diff --git a/platformio.ini b/platformio.ini
index 7a0a051b4..80984a7fb 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -122,8 +122,10 @@ build_flags               = -DUSE_IR_REMOTE_FULL
 
 
 [core]
+; *** Esp8266 Arduino core 2.7.1
+platform                  = espressif8266@2.5.1
 ; *** Esp8266 Arduino core 2.7.2
-platform                  = espressif8266@2.6.0
+;platform                  = espressif8266@2.6.0
 platform_packages         = 
 build_unflags             = ${esp_defaults.build_unflags}
 build_flags               = ${esp82xx_defaults.build_flags}