diff --git a/boards.txt b/boards.txt
index 5b6bf365b0..37fcbe69d1 100644
--- a/boards.txt
+++ b/boards.txt
@@ -4245,3 +4245,224 @@ wifiduino.menu.UploadSpeed.460800.upload.speed=460800
 wifiduino.menu.UploadSpeed.512000.windows=512000
 wifiduino.menu.UploadSpeed.512000.upload.speed=512000
 
+##############################################################
+wifi_slot.name=Amperka WiFi Slot
+wifi_slot.build.board=AMPERKA_WIFI_SLOT
+wifi_slot.build.variant=wifi_slot
+wifi_slot.upload.tool=esptool
+wifi_slot.upload.maximum_data_size=81920
+wifi_slot.upload.wait_for_upload_port=true
+wifi_slot.upload.erase_cmd=
+wifi_slot.serial.disableDTR=true
+wifi_slot.serial.disableRTS=true
+wifi_slot.build.mcu=esp8266
+wifi_slot.build.core=esp8266
+wifi_slot.build.spiffs_pagesize=256
+wifi_slot.build.debug_port=
+wifi_slot.build.debug_level=
+wifi_slot.menu.CpuFrequency.80=80 MHz
+wifi_slot.menu.CpuFrequency.80.build.f_cpu=80000000L
+wifi_slot.menu.CpuFrequency.160=160 MHz
+wifi_slot.menu.CpuFrequency.160.build.f_cpu=160000000L
+wifi_slot.menu.VTable.flash=Flash
+wifi_slot.menu.VTable.flash.build.vtable_flags=-DVTABLES_IN_FLASH
+wifi_slot.menu.VTable.heap=Heap
+wifi_slot.menu.VTable.heap.build.vtable_flags=-DVTABLES_IN_DRAM
+wifi_slot.menu.VTable.iram=IRAM
+wifi_slot.menu.VTable.iram.build.vtable_flags=-DVTABLES_IN_IRAM
+wifi_slot.upload.resetmethod=nodemcu
+wifi_slot.menu.FlashFreq.40=40MHz
+wifi_slot.menu.FlashFreq.40.build.flash_freq=40
+wifi_slot.menu.FlashFreq.80=80MHz
+wifi_slot.menu.FlashFreq.80.build.flash_freq=80
+wifi_slot.menu.FlashMode.qio=QIO
+wifi_slot.menu.FlashMode.qio.build.flash_mode=qio
+wifi_slot.menu.FlashMode.qout=QOUT
+wifi_slot.menu.FlashMode.qout.build.flash_mode=qout
+wifi_slot.menu.FlashMode.dio=DIO
+wifi_slot.menu.FlashMode.dio.build.flash_mode=dio
+wifi_slot.menu.FlashMode.dout=DOUT
+wifi_slot.menu.FlashMode.dout.build.flash_mode=dout
+wifi_slot.menu.FlashSize.1M0=1M (no SPIFFS)
+wifi_slot.menu.FlashSize.1M0.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M0.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M0.build.flash_ld=eagle.flash.1m0.ld
+wifi_slot.menu.FlashSize.1M0.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M0.upload.maximum_size=1023984
+wifi_slot.menu.FlashSize.1M0.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M64=1M (64K SPIFFS)
+wifi_slot.menu.FlashSize.1M64.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M64.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M64.build.flash_ld=eagle.flash.1m64.ld
+wifi_slot.menu.FlashSize.1M64.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M64.upload.maximum_size=958448
+wifi_slot.menu.FlashSize.1M64.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M64.build.spiffs_start=0xEB000
+wifi_slot.menu.FlashSize.1M64.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M64.build.spiffs_blocksize=4096
+wifi_slot.menu.FlashSize.1M128=1M (128K SPIFFS)
+wifi_slot.menu.FlashSize.1M128.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M128.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M128.build.flash_ld=eagle.flash.1m128.ld
+wifi_slot.menu.FlashSize.1M128.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M128.upload.maximum_size=892912
+wifi_slot.menu.FlashSize.1M128.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M128.build.spiffs_start=0xDB000
