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CC2530-CC2591EM-RD: How do I make an arrangement with an option whether to connect the CC2530 to the range extender or not?

Part Number: CC2530-CC2591EM-RD
Other Parts Discussed in Thread: CC2591, CC2530

Hi experts,

I want to use the range extender CC2591 to extend the range of CC2530. However, I want to make such an arrangement that most of the time the CC2530 will be working with it's own transceiver system; and some of the time it'll seek help from the CC2591 to extend the range. I wanted to introduce a 'switch' to move between these two states. I need some suggestions on the 'switch' type and how to implement the idea in PCB level. Thanks a lot in advance.

Regards,

Reja

  • Hi,

    You can just Lower the Tx Power level to +4dBm (with CC2530+CC2591 Combination) or so (can be reduced to -4dBm as per SmartRF Studio setting). This is equivalent to using CC2530 alone (Tx power is 4.5dBm Maximum).
    Yes, the receiver performance will be better with CC2591.

    Thanks,
    PM

  • Hi PM,

    Thank you very much for your reply. It's very helpful information. Now, how can I control the Tx power level setting in an user perspective? I mean, do I have to go to SmartRF Studio to change the setting every time I want to switch between the ranges? Is there any suggestion to implement the idea through electronic components so the user can change the range whenever they want? Thanks a lot.

    Regards,

    Reja
  • Hi,

    I don't know your application and how you are using it?

    The SmartRF Studio can be used for testing purpose.

    You can implement this function (lowering the Tx Power) in your software code, whenever you want to reduce the Range.

    Thanks,

    PM

  • Hi,

    Thank you very much for your reply. I am designing a Smart Junction Box to control the solar panel activity (turn off, turn on, measuring data etc.). The CC2530+CC2591 will be sitting on the solar panel side and the user will have a remote control device to operate the activities. Sometimes the user would not want a long range to operate and sometimes they'd want a long range. So my query is, is there any idea on how to make an user friendly control system using simple electronic circuit so that they won't have to write code? Or, is modifying the software code the only option? Thank you.

    Regards,

    Reja
  • Hi,

    Why do you want to reduce the Range? What is the reason behind it?

    If you think of having few Junction Boxes within the Range then you can use specific address for each and every box.

    When the transmitter sends that specific address then the corresponding Receiver will respond . The other Receivers will not respond because their address fields are different from the Transmitter.

    Still, if you want to reduce the power from the Hardware then configure one of the Remote Button for Low Power operation.

    When you operate that Button then the Tx Power setting changes to Lower Level ( +4dBm or so).

    Thanks,
    PM
  • Hi,

    Thanks for your reply. Lowering the range is not my goal. I wanted to design an arrangement which would disconnect the CC2591 when not in use. It would save power consumption. Thank you.

    Regards,

    Reja
  • Hi,

    Then you need to use the Switch to bypass CC2591.

    If you don't want to use the Switch then you can reduce the current consumption by reducing the Output power.
    Please see Figure 6 on CC2591 Data sheet for Output Power Versus Current consumption.

    Thanks,
    PM
  • Hi,

    The idea of using a switch sounds good since i don't want to reduce the output power from either of the devices. So, what type of switches might be suitable for this application? And how do I place the switch in between the devices, since the five pins (RF_P, RF_N, P1_1, P1_4, P0_7) from CC2530 are going to be connected to RF_P, RF_N, PAEN, EN, HGM respectively of CC2591 for longer range? Thank you for your help.

    Regards,

    Reja
  • Hi,

    You can use Skyworks SKY66112-11 FEM. It has a Bypass mode.

    SE2431 (in an App note) can be replaced with SKY66112-11

    Attached are the Data sheet and App note. App note is available on our website.

    Thanks,

    PM

    swra439.pdf

    SKY66112_11_203225L.pdf

  • Thank you very much. It helps a lot.

    Regards,

    Reja