ESP32 GPIO Wiring Review Checklist

Use this as a review aid

Use this checklist as a brief review aid before making prototype connections. It is not a substitute for the documentation for your ESP32 board or the components you are using.

• Confirm the GPIO pin's intended purpose in the prototype.
• Check the voltage assumptions for every connected signal.
• Review the planned input or output state before powering the circuit.

Short review sequence

Start with the board pin reference, then compare each signal with the connected component's documentation. Finally, confirm the expected state of each input and output before connecting the prototype.

• Identify the GPIO and its purpose.
• Verify voltage assumptions.
• Confirm input and output state.

Filled example: documentation review only

Example board: base Seeed Studio XIAO ESP32-S3 (SKU 113991114). This row demonstrates a pin-map lookup, not an electrically verified circuit. Unknown electrical details remain a stop condition.

• Verify D4 in the Seeed XIAO ESP32-S3 pin map

Copy and fill for your own board

Copy this worksheet once per signal. Verify the exact model and revision, board label-to-GPIO mapping, peripheral function and conflicts, direction, voltage limits, pull-up supply, external device, startup state and source. Do not copy the example mapping to another ESP32 board.

Board/model/revision: ______
Signal and connected device: ______
Board label -> GPIO: ______
Function / direction / conflicts: ______
Voltage limits / pull-up supply: ______
Startup state: ______
Manufacturer source / date checked: ______
Decision: HOLD / READY; unresolved items: ______

• Understand GPIO labels and repeat the pin-map example
• Compare compact ESP32 boards if your requirements do not fit