diff --git a/platformio.ini b/platformio.ini
index 87989d63a..3b364ba13 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -16,10 +16,12 @@ core_build_flags =
   -D NDEBUG
   -D ARDUINO_ARCH_ESP32=1
   -D ESP32=1
+  ; -std=gnu++17
   ; -Os
 
 ; core_unbuild_flags = -std=gnu++11 
-core_unbuild_flags = 
+; core_unbuild_flags = -std=gnu++17 
+core_unbuild_flags =
 
 ; my_build_flags is set in pio_local.ini
 my_build_flags =
@@ -56,7 +58,7 @@ check_flags =
 [env:ci]
 extra_scripts = scripts/rename_fw.py
 board = esp32dev
-platform = espressif32@5.2.0
+platform = espressif32
 board_build.partitions = esp32_partition_4M.csv
 board_build.filesystem = littlefs 
 build_flags = ${common.build_flags}
@@ -67,7 +69,7 @@ extra_scripts =
   pre:scripts/build_interface.py
   scripts/rename_fw.py
 board = esp32dev
-platform = espressif32@5.2.0
+platform = espressif32
 board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
 build_flags = ${common.build_flags}
@@ -78,7 +80,7 @@ extra_scripts =
   pre:scripts/build_interface.py
   scripts/rename_fw.py
 board = esp32dev
-platform = espressif32@5.2.0
+platform = espressif32
 board_upload.flash_size = 16MB
 board_build.partitions = esp32_partition_16M.csv
 build_flags = ${common.build_flags}
@@ -89,7 +91,7 @@ extra_scripts =
   pre:scripts/build_interface.py
   scripts/rename_fw.py
 board = lolin_c3_mini
-platform = espressif32@5.2.0
+platform = espressif32
 board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
 build_flags = ${common.build_flags}
@@ -102,7 +104,7 @@ extra_scripts =
   pre:scripts/build_interface.py
   scripts/rename_fw.py
 board = lolin_c3_mini
-platform = espressif32@5.2.0
+platform = espressif32
 board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
 build_flags = ${common.build_flags} -DBOARD_C3_MINI_V1
@@ -113,7 +115,7 @@ extra_scripts =
   pre:scripts/build_interface.py
   scripts/rename_fw.py
 board = lolin_s2_mini
-platform = espressif32@5.2.0
+platform = espressif32
 board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
 build_flags = ${common.build_flags}