diff --git a/build.py b/build.py
index 7f2c3a28..e8f3d009 100644
--- a/build.py
+++ b/build.py
@@ -13,33 +13,44 @@ Import("env")
 # get platformio environment variables
 project_config = util.load_project_config()
 
-# check if file loraconf.h is present in source directory
-keyfile = str(env.get("PROJECTSRC_DIR")) + "/loraconf.h"
-if os.path.isfile(keyfile) and os.access(keyfile, os.R_OK):
-    print "Parsing LORAWAN keys from " + keyfile
-else:
-    sys.exit("Missing file loraconf.h, please create it using template loraconf.sample.h! Aborting.")
+# get platformio source path
+srcdir = env.get("PROJECTSRC_DIR").replace("\\", "/")
 
-# check if file ota.conf is present in source directory
-keyfile = str(env.get("PROJECTSRC_DIR")) + "/" + project_config.get("common", "keyfile")
-if os.path.isfile(keyfile) and os.access(keyfile, os.R_OK):
-    print "Parsing OTA keys from " + keyfile
+# check if lmic config file is present in source directory
+lmicconfig = project_config.get("common", "lmicconfigfile")
+lmicconfigfile = os.path.join (srcdir, lmicconfig)
+if os.path.isfile(lmicconfigfile) and os.access(lmicconfigfile, os.R_OK):
+    print "Parsing LMIC configuration from " + lmicconfigfile
 else:
-    sys.exit("Missing file ota.conf, please create it using template ota.sample.conf! Aborting.")
+    sys.exit("Missing file " + lmicconfigfile + ", please create it! Aborting.")
 
-# parse file ota.conf
+# check if lora key file is present in source directory
+lorakeyfile = os.path.join (srcdir, project_config.get("common", "lorakeyfile"))
+if os.path.isfile(lorakeyfile) and os.access(lorakeyfile, os.R_OK):
+    print "Parsing LORAWAN keys from " + lorakeyfile
+else:
+    sys.exit("Missing file " + lorakeyfile + ", please create it! Aborting.")
+
+# check if ota key file is present in source directory
+otakeyfile = os.path.join (srcdir, project_config.get("common", "otakeyfile"))
+if os.path.isfile(otakeyfile) and os.access(otakeyfile, os.R_OK):
+    print "Parsing OTA keys from " + otakeyfile
+else:
+    sys.exit("Missing file " + otakeyfile + ", please create it! Aborting.")
+
+# parse ota key file
 mykeys = {}
-with open(keyfile) as myfile:
+with open(otakeyfile) as myfile:
     for line in myfile:
         key, value = line.partition("=")[::2]
         mykeys[key.strip()] = str(value).strip()
 
-# get bintray user credentials
+# get bintray user credentials from ota key file
 user = mykeys["BINTRAY_USER"]
 repository = mykeys["BINTRAY_REPO"]
 apitoken = mykeys["BINTRAY_API_TOKEN"]
 
-# get bintray upload parameters
+# get bintray upload parameters from platformio environment
 version = project_config.get("common", "release_version")
 package = str(env.get("PIOENV"))
 
@@ -49,11 +60,14 @@ env.Replace(BINTRAY_REPO=repository)
 env.Replace(BINTRAY_API_TOKEN=apitoken)
 
 # get runtime credentials and put them to compiler directive
-env.Replace(CPPDEFINES=[
-    ('WIFI_SSID', '\\"' + mykeys["OTA_WIFI_SSID"] + '\\"'), 
-    ('WIFI_PASS', '\\"' + mykeys["OTA_WIFI_PASS"] + '\\"'),
-    ('BINTRAY_USER', '\\"' + mykeys["BINTRAY_USER"] + '\\"'),
-    ('BINTRAY_REPO', '\\"' + mykeys["BINTRAY_REPO"] + '\\"'),
+env.Append(BUILD_FLAGS=[
+    u'-DWIFI_SSID=\\"' + mykeys["OTA_WIFI_SSID"] + '\\"', 
+    u'-DWIFI_PASS=\\"' + mykeys["OTA_WIFI_PASS"] + '\\"', 
+    u'-DBINTRAY_USER=\\"' + mykeys["BINTRAY_USER"] + '\\"', 
+    u'-DBINTRAY_REPO=\\"' + mykeys["BINTRAY_REPO"] + '\\"', 
+    u'-DBINTRAY_PACKAGE=\\"$PIOENV\\"',
+    u'-DARDUINO_LMIC_PROJECT_CONFIG_H=' + lmicconfig,
+    u'-I \"' + srcdir + '\"'
     ])
 
 # function for pushing new firmware to bintray storage using API
diff --git a/include/ledmatrixdisplay.h b/include/ledmatrixdisplay.h
index 5c44676a..227f300d 100644
--- a/include/ledmatrixdisplay.h
+++ b/include/ledmatrixdisplay.h
@@ -4,7 +4,7 @@
 #include "LEDMatrix.h"
 #include "ledmatrixfonts.h"
 
