diff --git a/build.py b/build.py
index 7f2c3a28..f5ab56b8 100644
--- a/build.py
+++ b/build.py
@@ -13,33 +13,43 @@ 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 = str(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
+lmicconfigfile = srcdir.lower() + project_config.get("common", "lmicconfigfile")
+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 = 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 = 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"))
 
@@ -54,6 +64,7 @@ env.Replace(CPPDEFINES=[
     ('WIFI_PASS', '\\"' + mykeys["OTA_WIFI_PASS"] + '\\"'),
     ('BINTRAY_USER', '\\"' + mykeys["BINTRAY_USER"] + '\\"'),
     ('BINTRAY_REPO', '\\"' + mykeys["BINTRAY_REPO"] + '\\"'),
+    ('ARDUINO_LMIC_PROJECT_CONFIG_H', '\"' + lmicconfigfile + '\"')
     ])
 
 # function for pushing new firmware to bintray storage using API
diff --git a/platformio.ini b/platformio.ini
index 8cde83eb..d3b9a9b1 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -6,7 +6,7 @@
 
 ; ---> SELECT TARGET PLATFORM HERE! <---
 [platformio]
-env_default = generic
+;env_default = generic
 ;env_default = ebox
 ;env_default = eboxtube
 ;env_default = ecopower
@@ -16,7 +16,7 @@ env_default = generic
 ;env_default = ttgov2
 ;env_default = ttgov21old
 ;env_default = ttgov21new
-;env_default = ttgobeam
+env_default = ttgobeam
 ;env_default = ttgofox
 ;env_default = lopy
 ;env_default = lopy4
@@ -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
@@ -74,13 +76,9 @@ 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}"'
+    '-DBINTRAY_PACKAGE="$PIOENV"'
     '-DPROGVERSION="${common.release_version}"'
 build_flags_sensors =
     -Llib/Bosch-BSEC/src/esp32/