diff --git a/build.py b/build.py
index 28319853..c4f3ccc3 100644
--- a/build.py
+++ b/build.py
@@ -7,15 +7,15 @@ import os.path
 import requests
 from os.path import basename
 from platformio import util
+from SCons.Script import DefaultEnvironment
 
 try:
     import configparser
 except ImportError:
     import ConfigParser as configparser
 
-Import("env")
-
 # get platformio environment variables
+env = DefaultEnvironment()
 config = configparser.ConfigParser()
 config.read("platformio.ini")
 
@@ -66,7 +66,15 @@ myboard = mykeys["board"]
 myuploadspeed = mykeys["upload_speed"]
 env.Replace(BOARD=myboard)
 env.Replace(UPLOAD_SPEED=myuploadspeed)
+
+# re-set partition table
+mypartitiontable = config.get("env", "board_build.partitions")
+board = env.BoardConfig(myboard)
+board.manifest['build']['partitions'] = mypartitiontable
+
+# display target
 print('\033[94m' + "TARGET BOARD: " + myboard + " @ " + myuploadspeed + "bps" + '\033[0m')
+print('\033[94m' + "Partition table: " + mypartitiontable + '\033[0m')
 
 # parse ota key file
 with open(otakeyfile) as myfile:
diff --git a/platformio.ini b/platformio.ini
index 8278a620..18caaddc 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -43,7 +43,7 @@ description = Paxcounter is a device for metering passenger flows in realtime. I
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 1.8.031
+release_version = 1.8.11
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 3
@@ -56,7 +56,7 @@ monitor_speed = 115200
 upload_speed = 115200
 lib_deps_lora =
     ;MCCI LoRaWAN LMIC library@2.3.2
-    https://github.com/mcci-catena/arduino-lmic.git#76f7bd5
+    https://github.com/mcci-catena/arduino-lmic.git
 lib_deps_display =
     U8g2@>=2.26.13
 lib_deps_matrix_display =
@@ -116,7 +116,7 @@ upload_protocol = custom
 upload_protocol = esptool
 
 [env:dev]
-upload_protocol = custom
+upload_protocol = esptool
 build_type = debug
 platform = https://github.com/platformio/platform-espressif32.git#develop
 platform_packages =
diff --git a/src/hal/heltecv2.h b/src/hal/heltecv2.h
index cc7de4d1..adb74981 100644
--- a/src/hal/heltecv2.h
+++ b/src/hal/heltecv2.h
@@ -20,9 +20,13 @@
 #define HAS_LED LED_BUILTIN                           // white LED on board
 #define HAS_BUTTON KEY_BUILTIN                        // button "PROG" on board
 
-#define BAT_MEASURE_ADC ADC2_GPIO13_CHANNEL  // battery probe GPIO pin
-#define BAT_MEASURE_ADC_UNIT 2 // ADC 2
-#define BAT_VOLTAGE_DIVIDER 2 // voltage divider 220k/100k on board
+// caveat: activating ADC2 conflicts with Wifi in current arduino-esp32
+// see https://github.com/espressif/arduino-esp32/issues/3222
+// thus we must waiver of battery monitoring 
+//#define BAT_MEASURE_ADC ADC2_GPIO13_CHANNEL  // battery probe GPIO pin
+//#define BAT_MEASURE_ADC_UNIT 2 // ADC 2
+//#define BAT_VOLTAGE_DIVIDER 2 // voltage divider 220k/100k on board
+
 #define EXT_POWER_SW Vext // switches battery power, Vext control 0 = on / 1 = off
 #define EXT_POWER_ON    0
 //#define EXT_POWER_OFF   1