diff --git a/app/include/user_config.h b/app/include/user_config.h
index 27efbc9a..be3332ef 100644
--- a/app/include/user_config.h
+++ b/app/include/user_config.h
@@ -1,8 +1,6 @@
 #ifndef __USER_CONFIG_H__
 #define __USER_CONFIG_H__
 
-// #define DEVKIT_VERSION_0_9 1 	// define this only if you use NodeMCU devkit v0.9
-
 // #define FLASH_512K
 // #define FLASH_1M
 // #define FLASH_2M
@@ -87,18 +85,6 @@ extern void luaL_assertfail(const char *file, int line, const char *message);
 #define LUA_PROCESS_LINE_SIG 2
 #define LUA_OPTIMIZE_DEBUG      2
 
-#ifdef DEVKIT_VERSION_0_9
-#define KEYLED_INTERVAL	80
-
-#define KEY_SHORT_MS	200
-#define KEY_LONG_MS		3000
-#define KEY_SHORT_COUNT (KEY_SHORT_MS / READLINE_INTERVAL)
-#define KEY_LONG_COUNT (KEY_LONG_MS / READLINE_INTERVAL)
-
-#define LED_HIGH_COUNT_DEFAULT 10
-#define LED_LOW_COUNT_DEFAULT 0
-#endif
-
 #define ENDUSER_SETUP_AP_SSID "SetupGadget"
 
 /*
diff --git a/app/modules/node.c b/app/modules/node.c
index 18a770e6..1d1d8f2f 100644
--- a/app/modules/node.c
+++ b/app/modules/node.c
@@ -146,160 +146,6 @@ static int node_heap( lua_State* L )
   return 1;
 }
 
