Created this because I needed a way to control a Servo Gripper via my Bluefruit. Took me a little bit, but hopefully sharing this will save you time on your project.
First, goto Adafruit's website and make sure that you've gone through the process of setting up your Arduino IDE.
I placed my gripper servo on A03, but feel free to change that in the code. Line 110
myservo.attach(21); // Attaches Servo to A03 (pin 21)
Obviously place red power to pwr, and brown ground to grnd.
Yes, I'm aware that the power is only 3.3v and the servo needs 5v, but it works well enough for my purposes
Download or fork then download my folder from here and then run Adafruit_Feather_Bluefruit_Servo_Gripper.ino
That will open BluefruitConfig.h and packetParser.ccp along with it.
Upload to your Feather.
Download the Adafruit Bluefruit App for iOS or Android.
Connect to your Feather in the menu (make sure your BlueTooth is on, haha.)
Then goto controller, and hit one of the buttons! Pressing and holding a button will open the gripper, depress to close gripper.
Need it to stay open, just comment that out in line 199.
myservo.write(180); // BUTTON IS DEPRESSED, CLOSE GRIPPER
Many thanks to the Arduino reference site that helped me understand the Servo commands.
And a huge shoutout to Adafruit for creating the command example in the Feather library for which this is code is mostly based on.