check: reduce verbosity, exclude libs

platformio.ini

@@ -98,6 +98,8 @@ board_build.filesystem = littlefs
 platform = espressif32
 board = featheresp32
 framework = arduino
+check_flags =
+  cppcheck: --inline-suppr --suppress=*:*/.pio/*
 src_build_flags = 
   ${common_env_data.src_build_flags}
   ${config_nocolor.src_build_flags}
@@ -116,6 +118,8 @@ extends = env:esp8266
 board = esp12e
 
 [env:esp8266]
+check_flags =
+  cppcheck: --inline-suppr --suppress=*:*/.pio/*
 platform = espressif8266
 board = huzzah
 framework = arduino