+wifi_slot.menu.FlashSize.1M128.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M128.build.spiffs_blocksize=4096
+wifi_slot.menu.FlashSize.1M144=1M (144K SPIFFS)
+wifi_slot.menu.FlashSize.1M144.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M144.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M144.build.flash_ld=eagle.flash.1m144.ld
+wifi_slot.menu.FlashSize.1M144.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M144.upload.maximum_size=876528
+wifi_slot.menu.FlashSize.1M144.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M144.build.spiffs_start=0xD7000
+wifi_slot.menu.FlashSize.1M144.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M144.build.spiffs_blocksize=4096
+wifi_slot.menu.FlashSize.1M160=1M (160K SPIFFS)
+wifi_slot.menu.FlashSize.1M160.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M160.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M160.build.flash_ld=eagle.flash.1m160.ld
+wifi_slot.menu.FlashSize.1M160.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M160.upload.maximum_size=860144
+wifi_slot.menu.FlashSize.1M160.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M160.build.spiffs_start=0xD3000
+wifi_slot.menu.FlashSize.1M160.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M160.build.spiffs_blocksize=4096
+wifi_slot.menu.FlashSize.1M192=1M (192K SPIFFS)
+wifi_slot.menu.FlashSize.1M192.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M192.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M192.build.flash_ld=eagle.flash.1m192.ld
+wifi_slot.menu.FlashSize.1M192.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M192.upload.maximum_size=827376
+wifi_slot.menu.FlashSize.1M192.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M192.build.spiffs_start=0xCB000
+wifi_slot.menu.FlashSize.1M192.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M192.build.spiffs_blocksize=4096
+wifi_slot.menu.FlashSize.1M256=1M (256K SPIFFS)
+wifi_slot.menu.FlashSize.1M256.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M256.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M256.build.flash_ld=eagle.flash.1m256.ld
+wifi_slot.menu.FlashSize.1M256.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M256.upload.maximum_size=761840
+wifi_slot.menu.FlashSize.1M256.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M256.build.spiffs_start=0xBB000
+wifi_slot.menu.FlashSize.1M256.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M256.build.spiffs_blocksize=4096
+wifi_slot.menu.FlashSize.1M512=1M (512K SPIFFS)
+wifi_slot.menu.FlashSize.1M512.build.flash_size=1M
+wifi_slot.menu.FlashSize.1M512.build.flash_size_bytes=0x100000
+wifi_slot.menu.FlashSize.1M512.build.flash_ld=eagle.flash.1m512.ld
+wifi_slot.menu.FlashSize.1M512.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.1M512.upload.maximum_size=499696
+wifi_slot.menu.FlashSize.1M512.build.rfcal_addr=0xFC000
+wifi_slot.menu.FlashSize.1M512.build.spiffs_start=0x7B000
+wifi_slot.menu.FlashSize.1M512.build.spiffs_end=0xFB000
+wifi_slot.menu.FlashSize.1M512.build.spiffs_blocksize=8192
+wifi_slot.menu.FlashSize.2M=2M (1M SPIFFS)
+wifi_slot.menu.FlashSize.2M.build.flash_size=2M
+wifi_slot.menu.FlashSize.2M.build.flash_size_bytes=0x200000
