RFD22301 is not available (reason: obsolete)

he guys i am trying to make open bci cyton by myself using the schematics  and bom given. but i am stuck in a tough spot as i cant find RFD22301 as they are saying its obsolete. there were other passive components that were not available but i replaced them with another component with similar configuration. so can you suggest an alternate component which will replace RFD22301. and if so then will it be a problem?


https://www.digikey.in/products/en?t=872&v=1562&pv1883=11&pv578=193&pv139=744&pv448=132&pv54=297&pv1884=3


thanks!!

Comments

  • making it wireless is not the priority for me. Making it wired will do fine. what changes should i make in the chip design to make it so?

  • wjcroftwjcroft Mount Shasta, CA
    Mentioning Joel @biomurph.

  • biomurphbiomurph Brooklyn, NY
    @projectcyton1518 Yes, it is the case that the RFD22301 has gone EOL. If you need one, you may be able to find if you search Octopart?

    Regarding making the Cyton in a wired version, we don't officially support or encourage that, because of safety and liability concerns. 
  • I am also currently facing the same issue, I have order the board to be made and have all of the components APART from the RF22301 and the SD card holder.
    Octopart has nothing at all too, I literally researched all of the major and smaller suppliers, nobody has it! 

    Is it a possibility to use the 
    RFD-77101 component used for ganglion??? If so, how could one set that up? It would require modifying firmware and configurations??

    RF Digital also has the RFD2230 ( 
    http://www.rfdigital.com/product/rfd22302-rfduino-ble-smt-for-ext-antenna/index.html ), which I have no idea if it can work with the Cyton board. I believe it requires ''an external antenna'' judging by the title and really dont know anything about radio and how to chose the appropriate antenna and also set it up for communication with the dongle.


    Please if you could provide some tips, help and and a solution to this? For all the people that are trying to make this board and cannot access the components. The help will be GREATLY appreciated. 
  • biomurphbiomurph Brooklyn, NY
    @g_congo it does look like the RFD22301 is getting really hard to find.
    The module you link to, the RFD22302 is the same module as the 22301, it just doesn't have an antenna on it.
    You can use this as a drop in replacement for your purposes. Here's a link to a PCB antenna that would work, and fit onto the pads nicely


    There is a pin on the RFduino module called EXT_ANT, which is where you would attach an external antenna. You might be able to just solder a wire to this pad and get some results...
  • @biomurph thank you soooo much!!!! This has been puzzling me for quite a while now and been trying to prepare for a project that the deadline is quite close, you are saving me! :p

    Just a note anyone else that is looking for the RFD22301, after hours and hours of searching all of the possible suppliers, I came across a company ''SWATEE ELECTRONICS'' that happened to be the only ones that stocked the item and claimed to actually have more that 2500 of these in their stock available directly.... BUT it has been more than 15 days that they took the money out of my account and never replied to any email, call or even a dispute I started via Paypal, I am certain these people are shady and the whole thing is a scam, just a heads up to stay away!

    But this is definitely a solution, once again many thanks!
  • wjcroftwjcroft Mount Shasta, CA
    Note that Digikey is already out of stock on the RFD22302, and Mouser just has a couple dozen. That's it, EOL.

  • Any update on this? What are we supposed to do now? I would like to make my own board. Any other replacement parts which would work as close enough? I am okay even with having to change the firmware a bit.
  • Just happened to come across this forum while researching a processor I had in my stock of crap. I have a RFDuino with the RFD22310 chip, brand new never used. I had thrown away the packaging for smaller storage, but have decided that before I take on another project, I should just let it go. Would anyone be interested?
  • Hi, are there any updates on this ? I'd like to build a board and neither the RFD22301 nor the RFD22302 seem to be available anymore. Does anybody have any suggestions abot a replacement ?

    Thanks.
  • wjcroftwjcroft Mount Shasta, CA
    Peter, hi.

    One approach would be to substitute another type of "radio module" for the obsolete RFduino on the mainboard. The ESP32 would be a good candidate since it supports many different types of RF communications: Bluetooth classic, Bluetooth Low Energy, Wifi, etc. One of the Bluetooth classic modes implements a serial COM port stream on the laptop. So theoretically it would be possible to replace the dongle RFduino with the built-in radio hardware in the laptop.


    Of course such changes would require extensive firmware mods as well.

    In another thread, one user, managed to setup the existing Wifi Shield, to eliminate his use of the RFduinos. But did need an initial serial port connection for uploading the PIC32 Cyton firmware.


    Regards,

    William



  • edited February 2019
    Has anyone else had issues getting the Arduino IDE to recognize the RFDuino boards? Since AMS acquired RF Digital and took the .json files down I can't seem to get the Arduino IDE to recognize RFDuino boards. I'm using an RFD22121 USB shield to upload firmware to an RFD22102. I've tried following this tutorial


    in which the RFDuino libraries are downloaded off of GitHub and placed into the Arduino IDE hardware folders but this doesn't seem to work. Everything else I've read seems to indicate that a .json URL for RFDuino needs to be linked in the "Preferences-> Additional Board Managers URL:".  Does anyone have a source for .json files or any suggestions? 

    Regards,

    David 
  • wjcroftwjcroft Mount Shasta, CA
    edited February 2019
    David, hi.

    The RFD22301 programming instructions are here,


    According to the data sheet,


    The RFD22102 you are using, has the same RFD22301 base chip. So link above should be the programming directions you follow. Note that custom libraries are used and specific Arduino IDE version (not the latest).

    Regards,

    William

  • jbwittnerjbwittner Saint-Herblain
    Hello, it's the same for me.

    I want to make my cyton board, but now we can't buy any RFD module.

    Do you have any idea to solve this ?
    Maybe a hardware update of the board ?

    Regards,

    JB.
  • edited March 2019
    Hi JB,

    I recently built my own Cyton with WiFi Shield without the RFDuino ICs.

    See my post here:
  • jbwittnerjbwittner Saint-Herblain
    Hi,

    Thanks you for your response.

    Unfortunately, i need, for my project, to connect the Cyton on a Bluetooth device (smartphone, tablet, ...)
  • wjcroftwjcroft Mount Shasta, CA
    @jbwittner, hi. All mobile devices now have both Wifi AND Bluetooth. So the shield version of Cyton that Always built, would work for you.

    Another consideration is that the normal Cyton RFduinos, DO NOT speak regular Bluetooth protocols as used by mobiles. So normal Cyton (without shield), cannot easily talk with mobiles.
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