RF Channel Frequency. The nRF24L01+ transceiver module transmits and receives data on a certain frequency called Channel. Also in order for two or more transceiver modules to communicate with each other, they need to be on the same channel. This channel could be any frequency in the 2.4 GHz ISM band or to be more precise, it could be between 2.400 to 2.525 GHz (2400 to 2525 MHz) nRF24L01 Six Channels To One Receiver Posted on May 25, 2010 by itead & filed under Application Notes. nRF24L01 supports multi-channel data receive, so you can use several nRF24L01 node to transmit data to a terminal receiver. We have built a sensor network demo, which use 6 sensor node and send the data to one receiver The nRF24L01 channel spacing is 1 Mhz which gives 125 possible channels numbered 0.. 124 The nRF24L01 channel spacing is 1 Mhz which gives 125 possible channels numbered 0.. 124. WiFi uses most of the lower channels and we suggest using the highest 25 channels for nRF24L01 projects. Transceivers like these both send and receive data in 'packets' of several bytes at a time The nRF24L01 internally uses pipes as a method of separating data from different devices into distinct feeds that you can read from. It is merely for convenience. You can open up to 6 pipes at once, each one receiving from a different address. All pipes are in the same channel though since you can only tune to one channel at a time
How to build a remote control 7 channel from nRF24L01 and Arduino. This remote control is possible to have more than 7 channel, but in this occasion I will s.. (MegaHz). The nRF24L01 channel spacing is 1 Mhz which gives 125 possible channels numbered 0. 124. WiFi uses most of the lower channels and we suggest using the Arduino Arduino Arduino Arduino 1 In this video I show how to find empty channel... NRF24L01 chips use the 2.4GHz band. This band is used by many other devices like Access Points or Smartphones Beim nRF24L01+ handelt es sich um einen single Chip Transceiver von Nordic Semiconductor. Dieser Chip kann also sowohl als Sender (TX) als auch als Empfänger (RX) arbeiten und bietet eine Reihe von sehr praktischen Features wie Ultra Low Power (nur 900nA in Power Down Modus), 6 Data Pipes beim Betrieb als MultiCeiver, Enhanced Shockburst (dazu später mehr), Automatic Packet Handling, SPI.
I have tried Frequency (Channel) Hopping with the Auto Acknowledgement feature of nrf24l01 so that I can change the frequencies on both Tx and Rx devices in synchronism. Sometimes there is a loss of synchronism (possible different latencies of the mcus [atmega328p] ).In that case, I manually set them using Serial of Arduino IDE It has 125 different channels. Pinout. The nRF24L01 module works with the Arduino through the SPI communication. The pinout of the module is as follows. The operating voltage of this module is from 1.9 to 3.6V but the other pins are 5V tolerant which means that the other pins can be directly connected to the Arduino. The MOSI, MISO and the SCK are the SPI pins and these needs to be connected. nRF24L01 is a single chip radio transceiver for the world wide 2.4 - 2.5 GHz ISM band. The transceiver consists of a fully integrated frequency synthesizer, a power amplifier, a crystal oscillator, a demodulator, modulator and Enhanced ShockBurst™ protocol engine. Output power, frequency channels, and protocol setup are easily programmable through a SPI interface. Current consumption is very. The instruction How to build 8 Channel Transmitter nrf24l01 Arduino introduce how to make 8 channel transmitter from 4 channel RC plane.All existing electronic boards had been taken off,remaining 4 potentiometers of each control channels would be used after and adding new 4 potentiometers for more 4 control channels
NRF24L01+, a popular 2.4GHz RF wireless Transceiver Module among Arduino Users. Regarded highly for its cost to performance ratio, it features specs that's one of the best in its league. This blog aims to explain what it's capable of, alongside an NRF24L01 Arduino Guide The nRF24L01+ is designed for operation in the world wide ISM frequency band at 2.400 - 2.4835GHz. To design a radio system with the nRF24L01+, you simp ly need an MCU (microcontroller) and a few exter- nal passive components. You can operate and configure the nRF24L01+ through a Serial Peripheral Interface (SPI) Der Addicore nRF24L01 ist eine 2,4 GHz ISM-Band-Sender-Empfänger. Die Sender-Empfänger besteht aus einem vollig integrierten Frequenz-Synthesizer, einem Powersverstärker, einem Quarzoszillator, einem Demodulator, einem Modulator, einer verstärkten ShockBurst und der Protokoll-Moto The NRF24L01 is one of the cheapest wireless transceiver modules in the market, you can easily grab one online for less than USD2! Ease of Pairing with Microcontroller/Arduino Board. The nRF24L01 can be easily paired with a variety of microcontroller systems; MCU/ARM/PIC/AVR/STM32 by using the SPI protocol or an RF24 library when pairing with Arduino NRF24L01 Module is a transceiver module, which means it can both send and receive data. NRF24L01 works in 2.4 GHz frequency and uses GFSK modulation. The maximum speed of data transmission of this module is up to 2Mbps and the maximum board is 100 meters (for models with an external antenna the board can be 1 km) in free space
