Using ESP-12 DEV KIT development shield module Extend the output ports for ESP-12 DEV KIT: SPI,UART, GPIO, AI and 3.3V power interface Extend 2-ways motor, then can directly drive2-ways motor Design a power switch Voltage for motor: 4.5V-36V Voltage for ESP control board: 4.5V-9V Driven cihip: L293DD Disparate the power of ESP board and motor foravoiding the interference. In our experiments, for convenience, a shortcutmodule is used to connect VIN and VM for the power of ESP board and motor.
