diff --git a/src/planemapper/gpio_ctrl.py b/src/planemapper/gpio_ctrl.py
index 94e7322..078a9c3 100644
--- a/src/planemapper/gpio_ctrl.py
+++ b/src/planemapper/gpio_ctrl.py
@@ -6,7 +6,7 @@ from planemapper.constants import RESET_HOLD_S
 
 log = logging.getLogger(__name__)
 
-BUTTON_GPIO_PIN = 17
+BUTTON_GPIO_PIN = 22  # BCM 17 is used by Waveshare e-ink HAT (RST_PIN)
 LED_GPIO_PIN = 27