BLE Long write

[darren]

My Setup: Nordic is the Server, Android is the client.

I have read many, many forum posts about doing long reads/writes. Virtually everyone says you cannot do long writes. Instead you have to do a sequence of 20 byte writes.
devzone.nordicsemi.com/.../

I've also looked into Android API, and found that they do long read under the hood but do not support long write. I can only send 20 byte at a time. This is just what the forum posts have said.

HOWEVER, what I don't understand is how Noric Master Control Panel successfully executes long write. I can load up a 50 byte message and pass it over the Android App version of MCP. Is there something utilized in the MCP that I have missed, or cannot get access to in Android?

I cannot believe there is no way to write large streams of data from a phone to a BLE chip. It must be that I've missed something.

Thanks for your help!

[darren]

To be fair, I only have access to the Android side, but i do know there is prepareReliableWrite() type methods in android: link. Perhaps this is what is going on. I will go see if I can implement something with this.

Why is there not a longer write to be able to do data dumps? Is this a design decision of BLE?