How do I use Core Bluetooth in the simplest possible way to send a value of 0 to 1 from an iOS device to a bluetooth peripheral that does nothing but interpret the value sent to it as how strongly a vibrating component on the bluetooth peripheral should vibrate. A value of zero would mean the peripheral device doesn't vibrate at all, of course.
The bluetooth peripheral would be the bluetooth ***** of course, and the iOS device would be the bluetooth master. The ***** device doesn't need to send anything at all to the master iOS device, except to link to the master. I don't know if that would allow the ***** bluetooth device to be any less expensive or smaller or simpler.