These RF modules are very popular among the Arduino tinkerers. The nRF24L01 is used on a wide variety of applications that require wireless control. They are transceivers which this means that each module can transmit and receive data. These modules are very cheap and you can use them with any microcontroller (MCU) I used an NRF24L01+ attached to an Intel Galileo Gen2 to do an RF channel scan in an effort to identify a good choice for a channel that will best avoid interference. The program repeatedly changes channel and monitors the Received Power Detect Bit (Register 9). The program ran for and hour and counted up the number of times the RPD bit was 1 for each of the 128 channels and produced an output like this Das Tutorial soll den Einstieg, eine Funkstrecke mit dem nRF24L01+ aufzubauen, erleichtern. Beim nRF24L01+ handelt es sich um einen single Chip Transceiver von Nordic Semiconductor. Dieser Chip kann also sowohl als Sender (TX) als auch als Empfänger (RX) arbeiten und bietet eine Reihe von sehr praktischen Features wie Ultra Low Power (nur 900nA in Power Down Modus), 6 Data Pipes beim Betrieb als MultiCeiver, Enhanced Shockburst (dazu später mehr), Automatic Packet Handling, SPI. The channel should be set after the other parameters. I put the set channel. instruction just before the poweruprx line in nrf24.c It is now on line 63 and working. fine. Maybe you can put it there in your codebase as well, just in case people want. to change the channels. This is probably also true for your code. JJ
The VCC and GND pins of the NRF24L01 Transceiver module are connected with the Arduino's 3.3V and Ground pins. A decoupling capacitor of 10uf is connected between the power supply pins. For the best performance, you can use a dedicated 3.3V power supply. For the 3.3V regulated power supply, you can use the AMS1117 voltage regulator. The CE pin is connected with the Arduino's pin number 9, the CSN pin is connected with pin 10, SCK is connected with Pin 13, MOSI is connected. Here is a The NRF24L01 pins Connection with Arduino for both circuits: MISO connects to pin 12 of the Arduino UNO MOSI connects to pin 11 of the Arduino UNO SCK connects to pin 13 of the Arduino UNO CE connects to pin 8 of the Arduino UNO CSN connects to pin 9 of the Arduino UNO GND and VCC of the NRF24L01 are connected to GND and 3.3V of the Arduino UN This is basically a portable version of the poor mans scanner based on nrf24l01. I added an lcd display and used the custom charecters to draw a simple bar graphs to show the signal intensities. it was a bit tricky to use the spi pins with the dfrobot keypad shield (some fuzz with the digital pin 10 which is messsed up in the shield). Using a software spi with the nrf24l01 module didn't work as expected. So i ended up bending the D10 pin on the shield :) and using hardware spi with the nrf. The nRF24L01+ transceiver module communicates over a 4-pin Serial Peripheral Interface (SPI) with a maximum data rate of 10Mbps. All the parameters such as frequency channel (125 selectable channels), output power (0 dBm, -6 dBm, -12 dBm or -18 dBm), and data rate (250kbps, 1Mbps, or 2Mbps) can be configured through the SPI interface NRF24L01 Module. The NFR24L01 is a transceiver module which means that it can both send and receive the data. These modules are very cheap, smaller in size and has a lot of specifications. Some of the specifications of these modules are as follows
No external loop filter, resonators, or VCO varactor diodes are required, only a low cost ±60ppm crystal, matching circuitry, and antenna. The nRF24L01+ is available in a compact 20-pin 4 x 4mm QFN package. nRF24L01+ has 6 data pypes. This means, that can receive data simultaneously from 5 nRF24L01+ In this Arduino project, we will learn about the nRF24L01 Transceiver Module, its features, specifications and finally how to enable Arduino Wireless Communication using the nRF24L01 Transceiver Module. Introduction Almost all the communication in the World today is wireless (at least from the end user perspective). You can find some sort of wireless communication [ The nRF24L01+ and the ESP8266 ESP-01 share similar form factors and pin layouts (and even look the same from afar!) but are controlled and function quite differently. In this tutorial, we hope to introduce the fundamentals of using this RF module, while also explaining how it communicates with other RF modules and microcontrollers. For the purposes of this tutorial, we'll be demonstrating.
