mechanics – Cut internal thread
    Whenever possible I try to use finished nuts or thread inserts when using screws and the like. But sometimes there is simply no other way and you have to cut a thread into a material yourself. 🙂 That sounds a bit complicated at first but is really not difficult. Here comes a small series of […]
  • Code snippet: Arduino – Activate I2C broadcast reception
    I2C is the bus protocol or technology via which a microcontroller can communicate with many sensors or actuators. Thanks to the right software, you can also connect and communicate with different microcontrollers. There is usually only one master per I2C bus that can request or send data from a slave via the corresponding address. In […]