Update Arduino core to the latest v3.0 // Issue #249

Additionally resolves #242

Author: valeros

boards/agruminolemon.json

@@ -0,0 +1,33 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "eagle.flash.4m1m.ld"
+    },
+    "core": "esp8266",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_AGRUMINO_LEMON_V4",
+    "f_cpu": "80000000L",
+    "f_flash": "40000000L",
+    "flash_mode": "dio",
+    "mcu": "esp8266",
+    "variant": "agruminolemonv4"
+  },
+  "connectivity": [
+    "wifi"
+  ],
+  "frameworks": [
+    "arduino",
+    "simba",
+    "esp8266-rtos-sdk",
+    "esp8266-nonos-sdk"
+  ],
+  "name": "Lifely Agrumino Lemon v4",
+  "upload": {
+    "maximum_ram_size": 81920,
+    "maximum_size": 4194304,
+    "require_upload_port": true,
+    "resetmethod": "nodemcu",
+    "speed": 115200
+  },
+  "url": "https://www.lifely.cc/lifely-3-0/",
+  "vendor": "Lifely"
+}

boards/gen4iod.json

@@ -4,7 +4,7 @@
       "ldscript": "eagle.flash.512k64.ld"
     },
     "core": "esp8266",
-    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_GEN4_IOD",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_GEN4_IOD",
     "f_cpu": "80000000L",
     "f_flash": "40000000L",
     "flash_mode": "qio",

boards/huzzah.json

@@ -4,7 +4,7 @@
       "ldscript": "eagle.flash.4m1m.ld"
     },
     "core": "esp8266",
-    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_ESP12",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_ADAFRUIT_HUZZAH",
     "f_cpu": "80000000L",
     "f_flash": "40000000L",
     "flash_mode": "qio",

boards/inventone.json

@@ -4,7 +4,7 @@
       "ldscript": "eagle.flash.4m1m.ld"
     },
     "core": "esp8266",
-    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_GENERIC",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_INVENT_ONE",
     "f_cpu": "80000000L",
     "f_flash": "40000000L",
     "flash_mode": "dio",

boards/nodemcuv2.json

@@ -4,7 +4,7 @@
       "ldscript": "eagle.flash.4m1m.ld"
     },
     "core": "esp8266",
-    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_NODEMCU",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_NODEMCU_ESP12E",
     "f_cpu": "80000000L",
     "f_flash": "40000000L",
     "flash_mode": "dio",

boards/wifinfo.json

@@ -4,7 +4,7 @@
       "ldscript": "eagle.flash.1m256.ld"
     },
     "core": "esp8266",
-    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_WIFINFO",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_WIFINFO",
     "f_cpu": "80000000L",
     "f_flash": "40000000L",
     "flash_mode": "qio",

boards/xinabox_cw01.json

@@ -4,7 +4,7 @@
       "ldscript": "eagle.flash.4m1m.ld"
     },
     "core": "esp8266",
-    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_GENERIC",
+    "extra_flags": "-DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_XINABOX_CW01",
     "f_cpu": "80000000L",
     "f_flash": "40000000L",
     "flash_mode": "qio",

platform.json

@@ -46,14 +46,14 @@
     "toolchain-xtensa": {
       "type": "toolchain",
       "owner": "platformio",
-      "version": "~2.40802.0",
+      "version": "~2.100200.0",
       "optionalVersions": ["~1.40802.0"]
     },
     "framework-arduinoespressif8266": {
       "type": "framework",
       "optional": true,
       "owner": "platformio",
-      "version": "~3.20704.0"
+      "version": "~3.30000.0"
     },
     "framework-esp8266-rtos-sdk": {
       "type": "framework",