the channels that BLE use are limited to the following three: 2.402 GHz, 2.426 GHz, and 2.480 GHz. We have provided a tuple of these specific channels for convenience (See BLE_FREQ and hop_channel()). crc is disabled in the nRF24L01 firmware because BLE specifications require 3 bytes (crc24_ble()), and the nRF24L01 firmware can only handle a maximum of 2. Thus, we have appended the required 3. The nRF24L01+ transceiver module communicates over a 4-pin Serial Peripheral Interface (SPI) with a maximum data rate of 10Mbps. All the parameters such as frequency channel (125 selectable channels), output power (0 dBm, -6 dBm, -12 dBm or -18 dBm), and data rate (250kbps, 1Mbps, or 2Mbps) can be configured through SPI interface
Programmed controller ATmega328P-PU for the receiver using NRF24 radio module. Control your RC plane, boat or car with this remote control project. You can use 4 servo's with each remote. Available products: 150408-1 PCB, revision 1.1 (Nrf24l01 sende .4GHz RF Wireless Modules are RF transceiver modules that can be used for wireless communications at up to 1100 meters. PACKAGE INCLUDES: nRF24L01+PA+LNA 2.4GHz RF Wireless Module; SMA Antenna; KEY FEATURES OF NRF24L01+PA+LNA 2.4GHZ RF WIRELESS MODULE: 2.4GHz Operating Band; 1100 meters Operating Range; 125 RF Channels The nRF24L01 transceiver module transmits and receives data at a certain frequency band called as a channel. If multiple NRF24L01 transceiver modules have to communicate with each other, they must be configured as the same channel. This channel could be at any frequency in the 2.4 GHz ISM band. Each channel occupies a bandwidth of less than 1MHz. This gives us 125 channels with 1MHz bandwidth.
NRF24L01 Audio Communication. For testing, it's useful to have two separate instances of the Arduino IDE open, as we demonstrated using Bluetooth communication. This setup allows you to view and modify both pieces of code at once. You can also access the Arduino software from a desktop shortcut or file folder, instead of through the open Arduino IDE's File-New dialog. Caption: LLL. This channel frequency lies in the 2.4 GHz ISM band or between 2.400 to 2.525 GHz (2400 to 2525 MHz). Each channel occupies a bandwidth of less than 1MHz. It gives us precisely 125 possible channels with 1MHz spacing i.e, (2525 - 2400)/1 = 125 channels. nRF24L01 module Connection with Arduino I believe I didn't now how to properly articulate my question. What I'm trying to build was a packet sniffer. All I need is just the pipe address of any 2.4ghz transceiver. So, far I was able to use Node.js to build a channel scanner, so I can find all used channels in close proximity. But apparently this is as far as I can take nRF24L01. I. • The nrfL2401+ can operate on channels between 2.4 GHz and 2.525 GHz • Channels while running at <1Mbps require minimum spacing of 1 MHz • Channels while running at 2 Mbps require minimum spacing of 2 MHz Monday, August 23, 201
DS18B20, nrf24l01, stc15l204 in mailbox outside, another device in house. rx via nrf24l01 and Raspi Parts List nRF24L01+ DS18B20 Temperature Sensor I2C LCD display 16×2 Arduino UNO 4.7k resistor Library nRF24L01 Library RF24 Library DallasTemperature Library LiquidCrystal_I2C Library Wire Library Wiring Wire nRF24L01+ to Arduino UNO GND GND VCC Arduino 3.3V CE Arduino pin 9 CSN Arduino pin 10 SCK Arduino pin 13 MOSI Continue reading Multiple Nodes nRF24L01+ Wireless Temperature DS18B20. Wifi channel 6, occupying 2426-2458 MHz, could adversely affect an nRF24L01+ operating at any channel between 26 and 58. In the US, license-exemption for the 2.4 GHz band applies only to emission between 2400 MHz to 2483.5 MHz. At 2 Mbps, you'll want to stay between channel 1 and channel 82. At 1 Mbps or 250 kbps, you can also use channel 83. Wifi in the US is, as you know, limited to channels. In the context of the NRF24L01 a channel is a ~1 MHz band within the 2.4 GHz spectrum that it uses for digital communication. Within any given channel you tell it to work on you also have multiple addresses that the device can be set to transmit to and receive from - the idea is that this way you can have multiple devices on the same channel but they will ignore messages that aren't addressed. The nRF24L01+ are low power RF transceiver modules that can be used for wireless communications at up to 100 meters. PACKAGE INCLUDES: nRF24L01+ 2.4GHz RF Wireless Module; KEY FEATURES OF nRF24L01+ 2.4GHz RF WIRELESS MODULE: 2.4GHz Operating Band; 100 meters Operating Range; 125 RF Channels; 250Kbps - 2Mbps Data Rates; 3.3V Operatio
