Hi!
We can send data via Bluetooth 2.1(about 700 bytes) by Android SDK. In this case we used SPP profile. from the Apple iOS SDK can not do this by Bluetooth 2.1, because we need a certificate MFI (Made for iPhone) from Apple . We don't want use MFI characteristics due to the time and would like to use Bluetooth Low Energy connection with iPhone, now we can "see" SPPLE iPhone profile (characteristics for reading and writing) in Apple iOS SDK but do not know how to write back 700 bytes of our information.
Also when we had a connection via Bluetooth 2.1 it need a PIN for pair, but in case with SPPLE it needn't (there is nor characteristics for PIN)
We use MSP430F5438