code: def pwm(host, seq, m1, m2, m3, m4):
      
      at(host, 'PWM', seq, [m1, m2, m3, m4])
docs: Sends control values directly to the engines, overriding control loops.
  
      Parameters:
      seq -- sequence number
      m1 -- Integer: front left command
      m2 -- Integer: front right command
      m3 -- Integer: back right command
      m4 -- Integer: back left command