flow sensor data - nrf24l01 flow sensor on ThingSpeak - ThingSpeak is the open IoT platform with MATLAB analytics. Toggle navigation. Sign In; Channels; Apps; Support. Documentation; Tutorials; Examples ; Community Support; Commercial Use; How to Buy; Sign In; nrf24l01 flow sensor. Channel ID: 241960; Author: nrf24l01; Access: Public; flow sensor data. × Export recent data. nrf24l01 flow. . nRF24L01 wireless module Arduino Demo. For more information about nRF24L01 wireless module. Everything You Need to Know about the nRF24L01. For nRF24L01-2.4GHz - HowTo and Arduino examples, click here. nRF24L01 with Arduinio's SPI. 4,1 von 5 Sternen. 137. 15,52 €. €15. , 52. WayinTop 2pcs NRF24L01+PA+LNA Sender Empfänger Wireless Transceiver RF Transceiver Module mit SMA Antenne 2.4 GHz 1100m + Breadboard Breakout Adapter Board Kompatibel mit NRF24L01 Modul. 4,2 von 5 Sternen. 78 I happened to run the test on channel 76 of nrf24l01. The choice is weird, but it has the least overlaps with wifi (mine and neighbors). Since I was planning to use those only on that channel I.
Cheapest and most popular RF transceiver than ever. The nRF24L01 is one of the most popular RF transceiver as it is very cheap and it could be found already configured on small PCBs with needed passive components. This means that only a MCU is needed to design a radio system with the nRF24L01.. Description. The nRF24L01 is a highly integrated, ultra low power 2Mbps RF transceiver IC for the 2. 18-feb-2021 - Explora el tablero de Miki Alga NRF24L01 en Pinterest. Ver más ideas sobre electrónica, arduino, circuitos The nRF24L01 transceiver module sends and receives the data on a certain frequency called Channel. While connecting two or more transceiver modules to communicate with each other, they need to be on the same channel. This channel frequency lies in the 2.4 GHz ISM band or between 2.400 to 2.525 GHz (2400 to 2525 MHz)
Saulės Kolektorius. Channel ID: 812214. Author: barsiukas. Saulės kolektorių temperatūra realiu laiku. arduino mega, nrf24l01, ds18b20 Software selectable channel from 2400MHz to 2525MHz (125 Selectable channels) For nRF24L01 datasheet, click here. nRF24L01 wireless module Arduino Demo. For more information about nRF24L01 wireless module. Everything You Need to Know about the nRF24L01. For nRF24L01-2.4GHz - HowTo and Arduino examples, click here. nRF24L01 with Arduinio's SPI Library This means that only a MCU is needed to design a radio system with the nRF24L01. Description. The nRF24L01 is a highly integrated, ultra low power 2Mbps RF transceiver IC for the 2.4GHz ISM band. It provides an hardware protocol accelerator, the Enhanced ShockBurst, enabling the implementation of advanced and robust wireless connectivity with low cost MCUs nRF24L01 channel related. I6believe over 5 years ago. hello,my experiment phenomenon is:one nRF24L01's channel is 0x0A,used as send terminal；the other one nRF24L01's channel is 0x02，used as receive terminal；receive terminal can receive data which from send terminal. i really check the code,the channel value is not changed anywhere,but the phenomenon is still exist.. Driver class for nRF24L01(+) 2.4GHz Wireless Transceiver. Examples Meaning the default channel of 76 uses the approximate frequency of 2476 MHz. Note In the python wrapper, this function is the setter of the channel attribute. To use this function in the python wrapper: # let `radio` be the instantiated RF24 object . radio.channel = 2 # set the channel to 2 (2402 MHz) Parameters. channel.
