diff --git a/platformio.ini b/platformio.ini
index ee1d133b..91fbac79 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -14,8 +14,8 @@
 ;env_default = heltec
 ;env_default = ttgov1
 ;env_default = ttgov2
-;env_default = ttgov21
-env_default = ttgobeam
+env_default = ttgov21
+;env_default = ttgobeam
 ;env_default = lopy
 ;env_default = lopy4
 ;env_default = fipy
@@ -25,8 +25,9 @@ env_default = ttgobeam
 description = Paxcounter is a proof-of-concept ESP32 device for metering passenger flows in realtime. It counts how many mobile devices are around.
 
 [common_env_data]
-;platform_espressif32 = espressif32@>=1.1.0
-platform_espressif32 = https://github.com/platformio/platform-espressif32.git
+;platform_espressif32 = espressif32@1.0.2
+;platform_espressif32 = espressif32@1.1.2
+platform_espressif32 = https://github.com/platformio/platform-espressif32.git#feature/stage
 board_build.partitions = no_ota.csv
 lib_deps_all =
 lib_deps_display =
@@ -41,8 +42,8 @@ build_flags =
 ; otherwise device may crash in dense environments due to serial buffer overflow
 ;
 ; -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_NONE
- -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_INFO
-;  -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG
+; -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_INFO
+  -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG
 ; -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_VERBOSE
 ;
 ; override lora settings from LMiC library in lmic/config.h and use main.h instead
diff --git a/src/paxcounter.conf b/src/paxcounter.conf
index b0973688..a4e4c00f 100644
--- a/src/paxcounter.conf
+++ b/src/paxcounter.conf
@@ -52,7 +52,7 @@
 #define RGBLUMINOSITY                   30      // 30%
 
 // OLED Display refresh cycle (in Milliseconds)
-#define DISPLAYREFRESH_MS               80      // e.g. 40ms -> 1000/40 = 25 frames per second
+#define DISPLAYREFRESH_MS               40      // e.g. 40ms -> 1000/40 = 25 frames per second
 
 // LMIC settings
 // define hardware independent LMIC settings here, settings of standard library in /lmic/config.h will be ignored