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  1. Home
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  3. What are these modules?

What are these modules?

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  • N Offline
    N Offline
    NeverDie
    Hero Member
    wrote on last edited by NeverDie
    #1

    https://www.aliexpress.com/item/LCD-Board-T420XW01-V2-06A39-1A-42WL68C-Logic-board-New-In-stock-In-stock-Best-price/583655445.html?spm=a2g0s.9042311.0.0.LmSC1G

    I got some just to try. They definitely are not nRF24L01: if treated as such, they don't appear talk even to each other. What are they?

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    • N Offline
      N Offline
      Nca78
      Hardware Contributor
      wrote on last edited by
      #2

      The infamous blob clones :)

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      • N Offline
        N Offline
        NeverDie
        Hero Member
        wrote on last edited by NeverDie
        #3

        I have some different blob modules which work quite well. Maybe the pinout on these are different.... Or maybe they're just complete junk. Is anyone here using them for anything?

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        • gohanG Offline
          gohanG Offline
          gohan
          Mod
          wrote on last edited by
          #4

          I always believed they are just a bunch of junk soldered on a pcb 😌

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          • M Offline
            M Offline
            manutremo
            wrote on last edited by
            #5

            I had those blobs modules in the past and returned them because they were fake (sold as nrf24L01). In fact, they worked quite well between them with the proper library; however they were unable to connect to genuine nrf24L01's.

            Those modules tend to contain chip Si24R1, which seems to be a copy of the legit nrf24L01's but they forgot (maybe intentionally?) a small detail which makes them incompatible. This is documented in many internet sites. I actually used those sites to support my claim to get my money returned. I remember I was able to find some library around which had been hacked to make them work, and some workarounds were even mentioned in this forum - see this.

            If they are not even able to connect with each other, the ones you received may just be 100% junk so you should just claim the seller for reimbursement.

            N 1 Reply Last reply
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            • M manutremo

              I had those blobs modules in the past and returned them because they were fake (sold as nrf24L01). In fact, they worked quite well between them with the proper library; however they were unable to connect to genuine nrf24L01's.

              Those modules tend to contain chip Si24R1, which seems to be a copy of the legit nrf24L01's but they forgot (maybe intentionally?) a small detail which makes them incompatible. This is documented in many internet sites. I actually used those sites to support my claim to get my money returned. I remember I was able to find some library around which had been hacked to make them work, and some workarounds were even mentioned in this forum - see this.

              If they are not even able to connect with each other, the ones you received may just be 100% junk so you should just claim the seller for reimbursement.

              N Offline
              N Offline
              NeverDie
              Hero Member
              wrote on last edited by
              #6

              Sigrok lists some of the known clones: https://sigrok.org/wiki/Protocol_decoder:Nrf24l01 Only two of them are COB though. Of course, Sigrok may not have a complete list.

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              • N Offline
                N Offline
                NeverDie
                Hero Member
                wrote on last edited by NeverDie
                #7

                Looks as though they are very likely SE8R01's. This link contains a datasheet for the SE8R01 and a pinout for the SMD module: http://community.atmel.com/forum/help-identifying-nrf24l01-compatible-modules It does not appear that it can interoperate with an nRF24L01.

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                • N Offline
                  N Offline
                  NeverDie
                  Hero Member
                  wrote on last edited by
                  #8

                  There's a library specifically designed to work with them: https://github.com/Sofcom/NRF24Lmodule-SE8R01

                  Also found another interesting library for working with other, different, "clones" of the nRF24L01: https://github.com/jnk0le/RFM7x-lib

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