+wifi_slot.menu.FlashSize.2M.build.flash_ld=eagle.flash.2m.ld
+wifi_slot.menu.FlashSize.2M.build.spiffs_pagesize=256
+wifi_slot.menu.FlashSize.2M.upload.maximum_size=1044464
+wifi_slot.menu.FlashSize.2M.build.rfcal_addr=0x1FC000
+wifi_slot.menu.FlashSize.2M.build.spiffs_start=0x100000
+wifi_slot.menu.FlashSize.2M.build.spiffs_end=0x1FB000
+wifi_slot.menu.FlashSize.2M.build.spiffs_blocksize=8192
+wifi_slot.menu.LwIPVariant.v2mss536=v2 Lower Memory
+wifi_slot.menu.LwIPVariant.v2mss536.build.lwip_include=lwip2/include
+wifi_slot.menu.LwIPVariant.v2mss536.build.lwip_lib=-llwip2
+wifi_slot.menu.LwIPVariant.v2mss536.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=536
+wifi_slot.menu.LwIPVariant.v2mss1460=v2 Higher Bandwidth
+wifi_slot.menu.LwIPVariant.v2mss1460.build.lwip_include=lwip2/include
+wifi_slot.menu.LwIPVariant.v2mss1460.build.lwip_lib=-llwip2_1460
+wifi_slot.menu.LwIPVariant.v2mss1460.build.lwip_flags=-DLWIP_OPEN_SRC -DTCP_MSS=1460
+wifi_slot.menu.LwIPVariant.Prebuilt=v1.4 Higher Bandwidth
+wifi_slot.menu.LwIPVariant.Prebuilt.build.lwip_lib=-llwip_gcc
+wifi_slot.menu.LwIPVariant.Prebuilt.build.lwip_flags=-DLWIP_OPEN_SRC
+wifi_slot.menu.LwIPVariant.OpenSource=v1.4 Compile from source
+wifi_slot.menu.LwIPVariant.OpenSource.build.lwip_lib=-llwip_src
+wifi_slot.menu.LwIPVariant.OpenSource.build.lwip_flags=-DLWIP_OPEN_SRC
+wifi_slot.menu.LwIPVariant.OpenSource.recipe.hooks.sketch.prebuild.1.pattern=make -C "{runtime.platform.path}/tools/sdk/lwip/src" install TOOLS_PATH="{runtime.tools.xtensa-lx106-elf-gcc.path}/bin/xtensa-lx106-elf-"
+wifi_slot.menu.Debug.Disabled=Disabled
+wifi_slot.menu.Debug.Disabled.build.debug_port=
+wifi_slot.menu.Debug.Serial=Serial
+wifi_slot.menu.Debug.Serial.build.debug_port=-DDEBUG_ESP_PORT=Serial
+wifi_slot.menu.Debug.Serial1=Serial1
+wifi_slot.menu.Debug.Serial1.build.debug_port=-DDEBUG_ESP_PORT=Serial1
+wifi_slot.menu.DebugLevel.None____=None
+wifi_slot.menu.DebugLevel.None____.build.debug_level=
+wifi_slot.menu.DebugLevel.SSL=SSL
+wifi_slot.menu.DebugLevel.SSL.build.debug_level= -DDEBUG_ESP_SSL
+wifi_slot.menu.DebugLevel.TLS_MEM=TLS_MEM
+wifi_slot.menu.DebugLevel.TLS_MEM.build.debug_level= -DDEBUG_ESP_TLS_MEM
+wifi_slot.menu.DebugLevel.HTTP_CLIENT=HTTP_CLIENT
+wifi_slot.menu.DebugLevel.HTTP_CLIENT.build.debug_level= -DDEBUG_ESP_HTTP_CLIENT
+wifi_slot.menu.DebugLevel.HTTP_SERVER=HTTP_SERVER
+wifi_slot.menu.DebugLevel.HTTP_SERVER.build.debug_level= -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLTLS_MEM=SSL+TLS_MEM
+wifi_slot.menu.DebugLevel.SSLTLS_MEM.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_TLS_MEM
+wifi_slot.menu.DebugLevel.SSLHTTP_CLIENT=SSL+HTTP_CLIENT
+wifi_slot.menu.DebugLevel.SSLHTTP_CLIENT.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_HTTP_CLIENT
+wifi_slot.menu.DebugLevel.SSLHTTP_SERVER=SSL+HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLHTTP_SERVER.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.TLS_MEMHTTP_CLIENT=TLS_MEM+HTTP_CLIENT
+wifi_slot.menu.DebugLevel.TLS_MEMHTTP_CLIENT.build.debug_level= -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_CLIENT
+wifi_slot.menu.DebugLevel.TLS_MEMHTTP_SERVER=TLS_MEM+HTTP_SERVER
+wifi_slot.menu.DebugLevel.TLS_MEMHTTP_SERVER.build.debug_level= -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.HTTP_CLIENTHTTP_SERVER=HTTP_CLIENT+HTTP_SERVER
