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Absolutely brilliant - thank you very much indeed. The array pointer looks the better option to me and is similar to the way in which I did this using the <Servo.h> library when driving the servos directly from the Arduino for an earlier project.

I am using 2 PCA9685s with my project and it depends upon an input (a push-button read at the beginning of the loop) as to whether the servo I want to activate is connected to either the first or second board. Is there any way to insert a variable into the call HCPCA9685_1.Servo(1, 250) where the in...