I'm able to establish a communication channel between two nRF24L01+. But once I kick in a second listener, only one of them gets the message. Funny enough, it's always the same that wins in the situation where two are listening. Is there any way of having multiple receivers (like a broadcast?) Here's the receiving code I'm using for the Arduino I decided it was time for me to play around with wireless communication as I recently purchased a wireless alarm system. I was able to pick up two nRF24L01 wireless modules very cheaply at about $2 each from Ebay. Some features of this chip are: 126 channels; Up to 32 bytes payload data; Up to 2Mbp Der nrf24l01 hat zwar 6 Pipes, diese benötigt man aber (meines Erachtens) so gut wie nicht. Eine Pipe reicht völlig aus. Die Adresse, die du der Pipe vergibst ist eine Art MAC Adresse, also eine physische Adresse. Alle Datenpakete, die an die physische Adresse gesendet werden, werden erstmal grundsätzlich empfangen und dem Microcontroller zur Weiterverarbeitung gereicht. Wenn du jetzt 12. nRF24L01+ module fixed about as well as it can be, by adding an appropriate capacitor on the PCB antenna, and a 1.0 uF capacitor across the power pins for good measure The nRF24L01 is a wireless transceiver module, meaning each module can both send as well as receive data. They operate in the frequency of 2.4GHz, which falls under the ISM band, and hence it is legal to use in almost all countries for engineering applications. The modules when operated efficiently can cover a distance of 100 meters (200 feet) which makes it a great choice for all wireless remote controlled projects
Remote control construction with 6 Channels, proportional controls for model vehicles. Necessary materials: 2 x Arduino Nano 1 x NRF24L01 + PA Wireless Modul Nrf24l01L wireless module, use NRF24l01 IC from Nordic, work at 2.4Ghz worldwild open ISM band, working data speed up to 2 Mbps, 125 channel can reach multiple channel and jumping channel needs, operation voltage 3.3-3.6V, transmit power up to 20 dBm, then sensitivity can reach -86dbm at 2 Mps high speed Adjust the nRF24L01's frequency channel (2.4-2.525 GHz) Adjust the nRF24L01's power amplifier level (0, -6, -12, or -18 dBm) Adjust the nRF24L01's RF data rate (250kbps, 1Mbps, or 2Mbps) An nRF24L01 driven by this library can communicate with a nRF24L01 on an Arduino driven by the TMRh20 RF24 library. See the nrf24l01_2arduino_handling_data.py example. fake BLE module for sending BLE. The nRF24L01 module can be controlled in many ways, one of which is Arduino or Crowduino. We tried and tested it, then made a demo. Let's see how it works with Arduino. 1.Hardware Connection. First of all, of course, you need two Arduino boards and at least two RF modules, one to transmit and the other to receive. 2.Download the code below into the TX Arduino (transmit) — This code will.
The instruction How to build 8 Channel Transmitter nrf24l01 Arduino introduce how to make 8 channel transmitter from 4 channel RC plane.All existing electronic boards had been taken off ,remaining 4 potentiometers of each control channels would be used after and adding new 4 potentiometers for more 4 control channels I have been trrying to learn NRF24L01 but have some doubts. There are Two Transmitters(T1,T2) and Two Receivers(R1,R2) in same vicinity how to make sure the receiver receives only the intended transmitter data. i.e R1 should only pick/listen T1 transmitted data and not T2 transmitted data, similarly R2 should only pick/listen to T2 transmitted data and not T1 transmitted data. I heard something about Transmitter address can you please help me more on this ? And how many addresses. NRF24L01 - Arduino. GND - GND VCC - 3.3v CE - D7 CS - D8 SCK - D13 MOSI - D11 MISO - D12. It's important that the NRF24L01 module's VCC pin is not connected to the Arduino 5v pin as this will damage the NRF24L01 module. It is a 3.3V device. Code. We will write two different Arduino sketches for this project. One of the sketches will be for the transmitter and the other one, for the. The nRF24L01+ module is based on the NRF24L01 transceiver IC from Nordic Semiconductor which operates in the 2.4GHz band with baud rates from 250Kbps up to 2Mbps. It operates with a nominal Vcc of 3.3V and has 5V tolerant inputs. It draws very little current (around 12 mA in transmission mode) and each module can use 125 different channels and each channel can have 6 addresses. This means that. For communication with the Arduino, the NRF24L01 module uses the SPI protocol, plus two additional digital pins. That means we are left with 9 digital pins which can be used as output channels, two of which are the RX and the TX pins. It's worth noting, that these pins must be disconnected from anything while we are uploading a sketch to the Arduino board, so therefore I made it possible to be connected or disconnected through separate pin headers. Actually, we can also use the analog.