-extern uint8_t MatrixDisplayIsOn = 0;
+extern uint8_t MatrixDisplayIsOn;
 
 extern LEDMatrix matrix;
 
diff --git a/platformio.ini b/platformio.ini
index 8cde83eb..a413a17b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -40,7 +40,9 @@ debug_level = 3
 upload_protocol = esptool
 ;upload_protocol = custom
 extra_scripts = pre:build.py
-keyfile = ota.conf
+otakeyfile = ota.conf
+lorakeyfile = loraconf.h
+lmicconfigfile = lmic_config.h
 platform_espressif32 = espressif32@1.8.0
 ;platform_espressif32 = https://github.com/platformio/platform-espressif32.git#develop
 board_build.partitions = min_spiffs.csv
@@ -62,7 +64,7 @@ lib_deps_sensors =
 lib_deps_basic =
     ArduinoJson@^5.13.1
     Timezone@^1.2.2
-    RTC@^2.3.0
+    RTC@^2.3.3
     SimpleButton
 lib_deps_all =
     ${common.lib_deps_basic}
@@ -70,17 +72,13 @@ lib_deps_all =
     ${common.lib_deps_display}
     ${common.lib_deps_rgbled}
     ${common.lib_deps_gps}
+    ${common.lib_deps_matrix_display}
 build_flags_basic =
     -include "src/hal/${PIOENV}.h"
     -include "src/paxcounter.conf"
     -w
-    ;use this is you have platformio version >= 4.0.0a15
-    '-DARDUINO_LMIC_PROJECT_CONFIG_H=../../../../../src/lmic_config.h'
-    ;use this is you have platformio version < 4.0.0a15
-    ;'-DARDUINO_LMIC_PROJECT_CONFIG_H=../../../src/lmic_config.h'
     '-DCORE_DEBUG_LEVEL=${common.debug_level}'
     '-DLOG_LOCAL_LEVEL=${common.debug_level}'
-    '-DBINTRAY_PACKAGE="${PIOENV}"'
     '-DPROGVERSION="${common.release_version}"'
 build_flags_sensors =
     -Llib/Bosch-BSEC/src/esp32/
@@ -358,6 +356,7 @@ upload_speed = 921600
 lib_deps =
     ${common.lib_deps_basic}
     ${common.lib_deps_rgbled}
+    ${common.lib_deps_matrix_display}
 build_flags =
     ${common.build_flags_basic}
 upload_protocol = ${common.upload_protocol}
diff --git a/src/ledmatrixdisplay.cpp b/src/ledmatrixdisplay.cpp
index 6a4f39d4..04149b20 100644
--- a/src/ledmatrixdisplay.cpp
+++ b/src/ledmatrixdisplay.cpp
@@ -24,7 +24,7 @@ const FONT_CHAR_INFO *ActiveFontCharInfo = ActiveFontInfo->Descriptors;
 void init_matrix_display(const char *Productname, const char *Version) {
   ESP_LOGI(TAG, "Initializing LED Matrix display");
   matrix.begin(displaybuf, LED_MATRIX_WIDTH, LED_MATRIX_HEIGHT);
-  matrix.reverse();
+  //matrix.reverse();
   matrix.clear();
   DrawNumber(String("0"));
 } // init_display
diff --git a/src/paxcounter.conf b/src/paxcounter.conf
index f4ec3bfb..395f7c79 100644
--- a/src/paxcounter.conf
+++ b/src/paxcounter.conf
@@ -108,12 +108,13 @@
 #define CAYENNE_SENSORREAD              13	    // sensor period configuration
 #define CAYENNE_SENSORENABLE            14	    // sensor enable configuration
 
-// LMIC settings 
-// -> in src/lmic_config.h
-
-// LED Matrix display settings. Pin numbers work fine for Wemos Lolin32 board (all used pins are on 1 side of the board)
+// LED Matrix display settings. 
 // Note: LED Matrix will only show number of found devices, no other information will be shown for now
 //#define HAS_MATRIX_DISPLAY              1       // Uncomment to enable LED matrix display output
+#define LED_MATRIX_WIDTH                64      // Width in pixels (LEDs) of your display
+#define LED_MATRIX_HEIGHT               16      // Height in pixels (LEDs ) of your display
+
+// Pin numbers work fine for Wemos Lolin32 board (all used pins are on 1 side of the board)
 #define MATRIX_DISPLAY_SCAN_US          500     // Matrix display scan rate in microseconds (1ms is about 'acceptable')
 #define LED_MATRIX_LATCHPIN             13      // Connects to LAT pin on display
 #define LED_MATRIX_CLOCKPIN             32      // Connects to CLK pin on display
@@ -122,6 +123,4 @@
 #define LED_MATRIX_LB_74138             27      // Connects to LB pin on display
 #define LED_MATRIX_LC_74138             25      // Connects to LC pin on display
 #define LED_MATRIX_LD_74138             26      // Connects to LD pin on display
-#define LED_MATRIX_DATA_R1              33      // Connects to R1 pin on display
-#define LED_MATRIX_WIDTH                64      // Width in pixels (LEDs) of your display
-#define LED_MATRIX_HEIGHT               16      // Height in pixels (LEDs ) of your display
\ No newline at end of file
+#define LED_MATRIX_DATA_R1              33      // Connects to R1 pin on display
\ No newline at end of file