250kbps PHY Coded in NRF52832 BLE Mesh

[bivay]

How to set 250kbps PHY Coded in NRF52832 BLE Mesh?
I have tried to change  scanner_config_radio_mode_set(RADIO_MODE_BLE_1MBIT); to  scanner_config_radio_mode_set(RADIO_MODE_NRF_250KBIT);

but didn't getting data.
Can I get maximum range using 250kbps in BLE Mesh?
Is BLE Mesh reliable at 250kbps?

Mesh SDK:3.2.0

Thank You
Bivay

[Joakim Jakobsen]

Hi. 

There is no 250kbit mode for the nRF52-series. You are right there is a deprecated 250kbps legacy mode on the nRF52832, but it's not qualified and tested to be backwards compatible.

If you want to test 125kbit (Coded PHY), you can take a look at this previous ticket: 
https://devzone.nordicsemi.com/f/nordic-q-a/29813/change-phy-in-mesh 

Best regards, 
Joakim

[bivay]

62.5kbps is available for long range as suggest in above link.
But in

NRF_RADIO->PCNF0 |=(
 
                 ((RADIO_PCNF0_PLEN_LongRange << RADIO_PCNF0_PLEN_Pos) & RADIO_PCNF0_PLEN_Msk) |
                 ((2 << RADIO_PCNF0_CILEN_Pos) & RADIO_PCNF0_CILEN_Msk) |
                 ((3 << RADIO_PCNF0_TERMLEN_Pos) & RADIO_PCNF0_TERMLEN_Msk) );
        

RADIO_PCNF0_PLEN_LongRange and other two, how to define them.
will I find unprovisioned node in NRF Mesh if I use 62.5kbps?

[Joakim Jakobsen]

Hi. 

From the ticket i linked to:
"Please note that the long range mode is mislabeled. It is called RADIO_MODE_NRF_62K5BIT in the header file, but corresponds to the 125kbps BLE long range mode instead. "

In the answer from Hung, there should be an explanation to how to test using Coded PHY. 

Br, 
Joakim

[bivay]

But there is not information about I would I define "RADIO_PCNF0_PLEN_LongRange "?

and my other question : NRF Mesh Android App supports different phy cod like 62.5kbps or 125kbps as said before.

[Joakim Jakobsen]

I'm sorry. I missed that you are using the nRF52832. 

The nRF52832 does not support Long Range (Coded PHY). You will need to use the nRF52840 in order to test Coded PHY. 

Br, 
Joakim

[bivay]

In SDK 15.2.0 
radio_config.h 
at line 103, there is define
RADIO_MODE_NRF_250KBIT in radio_mode_t

typedef enum
{
RADIO_MODE_NRF_1MBIT, /*!< Proprietary 1Mbit/s mode*/
RADIO_MODE_NRF_2MBIT, /*!< High data rate */
RADIO_MODE_NRF_250KBIT, /*!< Deprecated */
RADIO_MODE_BLE_1MBIT, /*!< BLE 1Mbit/s mode*/
#ifdef NRF52_SERIES
RADIO_MODE_BLE_2MBIT, /*!< BLE high data rate */
RADIO_MODE_NRF_62K5BIT, /*!< Long range */
#endif
RADIO_MODE_END
} radio_mode_t;

Can I use 250KBIT?
There is only define NRF52_SERIES for 62K5BIT. not NRF52840 only(as in many cases it is specially define).

Or
Is there option to use low data rate to increase range in NRF52832?

[Joakim Jakobsen]

Hi. 

No, I'm afraid you can't. As you can see from the comment, the RADIO_MODE_NRF_250KBIT is Deprecated. 

[Joakim Jakobsen]

bivay said:

There is only define NRF52_SERIES for 62K5BIT. not NRF52840 only

 This is because we now have several devices in the nRF52-series that supports Long Range, not only the nRF52840. 

The nRF52832 however, does not. 

[bivay]

Thank for your kind support.