You must keep all the parameters the same for the master & slave (channel, speed, pipes etc) or the devices wont communicate. Make one device a slave & the other a master by adding slave() & master on the last line of nrf24l01_test.p It has 125 possible channels in between 1Mhz spacing so the module can use 125 different channels which makes it possible to have a network of 125 independently working modems in one place. Most importantly, NRF24L01 signals don't overlap or cross interface with other walkie-talkie systems like police walkie-talkie and railway walkie-talkie and it does not disturb other walkie-talkies
NRF24L01 with STC C51 MCU. STC15L204EA +NRF24L01 Schematic. Demo Code of STC51 Usage Connect board RX to TX (MCU,PC), and board TX to RX(MCU,PC) Simply use a UART connector (PL2303, FT232RL, CP2102, etc) to connector between PC and this module. To upload C51 demo code, notice the MCU frequency, for default button pressed frequency is 22.1184 mhz, and data transmission demo code frequency is 18. .4Ghz NRF24L01 Module With Arduino | Nrf24l01 4 Channel / 6 Channel Transmitter Receiver for Quadcopter | Rc Helicopter | Rc Plane Using Arduino: To operate a Rc car | Quadcopter | Drone | RC plane | RC boat , we always need a reciever and transmitter, suppose for RC QUADCOPTER we need a 6 channel transmitter and receiver and that type of TX and RX is too costly , so we gonna make one on our
Es handelt sich meistens um Transceiver. Bluetooth kommuniziert über AT-Befehle. Der NRF24L01 ist ein ganz besonderes Gerät mit geringem Stromverbrauch, das über mehr als hundert Kanäle usw. verfügt, jedoch ein einzigartiges proprietäres Protokoll ist. Bluetooth ist ein Standard für die drahtlose Kommunikation, und so weiter. Für einen Benutzer hingegen ist es vielleicht interessanter, wie einfach oder schwierig das Einrichten und Programmieren der Hardware des Geräts ist nRF24L01 is an RF wireless signal chip radio transceiver module for 2.4 GHz ISM band. NRF Module has an inbuilt fully integrated frequency synthesizer, power amplifier, crystal oscillator, demodulator, modulator, and enhanced shock burst protocol engine. It has built-in power down and standby modes which makes power saving realizable. The module is easily programmable through SPI interface and. What\'s more, this nRF24L01+ module is designed with Power amplifier and SMA antenna This allowed you to use the wireless communication up to 1000 meters! (No barrier) Specifications: Frequence: 2.4GHz~2.5GHz Operating voltage: 3 ~ 3.6V Max Current: 115mA Multi-frequency: 125 frequency Support up to six channels of data receptio The nRF24L01 is a single chip radio transceiver for the world wide 2.4 - 2.5 GHz ISM band. The transceiver consists of a fully integrated frequency synthesizer, a power amplifier, a crystal oscillator, a demodulator, modulator and Enhanced ShockBurst™ protocol engine. Output power, frequency channels, and protocol setup are easily programmable through a SPI interface Als nächstes arbeite ich daran, einen NRF24l01 an einen WEMOS D1 mini anzuschließen. Das D1 mini hat zwar von Hause aus ein eigenes 2,4GHz Sende- und Empfangsteil, benötigt zum Betrieb aber immer ein funktionierendes WLAN, was man nicht immer zur Verfügung hat, oder aus gewissen Gründen nicht nutzen möchte. Es gibt verschiedentlich Informationen dazu, aber wie gehabt, alles irgendwie.