+wifi_slot.menu.DebugLevel.HTTP_CLIENTHTTP_SERVER.build.debug_level= -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_CLIENT=SSL+TLS_MEM+HTTP_CLIENT
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_CLIENT.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_CLIENT
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_SERVER=SSL+TLS_MEM+HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_SERVER.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLHTTP_CLIENTHTTP_SERVER=SSL+HTTP_CLIENT+HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLHTTP_CLIENTHTTP_SERVER.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.TLS_MEMHTTP_CLIENTHTTP_SERVER=TLS_MEM+HTTP_CLIENT+HTTP_SERVER
+wifi_slot.menu.DebugLevel.TLS_MEMHTTP_CLIENTHTTP_SERVER.build.debug_level= -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_CLIENTHTTP_SERVER=SSL+TLS_MEM+HTTP_CLIENT+HTTP_SERVER
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_CLIENTHTTP_SERVER.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_SERVER
+wifi_slot.menu.DebugLevel.CORE=CORE
+wifi_slot.menu.DebugLevel.CORE.build.debug_level= -DDEBUG_ESP_CORE
+wifi_slot.menu.DebugLevel.WIFI=WIFI
+wifi_slot.menu.DebugLevel.WIFI.build.debug_level= -DDEBUG_ESP_WIFI
+wifi_slot.menu.DebugLevel.HTTP_UPDATE=HTTP_UPDATE
+wifi_slot.menu.DebugLevel.HTTP_UPDATE.build.debug_level= -DDEBUG_ESP_HTTP_UPDATE
+wifi_slot.menu.DebugLevel.UPDATER=UPDATER
+wifi_slot.menu.DebugLevel.UPDATER.build.debug_level= -DDEBUG_ESP_UPDATER
+wifi_slot.menu.DebugLevel.OTA=OTA
+wifi_slot.menu.DebugLevel.OTA.build.debug_level= -DDEBUG_ESP_OTA
+wifi_slot.menu.DebugLevel.OOM=OOM
+wifi_slot.menu.DebugLevel.OOM.build.debug_level= -DDEBUG_ESP_OOM
+wifi_slot.menu.DebugLevel.COREWIFIHTTP_UPDATEUPDATEROTAOOM=CORE+WIFI+HTTP_UPDATE+UPDATER+OTA+OOM
+wifi_slot.menu.DebugLevel.COREWIFIHTTP_UPDATEUPDATEROTAOOM.build.debug_level= -DDEBUG_ESP_CORE -DDEBUG_ESP_WIFI -DDEBUG_ESP_HTTP_UPDATE -DDEBUG_ESP_UPDATER -DDEBUG_ESP_OTA -DDEBUG_ESP_OOM
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_CLIENTHTTP_SERVERCOREWIFIHTTP_UPDATEUPDATEROTAOOM=SSL+TLS_MEM+HTTP_CLIENT+HTTP_SERVER+CORE+WIFI+HTTP_UPDATE+UPDATER+OTA+OOM
+wifi_slot.menu.DebugLevel.SSLTLS_MEMHTTP_CLIENTHTTP_SERVERCOREWIFIHTTP_UPDATEUPDATEROTAOOM.build.debug_level= -DDEBUG_ESP_SSL -DDEBUG_ESP_TLS_MEM -DDEBUG_ESP_HTTP_CLIENT -DDEBUG_ESP_HTTP_SERVER -DDEBUG_ESP_CORE -DDEBUG_ESP_WIFI -DDEBUG_ESP_HTTP_UPDATE -DDEBUG_ESP_UPDATER -DDEBUG_ESP_OTA -DDEBUG_ESP_OOM
+wifi_slot.menu.DebugLevel.NoAssert-NDEBUG=NoAssert-NDEBUG
+wifi_slot.menu.DebugLevel.NoAssert-NDEBUG.build.debug_level= -DNDEBUG
+wifi_slot.menu.FlashErase.none=Only Sketch
+wifi_slot.menu.FlashErase.none.upload.erase_cmd=
+wifi_slot.menu.FlashErase.sdk=Sketch + WiFi Settings
+wifi_slot.menu.FlashErase.sdk.upload.erase_cmd=-ca "{build.rfcal_addr}" -cz 0x4000
+wifi_slot.menu.FlashErase.all=All Flash Contents
+wifi_slot.menu.FlashErase.all.upload.erase_cmd=-ca 0x0 -cz "{build.flash_size_bytes}"
+wifi_slot.menu.UploadSpeed.115200=115200
+wifi_slot.menu.UploadSpeed.115200.upload.speed=115200
+wifi_slot.menu.UploadSpeed.9600=9600
+wifi_slot.menu.UploadSpeed.9600.upload.speed=9600
+wifi_slot.menu.UploadSpeed.57600=57600
