Your wiring to the Pi seems correct, but the servo side has no power supply in your pic.
See https://learn.adafruit.com/adafruit-16-channel-servo-driver-with-raspberry-pi/hooking-it-up which goes into some details about power.
Your wiring to the Pi seems correct, but the servo side has no power supply in your pic.
See https://learn.adafruit.com/adafruit-16-channel-servo-driver-with-raspberry-pi/hooking-it-up which goes into some details about power.