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  3. SenseBender, check wires

SenseBender, check wires

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  • SweebeeS Offline
    SweebeeS Offline
    Sweebee
    wrote on last edited by Sweebee
    #1

    I attached the nrf to the sense bender but i get: check wires.

    Can't see whats wrong?

    https://i.imgur.com/WNLenAb.jpg
    https://i.imgur.com/nW5Jubw.jpg

    I tried 5 different nrfs

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

      Looks to me like the NRF is without +. See discussion and instructions in http://forum.mysensors.org/topic/2891/nrf24l01-will-not-start

      1 Reply Last reply
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      • SweebeeS Offline
        SweebeeS Offline
        Sweebee
        wrote on last edited by
        #3

        I checked them, but they are all the + version nrf24l01+

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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
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                • 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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