diff --git a/platformio.ini b/platformio.ini
index 999cb7a97..543a19fc1 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -17,11 +17,11 @@ core_build_flags =
   -D NDEBUG
   -D ARDUINO_ARCH_ESP32=1
   -D ESP32=1
-  -std=gnu++17
+  ; -std=gnu++17
 
-core_unbuild_flags = -std=gnu++11 
+; core_unbuild_flags = -std=gnu++11 
 ; core_unbuild_flags = -std=gnu++17 
-; core_unbuild_flags =
+core_unbuild_flags =
 
 ; my_build_flags is set in pio_local.ini
 my_build_flags =
@@ -40,8 +40,8 @@ unbuild_flags =
   ${common.core_unbuild_flags}
 
 [espressi32_base]
-platform = espressif32@6.0.1
-; platform = espressif32@5.2.0
+; platform = espressif32@6.0.1
+platform = espressif32@5.2.0
 ; platform = espressif32@5.3.0
 framework = arduino