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RF220 / SM220 Antenna option

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  • RF220 / SM220 Antenna option

    The 220 series of devices have two antenna options, one for the PCB "F" antenna and the other a U.FL connector. The default antenna setting is "F" antenna. If you wish to switch to the U.FL connector then NV64 will have to be modified. (please consult the SNAP reference manual for more info)

    Attached is a script that makes this process easier for the end user. Compliments of Synapse QA engineer - BTice

    There is also even a simpler approach using the following command: (this is not save on reset)

    writePin(33,True) #U.FL antenna
    writePin(33,False) #"F" antenna
    Attached Files

  • #2
    Turbo Mode ?

    I have been exploring the RF220 radios and ran across this post. I noticed besides the code to get and set the antenna options there are three functions that reference turbo mode... What is turbo mode ?

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    • #3
      Please reference page 161 of the Snap Reference Manual, copied here:

      Vendor-specific settings:
      NV Parameter 64 is used on the ATmega128RFA1.
      Bit 0x0001 – Enables a “turbo” mode in the node, allowing for slightly faster radio communications between nodes by reducing the pauses between packets. You can set this bit (and reboot the node) to slightly increase throughput, but the node will only be able to communicate over the air with other ATmega128RFA1 nodes that also have the bit set. The node will no longer be able to communicate with other 2.4 GHz SNAP nodes based on other platforms, or based on this platform but with the bit not set.

      "Turbo mode" allows transmission rates up to 2Mbps. It also increases the unicast routing tables from 10 entries to 100.

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