does nrf51 softdevice can connect with specific channel?

[Daniel T. Lee]

As I know, BLE Advertising on 37, 38 ,39 channel and I can select which channel to advertise by masking them.

But, Is it possible to make an data connection to a channel as I want (from 1~38)?

Easily, can I choose which channel to communicate with Peripheral or Central?

I really tried to search for it, but I can't found such thing like that.

I think which channel to connected is all softdevice's desire.

Can I manage or choose which channel to data connection?

If I can, then How can I achive it?

[RK]

You could try sd_ble_opt_set with the option ble_gap_opt_ch_map_t and set a one-channel channel map. I really don't know why you'd want to do that however as any interference will probably result in loss of connection. There's a reason bluetooth uses 37 channels.

[endnode]

Daniel, BLE is designed to use all 37 channels with hopping in time so real throughput is typically much more then 37, probably thousands of connections (depends on connection interval, if multiple PDUs are sent, if PDU extension is used etc.) However thinking that by "manual" management of channels you will get "smarter" and achieve better bandwidth/scalability is false.