Breadboard | NodeMCU, GPIO, index | H-bridge
-------------------------------------
 13        |  D0, 16, 0           | 15      # driver channel 4 input
 14        |  D1,  5, 1           | 10      # driver channel 3 input
 15        |  D2,  4, 2           |  9      # driver 3/4 enable  (pwm)
 16        |  D3,  0, 3           |  2      # driver channel 2 input
 17        |  D4,  2, 4           |  7      # driver channel 1 input
 20        |  D5, 14, 5           |  1      # driver 1/2 enable (pwm)
 26        |  GND    
 
Motor example:
 First motor:
 GPIO16 -> HIGH (index 0)
 GPIO05 -> LOW  (index 1) 
 GPIO04 -> HIGH (index 2)

 Second motor:
 GPIO00 -> HIGH (index 3)
 GPIO02 -> LOW  (index 4)
 GPIO14 -> HIGH (index 5)

