diff --git a/platformio.ini b/platformio.ini
index 5b651c4f5..b8ad836e6 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -69,32 +69,6 @@ build_flags               = ${esp82xx_defaults.build_flags}
                             -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH
                             -DVTABLES_IN_FLASH
 
-[core_2_5_2]
-; *** Esp8266 core for Arduino version 2.5.2
-platform                  = espressif8266@~2.2.2
-build_flags               = ${esp82xx_defaults.build_flags}
-                            -Wl,-Teagle.flash.1m.ld
-; Code optimization see https://github.com/esp8266/Arduino/issues/5790#issuecomment-475672473
-                            -O2
-                            -DBEARSSL_SSL_BASIC
-; nonos-sdk 22x
-                            -DPIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK22x
-; nonos-sdk-pre-v3
-;                            -DPIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK3
-; lwIP 1.4
-;                            -DPIO_FRAMEWORK_ARDUINO_LWIP_HIGHER_BANDWIDTH
-; lwIP 2 - Low Memory
-;                            -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY
-; lwIP 2 - Higher Bandwidth
-;                            -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH
-; lwIP 2 - Higher Bandwidth Low Memory no Features
-;                            -DPIO_FRAMEWORK_ARDUINO_LWIP2_LOW_MEMORY_LOW_FLASH
-; lwIP 2 - Higher Bandwidth no Features (Tasmota default)
-                            -DPIO_FRAMEWORK_ARDUINO_LWIP2_HIGHER_BANDWIDTH_LOW_FLASH
-                            -DVTABLES_IN_FLASH
-                            -fno-exceptions
-                            -lstdc++
-
 [core_pre]
 ; *** Arduino Esp8266 core pre 2.6.x for Tasmota (mqtt reconnects fixed)
 platform                  = https://github.com/Jason2866/platform-espressif8266.git#Tasmota
@@ -215,8 +189,6 @@ build_flags               = ${esp82xx_defaults.build_flags}
 ;build_flags               = ${core_2_3_0.build_flags}
 ;platform                  = ${core_2_4_2.platform}
 ;build_flags               = ${core_2_4_2.build_flags}
-;platform                  = ${core_2_5_2.platform}
-;build_flags               = ${core_2_5_2.build_flags}
 platform                  = ${core_pre.platform}
 build_flags               = ${core_pre.build_flags}
 ;platform                  = ${core_pre_ipv6.platform}