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  3. SenseBender, check wires

SenseBender, check wires

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  • tbowmoT Offline
    tbowmoT Offline
    tbowmo
    Admin
    wrote on last edited by
    #4

    @Sweebee

    I can't see the + in the picture, that validates it as a nrf24l01+ ?

    Check page 73 in the datasheet for the markings http://www.nordicsemi.com/eng/content/download/2726/34069/file/nRF24L01P_Product_Specification_1_0.pdf

    You could try disabling the + variant check in the Mysensors core
    https://github.com/mysensors/Arduino/blob/master/libraries/MySensors/MyTransportNRF24.cpp#L35

    And perhaps set RF24_DATARATE to 1Mbit instead of 250Kbit (as 250kbit is only available on the + variant)

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    • SweebeeS Offline
      SweebeeS Offline
      Sweebee
      wrote on last edited by
      #5

      I have used this nrf with other arduino's and there they work fine.

      This is a close-up picture: https://i.imgur.com/CLnR6p6.jpg

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      • mfalkviddM Offline
        mfalkviddM Offline
        mfalkvidd
        Mod
        wrote on last edited by
        #6

        The + is clearly visible on that picture so no need to reconfigure for the non-plus chip.

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        • hekH Offline
          hekH Offline
          hek
          Admin
          wrote on last edited by
          #7

          @Sweebee

          Do you have a multimeter (with continuity test) to help you check that the NRF socket pins is connected with the MCU?

          SweebeeS 1 Reply Last reply
          0
          • hekH hek

            @Sweebee

            Do you have a multimeter (with continuity test) to help you check that the NRF socket pins is connected with the MCU?

            SweebeeS Offline
            SweebeeS Offline
            Sweebee
            wrote on last edited by
            #8

            @hek yes, the sockets are fine. Maybe i have to measure directly between the atmega and the socket?

            hekH 1 Reply Last reply
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            • SweebeeS Sweebee

              @hek yes, the sockets are fine. Maybe i have to measure directly between the atmega and the socket?

              hekH Offline
              hekH Offline
              hek
              Admin
              wrote on last edited by
              #9

              @Sweebee

              Yes

              SweebeeS 1 Reply Last reply
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              • hekH hek

                @Sweebee

                Yes

                SweebeeS Offline
                SweebeeS Offline
                Sweebee
                wrote on last edited by Sweebee
                #10

                @hek Every nrf pin has a connection to the atmega. But is it normal that the VCC and CSI are connected to each other?

                I measured a mysensors pir and they don't have a connection to each other.

                tbowmoT 1 Reply Last reply
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                • SweebeeS Sweebee

                  @hek Every nrf pin has a connection to the atmega. But is it normal that the VCC and CSI are connected to each other?

                  I measured a mysensors pir and they don't have a connection to each other.

                  tbowmoT Offline
                  tbowmoT Offline
                  tbowmo
                  Admin
                  wrote on last edited by
                  #11

                  @Sweebee

                  There shouldn't be any short-circuit between any of the pins on the connector. Could you check the board for solder bridges?

                  SweebeeS 1 Reply Last reply
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                  • tbowmoT tbowmo

                    @Sweebee

                    There shouldn't be any short-circuit between any of the pins on the connector. Could you check the board for solder bridges?

                    SweebeeS Offline
                    SweebeeS Offline
                    Sweebee
                    wrote on last edited by
                    #12

                    @tbowmo Can't find any bridges. On the atmega it's hard to see, but the pins that are connected to each other aren't close to each other.

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                    • tbowmoT Offline
                      tbowmoT Offline
                      tbowmo
                      Admin
                      wrote on last edited by
                      #13

                      @Sweebee

                      The short is between two adjacent pins in the header, it could be that it's the socket that has a defect.

                      Next step is therefore to remove the socket. Either by desoldering it as a whole unit, or break it apart and remove 1 leg at a time. But do be careful not to damage the pcb.

                      SweebeeS 1 Reply Last reply
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                      • tbowmoT tbowmo

                        @Sweebee

                        The short is between two adjacent pins in the header, it could be that it's the socket that has a defect.

                        Next step is therefore to remove the socket. Either by desoldering it as a whole unit, or break it apart and remove 1 leg at a time. But do be careful not to damage the pcb.

                        SweebeeS Offline
                        SweebeeS Offline
                        Sweebee
                        wrote on last edited by Sweebee
                        #14

                        @tbowmo Got it! thanks. Stupid me. There was some lost soldering in the header.

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