nRF51822AB better SD?

[Lean]

Hi everyone! I made some board with 51822 (128k, 16k). I have only 20kb free if I use the S130. The questions:

a) I only will sent data to a mobile. Can I use the S110 that it's more lightweight (some kb)? However I noted "there is no support" in SDK 12 for example? I wrote a simple state machine (0.5kb) and I have almost 10kb in NUS, BLE, Services, etc init. So I have < 10kb to use i2C, SPI, etc. I don't "understand" so much the idea of 128kb flash uC with the last SD in 108kb...

b) I will make my application to send information through BLE from flash memory (lot!!!). Which is the better service it's better to use (NUS, HRS or other). Now I use NUS, but I only can send 20 byte every. My buffer will be in the Mbyte.

Thank!

[Petter Myhre]

a) Yes, you can use S110, if you don't need the S130 features. It is supported by SDK 10, so I would use that.

If you need more flash/RAM you should use another version of the nRF51822 chip.

b) Which service your use isn't that relevant, but you should use notifications/write commands. There are several questions about this already, please search. This for example.

Edit: Added b

[Lean]

Hi Petter, thank for your answer. If you so kind, could you awswer the part b) about the most efficient way to transmit data over BLE. I need you advice to advance in correct way