Hi, recently i've wanted to edit the arduino code to my own. Firstly, i am looking for the correct pin number of A3-A9 in the Arducopter source code. (Optical flow enable, motor led, so on). Anyone knows where can A3-A9 be found? I've managed to find A0 which is for the sonar sensor but i couldn't find A3-A9 as pins anywhere! Any ideas guys?

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