From 6911639617b9857adc06d424b25b1d92b4a0ae91 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Mon, 5 Dec 2022 19:46:00 +1300
Subject: [PATCH] Fix board pin alias lookup (#4147)

---
 esphome/components/esp32/gpio.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/esphome/components/esp32/gpio.py b/esphome/components/esp32/gpio.py
index 518514a6a3..0c46bc9801 100644
--- a/esphome/components/esp32/gpio.py
+++ b/esphome/components/esp32/gpio.py
@@ -108,6 +108,10 @@ def validate_gpio_pin(value):
     board = CORE.data[KEY_ESP32][KEY_BOARD]
     board_pins = boards.ESP32_BOARD_PINS.get(board, {})
 
+    # Resolved aliased board pins (shorthand when two boards have the same pin configuration)
+    while isinstance(board_pins, str):
+        board_pins = boards.ESP32_BOARD_PINS[board_pins]
+
     if value in board_pins.values():
         return value