Changing the PHY used by device

[Chalad]

Hi there, 

I am currently runnning tests with the nrf52840 for university project on Bluetooth 5 and I'm struggling to figure otu how to change the PHY used, 

e.g. in the heart rate sensor example there is code for BLE_GAP_EVT_PHY_UPDATE_REQUEST, does changing the lines

                .rx_phys = BLE_GAP_PHY_AUTO,
                .tx_phys = BLE_GAP_PHY_AUTO,

to

                .rx_phys = BLE_GAP_PHY_CODED,
                .tx_phys = BLE_GAP_PHY_CODED,

make the device work in LE coded or is there something else that has to be done?

[Mttrinh]

Hi,

Can you tell me more about what is that doesn't work? Are you trying to advertise in coded PHY or just changing the PHY after connection?

I suggest you take a look at this example on GIthub:

https://github.com/NordicPlayground/nrf52-ble-app-uart-long-range

Best Regards,

Martin

[Chalad]

Hi Martin, I mean initial advertising in coded PHY, I see now how thats being set in the example you linked to by the ble_gap_adv_params_t struct. Is it only possible to advertise in coded with softdevice 6.0.0-6?

[Mttrinh]

Hi,

Support for Advertising in Coded PHY were added in s140v5.0.0-3.alpha, so you should be able to use s140v5.0.0-3.alpha. But the example I linked you is based on the s140v6.0.0-6.alpha, so it is recommended to use this softdevice. Also with the s140v6.0.0-6.alpha improvements were made to LE Coded PHY, which gave increased maximum range, and an updated API.