pybricks.ev3devices.InfraredSensor: Fix keypad returning wrong button.

Author: laurensvalk

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 [Unreleased]: https://github.com/pybricks/pybricks-micropython/compare/v4.0.0b11...HEAD
 
+### Fixed
+- Fixed button `LEFT_DOWN` returning `LEFT_UP` in the method
+  `ev3devices.InfraredSensor.keypad()` ([support#2724]).
+
 ## [4.0.0b11] - 2026-05-30
 
 ### Added

pybricks/ev3devices/pb_type_ev3devices_infraredsensor.c

@@ -167,7 +167,7 @@ static mp_obj_t ev3devices_InfraredSensor_keypad(mp_obj_t self_in) {
         pressed[len++] = pb_type_button_new(MP_QSTR_LEFT_UP);
     }
     if (keypad_data & 0x20) {
-        pressed[len++] = pb_type_button_new(MP_QSTR_LEFT_UP);
+        pressed[len++] = pb_type_button_new(MP_QSTR_LEFT_DOWN);
     }
     if (keypad_data & 0x40) {
         pressed[len++] = pb_type_button_new(MP_QSTR_RIGHT_UP);