Long Range issue in nrf52840 CODED PHY mode

[KamalpreetS]

Hi Guys,

We are developing a peripheral node and a gateway using nrf52840, we procured Adafruit itsy bitsy nrf52840 boards having Raytac MDBT50Q modules (ceramic antenna)

we were using Arduino environment earlier then we shifted to the latest nrf sdk, we are testing the connectivity and range  between the central and peripheral nodes. Using 1MBPS PHY we got around 6-7 m range having 2 concrete walls in between, we then tried to use CODED PHY to increase the range but we did not get any positive result. The outcome remained the same, we also used the code (zip file) mentioned in https://devzone.nordicsemi.com/f/nordic-q-a/40476/unable-to-convert-to-long-range-after-looking-at-umpteen-examples--,  but the range remained the same, we almost tried everything, we really look forward for your support.

Regards

Kamal

[KamalpreetS]

We are using the maximum transmission power +8db 

[Susheel Nuguru]

That seems strange. 
Have you double checked (using sniffer) that your device indeed is running in CODED_PHY mode? 

Testing with two concrete walls might also be very tricky if they absorb most of the signal, but you should have seen some improvement.

If you have nRF52840 DK, can you do the same test on them and see what results you achieve? We can then focus either on hardware or firmware based on your results of this test.