Is there any SD for nrf52 just work on ble peripheral like S110?

[bluetoothbiao]

The nrf52 with SDK 0.9.2 SDs132_nrf52_2.0.0-4.alpha_softdevice has 3 TX_buffers(2 count can i used).

I think there may be some preserve TX_buffers for BLE central or ANT.

[Petter Myhre]

The MTU is something else than the number of TX buffers. I can't comment on that, if you want information MTU increase, I suggest you contact the Regional Sales Manager for your area. If you don't know who it is send me a PM with you location and I'll let you know.

[bluetoothbiao]

OK I will contact he.