diff --git a/platformio.ini b/platformio.ini
index b12b3ad00..5c52af18b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -89,6 +89,10 @@ build_flags               = ${esp82xx_defaults.build_flags}
 platform                  = https://github.com/platformio/platform-espressif8266.git#feature/stage
 build_flags               = ${esp82xx_defaults.build_flags}
                             -Wl,-Teagle.flash.1m.ld
+; nonos-sdk 22x
+                             -DPIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK22x
+; nonos-sdk-pre-v3
+;                            -DPIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK3                            
 ; lwIP 1.4 (Default)
 ;                            -DPIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH
 ; lwIP 2 - Low Memory