+wifi_slot.menu.UploadSpeed.57600.upload.speed=57600
+wifi_slot.menu.UploadSpeed.230400.linux=230400
+wifi_slot.menu.UploadSpeed.230400.macosx=230400
+wifi_slot.menu.UploadSpeed.230400.upload.speed=230400
+wifi_slot.menu.UploadSpeed.256000.windows=256000
+wifi_slot.menu.UploadSpeed.256000.upload.speed=256000
+wifi_slot.menu.UploadSpeed.460800.linux=460800
+wifi_slot.menu.UploadSpeed.460800.macosx=460800
+wifi_slot.menu.UploadSpeed.460800.upload.speed=460800
+wifi_slot.menu.UploadSpeed.512000.windows=512000
+wifi_slot.menu.UploadSpeed.512000.upload.speed=512000
+wifi_slot.menu.UploadSpeed.921600=921600
+wifi_slot.menu.UploadSpeed.921600.upload.speed=921600
+
diff --git a/doc/boards.rst b/doc/boards.rst
index 8b49832a13..d83e032b4e 100644
--- a/doc/boards.rst
+++ b/doc/boards.rst
@@ -389,3 +389,8 @@ WiFiduino
 
 Product page: https://wifiduino.com/esp8266
 
+Amperka WiFi Slot
+-----------------
+
+Product page: http://wiki.amperka.ru/wifi-slot
+
diff --git a/package/package_esp8266com_index.template.json b/package/package_esp8266com_index.template.json
index 21d5a33b1f..e746e7960e 100644
--- a/package/package_esp8266com_index.template.json
+++ b/package/package_esp8266com_index.template.json
@@ -94,6 +94,9 @@
             },
             {
               "name": "WiFiduino"
+            },
+            {
+              "name": "Amperka WiFi Slot"
             }
           ],
           "toolsDependencies": [
diff --git a/tools/boards.txt.py b/tools/boards.txt.py
index 483f7b2052..f55fd6cbbf 100755
--- a/tools/boards.txt.py
+++ b/tools/boards.txt.py
@@ -728,6 +728,20 @@
         'serial': '921',
         'desc': [ 'Product page: https://wifiduino.com/esp8266' ],
     }),
+    ( 'wifi_slot', {
+        'name': 'Amperka WiFi Slot',
+        'opts': {
+            '.build.board': 'AMPERKA_WIFI_SLOT',
+            '.build.variant': 'wifi_slot',
+            },
+        'macro': [
+            'resetmethod_nodemcu',
+            'flashfreq_menu',
+            'flashmode_menu',
+            '1M', '2M',
+            ],
+        'desc': [ 'Product page: http://wiki.amperka.ru/wifi-slot' ],
+    }),
     ])
 
 ################################################################
diff --git a/variants/wifi_slot/analogRead.cpp b/variants/wifi_slot/analogRead.cpp
new file mode 100644
index 0000000000..f2c1f3c7a2
--- /dev/null
+++ b/variants/wifi_slot/analogRead.cpp
@@ -0,0 +1,50 @@
+#include "wiring_private.h"
+#include "pins_arduino.h"
+
+extern "C" int  __analogRead(uint8_t pin);
+
+extern "C" int analogRead(uint8_t pin) {
+
+  static uint8_t currentAin = 0;
+
+  delay(0);
+  if (pin >= ANALOG_INPUT_HARDWARE) {
+    return 0;
+  }
+  uint8_t ain = analog_pin_to_mux_channel[pin];
+  if (ain == (uint8_t)NOT_A_PIN) {
+    return 0;
+  } 
+  if (currentAin > ain) {
+    for (int i = 0; i < (8 - currentAin); ++i)
+    {
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+    }
+    currentAin = 0;
+  }
+  for (int i = currentAin; i < ain; ++i)
+  {
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+  }
+  currentAin = ain;
+  return __analogRead(ANALOG_INPUT_HARDWARE);
+}
+
+void initVariant() {
+  // we need to reset analog mux. When ANALOG_INPUT_SELECTOR_PIN is high
+  // on ~0.4 ms, mux channel is becoming 0.
