Index: firmware/App/DDCommon.h
===================================================================
diff -u -r58ab39a642ac876eb735c98db5186bf0de0e9066 -r89c8709e3b27648926fbb20f25c9a67cbeb99adc
--- firmware/App/DDCommon.h	(.../DDCommon.h)	(revision 58ab39a642ac876eb735c98db5186bf0de0e9066)
+++ firmware/App/DDCommon.h	(.../DDCommon.h)	(revision 89c8709e3b27648926fbb20f25c9a67cbeb99adc)
@@ -1,17 +1,17 @@
 /**************************************************************************
 *
-* Copyright (c) 2024-2024 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2024-2026 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    DDCommon.h
 *
-* @author  (last)      Vinayakam Mani
-* @date    (last)      06-Aug-2024
+* @author  (last)      Michael Garthwaite
+* @date    (last)      02-Feb-2026
 *
 * @author  (original)  Vinayakam Mani
-* @date    (original)  06-Aug-2024
+* @date    (original)  07-Aug-2024
 *
 ***************************************************************************/
 
@@ -22,10 +22,10 @@
 
 // ********** version **********
 
-#define DD_VERSION_MAJOR    0
-#define DD_VERSION_MINOR    0
-#define DD_VERSION_MICRO    0
-#define DD_VERSION_BUILD    19
+#define DD_VERSION_MAJOR        0
+#define DD_VERSION_MINOR        0
+#define DD_VERSION_MICRO        0
+#define DD_VERSION_BUILD  40
 
 // ********** development build switches **********
 
@@ -45,18 +45,20 @@
 //Uncomment below once characterization/study completed
 //#define ENABLE_ALARM_2
 
-//Uncomment below for spent chamber filling
-//#define __SPENT_CHAMBER_FILL__    1
-
 //Uncomment below for bicarb chamber filling
 //#define __BICARB_CHAMBER_FILL__   1
 
 //Uncomment below for Maxon controller speed change
-//#define __MAXON_SPEED_UPDATE__    1
+#define __MAXON_SPEED_UPDATE__    1
 
+//UnComment below for DryBicarb testing
+#define __DRY_BICARB__            1
+
 //Uncomment below to disable heaters debug message
 #define __HEATERS_DEBUG__         1
 
+//Uncomment below to disable Teensy conductivity driver
+#define __TEENSY_CONDUCTIVITY_DRIVER__  1
 
     #include <stdio.h>
     #include <strings.h>