-#ifdef DEVKIT_VERSION_0_9
-static int led_high_count = LED_HIGH_COUNT_DEFAULT;
-static int led_low_count = LED_LOW_COUNT_DEFAULT;
-static int led_count = 0;
-static int key_press_count = 0;
-static bool key_short_pressed = false;
-static bool key_long_pressed = false;
-static os_timer_t keyled_timer;
-static int long_key_ref = LUA_NOREF;
-static int short_key_ref = LUA_NOREF;
-
-static void default_long_press(void *arg) {
-  if (led_high_count == 12 && led_low_count == 12) {
-    led_low_count = led_high_count = 6;
-  } else {
-    led_low_count = led_high_count = 12;
-  }
-  // led_high_count = 1000 / READLINE_INTERVAL;
-  // led_low_count = 1000 / READLINE_INTERVAL;
-  // NODE_DBG("default_long_press is called. hc: %d, lc: %d\n", led_high_count, led_low_count);
-}
-
-static void default_short_press(void *arg) {
-  system_restart();
-}
-
-static void key_long_press(void *arg) {
-  lua_State *L = lua_getstate();
-  NODE_DBG("key_long_press is called.\n");
-  if (long_key_ref == LUA_NOREF) {
-    default_long_press(arg);
-    return;
-  }
-  lua_rawgeti(L, LUA_REGISTRYINDEX, long_key_ref);
-  lua_call(L, 0, 0);
-}
-
-static void key_short_press(void *arg) {
-  lua_State *L = lua_getstate();
-  NODE_DBG("key_short_press is called.\n");
-  if (short_key_ref == LUA_NOREF) {
-    default_short_press(arg);
-    return;
-  }
-  lua_rawgeti(L, LUA_REGISTRYINDEX, short_key_ref);
-  lua_call(L, 0, 0);
-}
-
-static void update_key_led (void *p)
-{
-  (void)p;
-  uint8_t temp = 1, level = 1;
-  led_count++;
-  if(led_count>led_low_count+led_high_count){
-    led_count = 0;    // reset led_count, the level still high
-  } else if(led_count>led_low_count && led_count <=led_high_count+led_low_count){
-    level = 1;    // output high level
-  } else if(led_count<=led_low_count){
-    level = 0;    // output low level
-  }
-  temp = platform_key_led(level);
-  if(temp == 0){      // key is pressed
-    key_press_count++;
-    if(key_press_count>=KEY_LONG_COUNT){
-      // key_long_press(NULL);
-      key_long_pressed = true;
-      key_short_pressed = false;
-      // key_press_count = 0;
-    } else if(key_press_count>=KEY_SHORT_COUNT){    // < KEY_LONG_COUNT
-      // key_short_press(NULL);
-      key_short_pressed = true;
-    }
-  }else{  // key is released
-    key_press_count = 0;
-    if(key_long_pressed){
-      key_long_press(NULL);
-      key_long_pressed = false;
-    }
-    if(key_short_pressed){
-      key_short_press(NULL);
-      key_short_pressed = false;
-    }
-  }
-}
-
-static void prime_keyled_timer (void)
-{
-  os_timer_disarm (&keyled_timer);
-  os_timer_setfn (&keyled_timer, update_key_led, 0);
-  os_timer_arm (&keyled_timer, KEYLED_INTERVAL, 1);
-}
-
-// Lua: led(low, high)
-static int node_led( lua_State* L )
-{
-  int low, high;
-  if ( lua_isnumber(L, 1) )
-  {
-    low = lua_tointeger(L, 1);
-    if ( low < 0 ) {
-      return luaL_error( L, "wrong arg type" );
-    }
-  } else {
-    low = LED_LOW_COUNT_DEFAULT; // default to LED_LOW_COUNT_DEFAULT
-  }
-  if ( lua_isnumber(L, 2) )
-  {
-    high = lua_tointeger(L, 2);
-    if ( high < 0 ) {
-      return luaL_error( L, "wrong arg type" );
-    }
-  } else {
-    high = LED_HIGH_COUNT_DEFAULT; // default to LED_HIGH_COUNT_DEFAULT
-  }
-  led_high_count = (uint32_t)high / READLINE_INTERVAL;
-  led_low_count = (uint32_t)low / READLINE_INTERVAL;
-  prime_keyled_timer();
-  return 0;
-}
-
-// Lua: key(type, function)
-static int node_key( lua_State* L )
-{
-  int *ref = NULL;
-  size_t sl;
-
-  const char *str = luaL_checklstring( L, 1, &sl );
-  if (str == NULL)
-    return luaL_error( L, "wrong arg type" );
-
-  if (sl == 5 && c_strcmp(str, "short") == 0) {
-    ref = &short_key_ref;
-  } else if (sl == 4 && c_strcmp(str, "long") == 0) {
-    ref = &long_key_ref;
-  } else {
-    ref = &short_key_ref;
-  }
-  // luaL_checkanyfunction(L, 2);
-  if (lua_type(L, 2) == LUA_TFUNCTION || lua_type(L, 2) == LUA_TLIGHTFUNCTION) {
-    lua_pushvalue(L, 2);  // copy argument (func) to the top of stack
-    if (*ref != LUA_NOREF)
-      luaL_unref(L, LUA_REGISTRYINDEX, *ref);
-    *ref = luaL_ref(L, LUA_REGISTRYINDEX);
-  } else {    // unref the key press function
-    if (*ref != LUA_NOREF)
-      luaL_unref(L, LUA_REGISTRYINDEX, *ref);
-    *ref = LUA_NOREF;
-  }
-
-  prime_keyled_timer();
-  return 0;
-}
-#endif
-
 extern lua_Load gLoad;
 extern bool user_process_input(bool force);
 // Lua: input("string")
@@ -643,10 +489,6 @@ static const LUA_REG_TYPE node_map[] =
   { LSTRKEY( "flashid" ), LFUNCVAL( node_flashid ) },
   { LSTRKEY( "flashsize" ), LFUNCVAL( node_flashsize) },
   { LSTRKEY( "heap" ), LFUNCVAL( node_heap ) },
-#ifdef DEVKIT_VERSION_0_9
-  { LSTRKEY( "key" ), LFUNCVAL( node_key ) },
-  { LSTRKEY( "led" ), LFUNCVAL( node_led ) },
-#endif
   { LSTRKEY( "input" ), LFUNCVAL( node_input ) },
   { LSTRKEY( "output" ), LFUNCVAL( node_output ) },
 // Moved to adc module, use adc.readvdd33()
diff --git a/docs/en/modules/node.md b/docs/en/modules/node.md
index 7989d708..ef033944 100644
--- a/docs/en/modules/node.md
+++ b/docs/en/modules/node.md
@@ -200,54 +200,6 @@ sk:on("receive", function(conn, payload) node.input(payload) end)
 #### See also
 [`node.output()`](#nodeoutput)
 
-## node.key() --deprecated
-
-Defines action to take on button press (on the old devkit 0.9), button connected to GPIO 16.
-
-This function is only available if the firmware was compiled with DEVKIT_VERSION_0_9 defined.
-
-#### Syntax
-`node.key(type, function())`
-
-#### Parameters
-  - `type`: type is either string "long" or "short". long: press the key for 3 seconds, short: press shortly(less than 3 seconds)
-  - `function`: user defined function which is called when key is pressed. If nil, remove the user defined function. Default function: long: change LED blinking rate,  short: reset chip
-
-#### Returns
-`nil`
-
-#### Example
-```lua
-node.key("long", function() print('hello world') end)
-```
-#### See also
-[`node.led()`](#nodeled-deprecated)
-
-## node.led() --deprecated
-
-Sets the on/off time for the LED (on the old devkit 0.9), with the LED connected to GPIO16, multiplexed with [`node.key()`](#nodekey-deprecated).
-
-This function is only available if the firmware was compiled with DEVKIT_VERSION_0_9 defined.
-
-#### Syntax
-`node.led(low, high)`
-
-#### Parameters
-  - `low` LED off time, LED keeps on when low=0. Unit: milliseconds, time resolution: 80~100ms
-  - `high` LED on time. Unit: milliseconds, time resolution: 80~100ms
-
-#### Returns
-`nil`
-
-#### Example
-```lua
--- turn led on forever.
-node.led(0)
-```
-
-#### See also
-[`node.key()`](#nodekey-deprecated)
-
 ## node.output()
 
 Redirects the Lua interpreter output to a callback function. Optionally also prints it to the serial console.