Solder socket headers to the FeatherWing Proto.

Solder four wires to the RS232 breakout:

• Vin (red wire)
• GND (black wire)
• RX (green wire)
• TX (blue wire)

Solder the other ends of the wires to the FeatherWing:

• Breakout Vin to Proto 3.3V (red wire)
• Breakout GND to Proto GND (black wire)
• Breakout RX to Proto RX (green wire)
• Breakout TX to Proto TX (blue wire)

Solder plug headers to the ESP32-S3 Feather.

Secure the RS232 breakout to its two mounting holes with M3 screws. Secure the FeatherWing to its four mounting holes with M2.5 screws.

Plug the ESP32-S3 Feather into the FeatherWing.

Close with case with its lid. The NeoPixel diffuser should be above the Feather.