The FeatherWing Doubler (https://www.adafruit.com/product/2890) allows you to connect together the Feather HUZZAH ESP8266 board and the DC Motor + Stepper FeatherWing Add-on board. Figure 5.3 shows a FeatherWing Doubler with soldered Feather stacking headers:
Figure 5.3: A FeatherWing Doubler. Image courtesy of Adafruit Industries (https://www.adafruit.com/)
- Stick four bumper feet near the corners of the FeatherWing Doubler, but don't cover up any of the mounting holes (Figure 5.4):
Figure 5.4: Sticking the bumper ...
