Arduino UNO NRF24L01+ Shield is specially design to add wireless connectivity to Arduino UNO.

This shield is design to make MySensors available to people with basic hardware knowledge and skills. Its saves time and avoid messy wiring connections.

Is easy to use just stack the shield on the top of the Arduino UNO connect NRF24L01+ to the shield upload MySensors code, that it.

Known issues with the design:

1. One of the mounting holes are not aligned to Arduino hole, will be changed in future.
2. The SMD pads for NRF24L01+ are not comparable for all NRF24L01+ modules. Different vendors have different pinout of this modules. Link for compatible SMD modules will be provided.

Be advised this shield cannot be used as MySensor Ethernet Gateway, the wiring are different. There exist other project for gateway. https://www.openhardware.io/view/695/Arduino-Uno-Radio-Shield-SerialEthernet-GW

The shield use this pins of the Arduino UNO:

Pin D2 NRF24L01 IRQ

Pin D9 NRF24L01 CE

Pin D10 CSN

Pin D11 MOSI

Pin D12 MISO

Pin D13 SCK

The Pins D10 to D13 is 4wire SPI interface. On the theory those pins can be used to connect another SPI device on the interface, i never test more than one device on the SPI line.

Pin D2 is IRQ is a Interrupt Request Line to the micro-controller.

Pin D9 is Chip Enable for the NRF24L01 Module.

Pins D2 and D9 cannot be used for other devices and sensors.

Related Projects: https://www.openhardware.io/view/636/Raspberry-PI-Hat

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  mfalkvidd commented 6 years ago
  

  @tiana I have not used it, but it is possible to create different revisions. See https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors#tabs-revisions as an example.
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  tiana commented 6 years ago
  

  Hello,

  Even without capacitors work well, for all of my sensors. With the capacitor only the range is little bit increased.
  The SMD version of the NRF module works only for some vendors, there exist different pinout of those NRF modules.
  Also there have one issue with the design, the one of the mounting holes are not align to Arduino hole at the moment i work to fix this, after fixing the gerbers will be updated.

  I don't like one think here in openhardware.io there haven't project versions and when some change is made cannot be visible as changed, if somebody had already download the gerber files, will have old version of them and is not be alerted for new design change.

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  tbowmo commented 6 years ago
  

  @boozz said in Arduino UNO NRF24L01+ Shield:

  @tbowmo

  You mean this item?:
  

  I never used the CE pin via a level converter up till now. I use 3 of them and some have ran for over 3 years now. So I guess they must be 5V tolerant.
  Of course, power pin should be 3v3.

  Yes..

  Some of the chinese modules, have the CE pin wired to the PA/LNA chip RXEN, which is not 5V tolerant, like the NRF24 are. So it is not safe to assume that it is OK to just apply 5V to the input pins.

  You are just lucky, that the designer of the radios that you are using, didn't do this..

  You should always check the datasheet from your vendor, as they might do things that are less than ideal

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  boozz commented 6 years ago
  

  @tbowmo

  You mean this item?:
  

  I never used the CE pin via a level converter up till now. I use 3 of them and some have ran for over 3 years now. So I guess they must be 5V tolerant.
  Of course, power pin should be 3v3.

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  tbowmo commented 6 years ago
  

  The design assumes that the 3v3 on the arduino board is enough to power the NRF24, which it isn't on the cheap china clones.

  Also be aware that if you add a high powered NRF24 with PA/LNA onboard, the LNA is not 5V tolerant, and you need to have a level converter on the CE pin (if I remember right)

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  boozz commented 6 years ago
  

  @mfalkvidd
  I think you’re right. I only had a look at the first image and there the C1 location was not visible as the nrf-module was in front of it.
  My bad

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  mfalkvidd commented 6 years ago
  

  @boozz isn't that what C1 is for?

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  boozz commented 6 years ago
  

  @openhardware-io
  Looks as a nice and clean design. Too bad you didn't place a capacitor near the power pins of the nrf24L01+ module.
  With my UNO I only got this module working when adding the capacitor...