diff --git a/platformio.ini b/platformio.ini
index e6d53348..be779b28 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -29,7 +29,6 @@ extra_scripts = pre:prebuild.py
 build_flags = 
   -D CORE_DEBUG_LEVEL=0         # For debugging set to 3 and enable debug mode in the app
   -D MIN_PUBLISH_INTERVAL=30    # Minimum interval between clouds updates
-  -D MAIN_HW_EN_PIN=27          # enable the main hardware pin (main sensor)
   -D WAIT_FOR_PM_SENSOR=25      # time of stabilization of PM sensors in seconds
   -D ARDUINO_ESP32_DEV=1        # compatibilty for DFRobot NH3/CO library
   -D DISABLE_ALL_LIBRARY_WARNINGS=1
@@ -54,11 +53,13 @@ board = lolin32
 framework = ${common.framework}
 upload_speed = ${common.upload_speed}
 monitor_speed = ${common.monitor_speed}
-build_flags = ${common.build_flags}
 lib_deps = ${common.lib_deps}
 monitor_filters = ${common.monitor_filters}
 extra_scripts = ${common.extra_scripts}
 board_build.partitions = min_spiffs.csv
+build_flags = 
+  ${common.build_flags}
+  -D MAIN_HW_EN_PIN=27          # enable the main hardware pin (main sensor)
 
 [oled_common]
 extends = esp32_common
@@ -150,12 +151,14 @@ board = seeed_xiao_esp32c3
 
 [esp32s3_common]
 extends = oled_common
+platform = espressif32 @ 6.5.0
 board = esp32-s3-devkitc-1
 board_build.mcu = esp32s3
 board_build.f_cpu = 240000000L
 build_flags = 
-	${common.build_flags}
-	-DBOARD_HAS_PSRAM=1
+  ${common.build_flags}
+  -D BOARD_HAS_PSRAM=1
+  -D MAIN_HW_EN_PIN=3          # enable the main hardware pin (main sensor)
 
 ; ESP32S3 DEVKIT (Also ESP32S3 CAM)
 [env:ESP32S3]  
@@ -164,7 +167,8 @@ extends = esp32s3_common
 [env:TTGO_T7S3]
 extends = esp32s3_common
 build_flags = 
-	${common.build_flags}
+  ${common.build_flags}
+  -D MAIN_HW_EN_PIN=3          # enable the main hardware pin (main sensor)
   -D ARDUINO_USB_CDC_ON_BOOT=1
 
 [env:LORADEVKIT]
@@ -181,17 +185,17 @@ lib_deps =
   ;sabas1080/CayenneLPP @ ^1.1.0
   https://github.com/ElectronicCats/CayenneLPP
 build_flags = 
-	${common.build_flags}
-	-D RXD2=23
-	-D TXD2=17
-	-D hal_init=LMICHAL_init
-	-D ARDUINO_LMIC_PROJECT_CONFIG_H_SUPPRESS
-	-D CFG_eu868=1
-	-D CFG_sx1276_radio=1
-	-D LMIC_PRINTF_TO=Serial
-	-D LMIC_DEBUG_LEVEL=2
-	-D DISABLE_PING=1
-	-D DISABLE_BEACONS=1
-	-D ARDUINO_SAMD_VARIANT_COMPLIANCE=1
-	-D TTGOLORA32V1
+  ${common.build_flags}
+  -D RXD2=23
+  -D TXD2=17
+  -D hal_init=LMICHAL_init
+  -D ARDUINO_LMIC_PROJECT_CONFIG_H_SUPPRESS
+  -D CFG_eu868=1
+  -D CFG_sx1276_radio=1
+  -D LMIC_PRINTF_TO=Serial
+  -D LMIC_DEBUG_LEVEL=2
+  -D DISABLE_PING=1
+  -D DISABLE_BEACONS=1
+  -D ARDUINO_SAMD_VARIANT_COMPLIANCE=1
+  -D TTGOLORA32V1
   ;lib_ignore = gui-utils-tft
diff --git a/src/power.cpp b/src/power.cpp
index e6efad21..3d10c5b1 100644
--- a/src/power.cpp
+++ b/src/power.cpp
@@ -83,9 +83,7 @@ void powerInit() {
     WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); // Disable Brownout Detector 
     // set cpu speed low to save battery
     setCpuFrequencyMhz(240);
-    Serial.print("-->[POWR] CPU Speed: ");
-    Serial.print(getCpuFrequencyMhz());
-    Serial.println(" MHz");  
+    Serial.printf("-->[POWR] CPU Speed:%i MHz\r\n",getCpuFrequencyMhz());
     powerEnableSensors();
 }