How to collaborate a private protocol with BLE.

[jhc]

Hi, 

My device is working with BLE most of the time, but it also needs to activate a private protocol,

1. to send messages to other devices in case of an emergency, 

2. to keep the possibility to receive the messages sent by other devices.

I know NCS supports multiple protocols at the same time,

But how to get the private protocol to work together with BLE?

Thank you in advance!

[Håkon Alseth]

Hi,

 

There's an example of setting up timeslot API here:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.4.0/nrf/samples/mpsl/timeslot/README.html

 

As well as a blog post here:

 Updating to the MPSL Timeslot interface 

 

Kind regards,

Håkon

[jhc]

Hello Håkon

I am using nrf52840.

The two boards communicate well with each other with 1Mbps or 2Mbps bitrate, but if I set the bitrate to 250kpbs or 500kbps, they can't communicate.

I wonder if it is possible to set the bitrate to 125kpbs or 250kpbs for ESB?

[Håkon Alseth]

Hi,

 

My apologies for the late reply.

ESB does not support long-range bit modes.

These are the supported bit rates:

https://github.com/nrfconnect/sdk-nrf/blob/main/subsys/esb/esb.c#L595-L629

 

NRF 250 kBit is supported (although this is a deprecated radio bit rate and not recommended to be used as per the PS), but you will need to adjust your re-transmission delay to a higher value.

 

Kind regards,

Håkon