+  // Mux channel is swithing on back \_ front. But there is no switching
+  // - rc reset is still high when ANALOG_INPUT_SELECTOR_PIN became low
+  uint16_t resetDelay = 777;
+  pinMode(ANALOG_INPUT_SELECTOR_PIN, OUTPUT);
+  digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+  delayMicroseconds(resetDelay);
+  digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+  delayMicroseconds(resetDelay);
+}
diff --git a/variants/wifi_slot/pins_arduino.h b/variants/wifi_slot/pins_arduino.h
new file mode 100644
index 0000000000..a3fbfaaa4e
--- /dev/null
+++ b/variants/wifi_slot/pins_arduino.h
@@ -0,0 +1,86 @@
+/*
+  pins_arduino.h - Pin definition functions for Arduino
+  Part of Arduino - http://www.arduino.cc/
+
+  Copyright (c) 2007 David A. Mellis
+  Modified for ESP8266 WIFIO board by Ivan Grokhotkov, 2015.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+
+  Changed : 24.11.2017 Vasily Basalaev
+            Definition for WiFi Slot
+            Amperka LLC
+            http://amperka.ru
+
+  $Id: wiring.h 249 2007-02-03 16:52:51Z mellis $
+*/
+
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#define PIN_WIRE_SDA (2)
+#define PIN_WIRE_SCL (0)
+
+static const uint8_t SDA = PIN_WIRE_SDA;
+static const uint8_t SCL = PIN_WIRE_SCL;
+
+#define PIN_A0 (3)
+#define PIN_A1 (1)
+#define PIN_A2 (16)
+#define PIN_A3 (13)
+#define PIN_A4 (5)
+#define PIN_A5 (14)
+#define PIN_A6 (4)
+#define PIN_A7 (12)
+
+// A0 will be assigned in "../generic/common.h"
+// static const uint8_t A0 = PIN_A0;
+static const uint8_t A1 = PIN_A1;
+static const uint8_t A2 = PIN_A2;
+static const uint8_t A3 = PIN_A3;
+static const uint8_t A4 = PIN_A4;
+static const uint8_t A5 = PIN_A5;
+static const uint8_t A6 = PIN_A6;
+static const uint8_t A7 = PIN_A7;
+
+#define LED_BUILTIN 2
+
+static const uint8_t ANALOG_INPUT_SELECTOR_PIN = 15;
+static const uint8_t ANALOG_INPUT_HARDWARE = 17;
+
+static const uint8_t analog_pin_to_mux_channel[] = {
+    (uint8_t)NOT_A_PIN   // 0
+  , 1                    // 1
+  , (uint8_t)NOT_A_PIN   // 2
+  , 0                    // 3
+  , 6                    // 4
+  , 4                    // 5
+  , (uint8_t)NOT_A_PIN   // 6
+  , (uint8_t)NOT_A_PIN   // 7
+  , (uint8_t)NOT_A_PIN   // 8
+  , (uint8_t)NOT_A_PIN   // 9
+  , (uint8_t)NOT_A_PIN   // 10
+  , (uint8_t)NOT_A_PIN   // 11
+  , 7                    // 12
+  , 3                    // 13
+  , 5                    // 14
+  , (uint8_t)NOT_A_PIN   // 15
+  , 2                    // 16
+};
+
+#include "../generic/common.h"
+
+#endif /* Pins_Arduino_h */