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  1. Home
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  3. nrf24l01+ with antenna not working

nrf24l01+ with antenna not working

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  • Eduardo SantanaE Offline
    Eduardo SantanaE Offline
    Eduardo Santana
    wrote on last edited by
    #1

    I just got 4 nrf24l01+ modules with the external antennas, but I'm not able to make them work.

    I'm using arduino nanos and MySensors to create a gateway and a sensor.

    The funny thing is that when I put a antenna nrf as the gateway and a pcb nrf as sensor, they work just fine, but the other way doesn't.

    I also tried two nrfs as gateway and sensor, but the behavior does not look good.

    What could it be? Wifi router interference? Channel? Baud rate? Data rate?

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    • mfalkviddM Offline
      mfalkviddM Offline
      mfalkvidd
      Mod
      wrote on last edited by
      #2

      How do you power the Arduinos? The PA radios require quite a lot of power.

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      • Eduardo SantanaE Offline
        Eduardo SantanaE Offline
        Eduardo Santana
        wrote on last edited by Eduardo Santana
        #3

        I tried both using my laptop's usb ports. Then I used a battery on the sensor node.

        Note: I didn't power the nrf with the battery, just the arduino.

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        • OitzuO Offline
          OitzuO Offline
          Oitzu
          wrote on last edited by Oitzu
          #4

          @Eduardo-Santana you mean the pa/lna modules by nrf24l01+ with antennas?
          If yes then this may solve your problem:
          http://blog.blackoise.de/2016/02/fixing-your-cheap-nrf24l01-palna-module/

          The funny thing is that when I put a antenna nrf as the gateway and a pcb nrf as sensor, they work just fine, but the other way doesn't.

          In the standard config the sensor pa level is MAX and the gateway pa level is LOW.
          The pa/lna modules are more prone to errors, due to missing shielding (They basicly interefering with themself) and higher energy consumption, on higher PA levels.
          But you can use the module to its full potential with a proper power source and improvised shielding.

          Also: use the forum search. :P

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          • sundberg84S Offline
            sundberg84S Offline
            sundberg84
            Hardware Contributor
            wrote on last edited by
            #5

            Do you use any capacitors to filter the power?

            Controller: Proxmox VM - Home Assistant
            MySensors GW: Arduino Uno - W5100 Ethernet, Gw Shield Nrf24l01+ 2,4Ghz
            MySensors GW: Arduino Uno - Gw Shield RFM69, 433mhz
            RFLink GW - Arduino Mega + RFLink Shield, 433mhz

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            • K Offline
              K Offline
              kr0815
              wrote on last edited by
              #6

              I don´t know how the nrf24l01 is implemented in mysensors, but have a look here:

              https://www.squirrel-labs.net/blog/getting-the-best-out-of-nrf24l01/#page=1

              Does the mysensors library care about this ?

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              • OitzuO Offline
                OitzuO Offline
                Oitzu
                wrote on last edited by
                #7

                @kr0815 interesting find! :)
                But as far as is see the CE pin is keept high while sending and waiting for an ack.

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                • K Offline
                  K Offline
                  kr0815
                  wrote on last edited by
                  #8

                  Could anybody confirm this ?
                  I also have problems with the antenna version

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                  • OitzuO Offline
                    OitzuO Offline
                    Oitzu
                    wrote on last edited by
                    #9

                    @kr0815 yes, tmrh20 confirmed this.
                    https://github.com/TMRh20/RF24/issues/233

                    Did you already tried the other recommendations?

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