Testing range of BLE coded Phy with nRF52833 DK

Hi,

  We are in the process of evaluating coded phy transceiver for our next product. The product is a IoT node which will send sensor data to centralized gateway and will be used in commercial office spaces. The main concern for us is to use a globally accepted band with decent penetration through concrete walls ( at least 35meters)

We are using nRF52833 dk for evaluation where we plan to use this as both peripheral and central device.

As a first step, i started with doing rage test indoors. Using direct test mode using the "direct_test_mode_pca10100.hex" hex file from examples

The observations are:

1. both BLE coded phy s8 and s2 were giving a range of close to 35 meters with 8dB tx power

2. BLE 1Mbps was giving close to 32 meters with 8dB tx power

3. receiver configured to s=8 can detect s2 mode transmitters packet and vice versa. But this does not happen with one of the devices kept in 1Mbps/2Mbps mode

The questions I have are ,

I am i really able to configure coded phy s=2 in these devices using nRF connect, or are both s2 & s8 are setting the same baseband data rate of s2? as my range is not improving with s8

is there a way to use one of the spare nRF 52833dk as a Coded phy sniffer?

  • Hi

    I am i really able to configure coded phy s=2 in these devices using nRF connect, or are both s2 & s8 are setting the same baseband data rate of s2? as my range is not improving with s8

    The receiver configuration is the same for both S2 and S8, the only difference is the coding. S2 encodes each data bit in 2 bits, and S8 in 8. 

    The SoftDevice can only transmit in S8, not in S2, since we don't expect S2 to provide a very noticeable difference. If the SoftDevice is communicating with some non Nordic Bluetooth stack that can transmit in S2 the SoftDevice can receive it. 

    is there a way to use one of the spare nRF 52833dk as a Coded phy sniffer?

    We don't have any example for this unfortunately. The Nordic sniffer supports 1M mode only. 

    Best regards
    Torbjørn

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