diff --git a/Grbl_Esp32/data/config.yaml b/Grbl_Esp32/data/config.yaml
index def66afa..d0109c16 100644
--- a/Grbl_Esp32/data/config.yaml
+++ b/Grbl_Esp32/data/config.yaml
@@ -5,4 +5,7 @@ axes:
   number_axis: 3
 
 coolant:
-  flood: gpio.2
+  flood: gpio.26:low
+
+probe: 
+    pin: gpio.12
diff --git a/Grbl_Esp32/src/CoolantControl.cpp b/Grbl_Esp32/src/CoolantControl.cpp
index 3943d690..9496632b 100644
--- a/Grbl_Esp32/src/CoolantControl.cpp
+++ b/Grbl_Esp32/src/CoolantControl.cpp
@@ -28,8 +28,10 @@ void CoolantControl::init() {
     static bool init_message = true;  // used to show messages only once.
 
     if (init_message) {
-        grbl_msg_sendf(CLIENT_SERIAL, MsgLevel::Info, "Flood coolant on pin %s", flood_.name().c_str());
-        grbl_msg_sendf(CLIENT_SERIAL, MsgLevel::Info, "Mist coolant on pin %s", mist_.name().c_str());
+        if (!flood_.undefined())
+            grbl_msg_sendf(CLIENT_SERIAL, MsgLevel::Info, "Flood coolant on pin %s", flood_.name().c_str());
+        if (!mist_.undefined())
+            grbl_msg_sendf(CLIENT_SERIAL, MsgLevel::Info, "Mist coolant on pin %s", mist_.name().c_str());
         init_message = false;
     }
 
diff --git a/platformio.ini b/platformio.ini
index cc2807df..8e85cd1e 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -1,14 +1,22 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
 [platformio]
-src_dir=Grbl_Esp32
-lib_dir=libraries
-test_dir=Grbl_Esp32/test
-data_dir=Grbl_Esp32/data
-default_envs=release
+src_dir = Grbl_Esp32
+lib_dir = libraries
+data_dir = Grbl_Esp32/data
+default_envs = release
 ;extra_configs=debug.ini
-build_dir = Firmware
 
 [common_env_data]
-lib_deps_builtin =
+lib_deps_builtin = 
 	ArduinoOTA
 	BluetoothSerial
 	DNSServer
@@ -25,40 +33,41 @@ lib_deps_builtin =
 	WiFiClientSecure
 
 [common]
-build_flags =
-	;-DMACHINE_FILENAME=test_drive.h ;Remove ";" from the beginning of this line and specify the machine file
+build_flags = 
+    ;-DMACHINE_FILENAME=test_drive.h ;Remove ";" from the beginning of this line and specify the machine file
 	-DCORE_DEBUG_LEVEL=0
 	-Wno-unused-variable
 	-Wno-unused-function
 
-
 [env]
-lib_deps =
-	TMCStepper@>=0.7.0,<1.0.0
-platform = espressif32
+;lib_deps = 
+;	TMCStepper@>=0.7.0,<1.0.0
+platform = espressif32@3.0.0 ; temporary fix for lost uart rx characters
 board = esp32dev
 framework = arduino
 upload_speed = 921600
 board_build.partitions = min_spiffs.csv
 monitor_speed = 115200
-monitor_flags =
+monitor_flags = 
 	--eol=CRLF
 	--echo
 	--filter=esp32_exception_decoder
 board_build.f_cpu = 240000000L
-; set frequency to 80MHz
 board_build.f_flash = 80000000L
 board_build.flash_mode = qio
 build_flags = ${common.build_flags}
-src_filter =
-    +<*.h> +<*.s> +<*.S> +<*.cpp> +<*.c> +<*.ino> +<src/>
-    -<.git/> -<data/> -<test/> -<tests/> -<Custom/>
+src_filter = 
+	+<*.h> +<*.s> +<*.S> +<*.cpp> +<*.c> +<*.ino> +<src/>
+	-<.git/> -<data/> -<test/> -<tests/>
 
 [env:release]
+lib_deps = 
+    TMCStepper@>=0.7.0,<1.0.0
+    ESP8266 and ESP32 OLED driver for SSD1306 displays@^4.2.0
 
 [env:debug]
 build_type = debug
-
-[env:test]
-build_type = debug
-test_build_project_src = true
\ No newline at end of file
+lib_deps = 
+    TMCStepper@>=0.7.0,<1.0.0
+    ESP8266 and ESP32 OLED driver for SSD1306 displays@^4.2.0
+    
\ No newline at end of file