diff -r 07cc86900473 -r 49eb753a958b thermferm/panel.c
--- a/thermferm/panel.c	Sat Mar 23 09:31:01 2024 +0100
+++ b/thermferm/panel.c	Sat Mar 23 12:18:14 2024 +0100
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Copyright (C) 2014
+ * Copyright (C) 2014-2024
  *   
  * Michiel Broek <mbroek at mbse dot eu>
  *
@@ -51,6 +51,7 @@
 extern uint16_t		keys;
 extern uint16_t		leds;
 extern int		slcdHandle;
+extern pthread_mutex_t  mutexes[5];
 
 int			Key_Enter = FALSE;
 int			Key_Enter_Long = FALSE;
@@ -186,13 +187,9 @@
 	    /*
 	     * Any key is pressed.
 	     */
-#ifdef HAVE_WIRINGPI_H
-	    piLock(LOCK_LCD);
-#endif
+	    pthread_mutex_lock(&mutexes[LOCK_LCD]);
 	    setBacklight(1);
-#ifdef HAVE_WIRINGPI_H
-	    piUnlock(LOCK_LCD);
-#endif
+	    pthread_mutex_unlock(&mutexes[LOCK_LCD]);
 	    Backlight = LCD_SLEEP;
 	    menutimer = 0;
 	} else {
@@ -208,21 +205,15 @@
 
 	    if (AnyKey == FALSE) {
 		if (Backlight == 1) {
-#ifdef HAVE_WIRINGPI_H
-		    piLock(LOCK_LCD);
-#endif
+		    pthread_mutex_lock(&mutexes[LOCK_LCD]);
 		    setBacklight(0);
-#ifdef HAVE_WIRINGPI_H
-		    piUnlock(LOCK_LCD);
-#endif
+		    pthread_mutex_unlock(&mutexes[LOCK_LCD]);
 		}
 		if (Backlight > 0) {
 		    Backlight--;
 		}
 
-#ifdef HAVE_WIRINGPI_H
-		piLock(LOCK_MENU);
-#endif
+		pthread_mutex_lock(&mutexes[LOCK_MENU]);
 	    	if (setupmenu != MENU_NONE) {
 		    if (menutimer < MENU_TIMEOUT)
 			menutimer++;
@@ -230,9 +221,7 @@
 			setupmenu = MENU_NONE;
 		    }
 		}
-#ifdef HAVE_WIRINGPI_H
-		piUnlock(LOCK_MENU);
-#endif
+		pthread_mutex_unlock(&mutexes[LOCK_MENU]);
 	    }
 	}