Keyestudio 4WD Manual page 285

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①forward function
② The front left motor rotates forward at a
speed of 40
③The motor at the rear left rotates forward
at a speed of 40
④The front right motor rotates forward at a
speed of 40
⑤ The rear right motor rotates forward at a
speed of 40
⑥Backward function
⑦The front left motor reverses, the speed is
40
⑧ The rear left motor reverses, the speed is
40
⑨ The front right motor reverses, the speed
is 40
⑩The rear right motor reverses, the speed is
40
⑪ Left turn function
⑫The front left motor reverses, the speed is
285
60
⑬The rear left motor reverses at a speed of
60