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S120 has very short range?

Adrian Eggenberger

Hi We did a few tests with the S120 softdevice (example in the SDK 5.1). Most things are working as expected, but the range of the device is by far less than we reached with the S110 examples.

Devices could only be detected by the scan if they were in a distance of 5 meter or less. Do you have an explanation for this?

BR/ Adrian

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    I forgot to mention, that i tried this with Evaluation Board and Development Board with same result.

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    Hi Adrian,

    In order to avoid spurious connections to devices, and to be able to work with limited interface, examples for S120 are configured to connect to devices only in a certain range. If you want to relax this, CONN_MNGR_TARGET_RSSI in conn_mngr_cnfg.h should be set to -127 instead of default of -60 provided in the example.

    You will be able to establish connections with peripherals over longer distances with this.

    In case you want to know further details about the configuration, I would encourage you to read the documentation.

    Hope this helps!

    Regards, Krishna

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    Hi Krishna,

    I have the same question but now with the sdk 5.2.0. Since the Connection Manager module has been substituted by the Device Manager and I don't see there any way to configure the minimum RSSI. Is there a new way to do this? or this just have been removed? In that case, the S120 will scan for any RSSI? or the TX_POWER should be incremented to achieve more range?

    Thank you.

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    I have the same problem here. How can I increase the range of the S120 device?

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