diff --git a/esp32/include/ControllerConfiguration.h b/esp32/include/ControllerConfiguration.h
index 8afcebc..d3ef8ff 100644
--- a/esp32/include/ControllerConfiguration.h
+++ b/esp32/include/ControllerConfiguration.h
@@ -96,7 +96,7 @@
 
 #define FIRMWARE_BASENAME "PlantControl"
 #define FIRMWARE_NAME FIRMWARE_BASENAME FIRMWARE_FEATURE1 FIRMWARE_FEATURE2
-#define FIRMWARE_VERSION "2.71 HW0.10b" 
+#define FIRMWARE_VERSION "3.01 HW0.10b" 
 
 #define MOIST_SENSOR_MAX_FRQ               5200 // 60kHz (500Hz margin)
 #define MOIST_SENSOR_MIN_FRQ                500 // 0.5kHz (500Hz margin)
diff --git a/esp32/platformio.ini b/esp32/platformio.ini
index af2722e..f878f58 100644
--- a/esp32/platformio.ini
+++ b/esp32/platformio.ini
@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [env:esp32doit-devkit-v1]
-platform = espressif32@4.2.0
+platform = espressif32@6.3.2
 board = esp32doit-devkit-v1
 framework = arduino
 build_flags = -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY
diff --git a/esp32/src/MQTTUtils.cpp b/esp32/src/MQTTUtils.cpp
index 7cdabfb..1041ca2 100644
--- a/esp32/src/MQTTUtils.cpp
+++ b/esp32/src/MQTTUtils.cpp
@@ -33,6 +33,7 @@ void log(int level, String message, int statusCode)
     delete logTopic;
   }
   Serial << statusCode << "@" << level << " : " << message << endl;
+  Serial.flush();
 }