diff --git a/Makefile b/Makefile
index 4a10ae9..1193e89 100644
--- a/Makefile
+++ b/Makefile
@@ -57,7 +57,7 @@ XTENSA_TOOLS_ROOT ?= $(abspath ../esp-open-sdk/xtensa-lx106-elf/bin)/
 # Firmware version 
 # WARNING: if you change this expect to make code adjustments elsewhere, don't expect
 # that esp-link will magically work with a different version of the SDK!!!
-SDK_VERS ?= esp_iot_sdk_v2.0.0.p1
+SDK_VERS ?= esp_iot_sdk_v2.1.0
 
 # Try to find the firmware manually extracted, e.g. after downloading from Espressif's BBS,
 # http://bbs.espressif.com/viewforum.php?f=46
diff --git a/cmd/handlers.c b/cmd/handlers.c
index abeac8d..8605f68 100644
--- a/cmd/handlers.c
+++ b/cmd/handlers.c
@@ -319,7 +319,7 @@ static void ICACHE_FLASH_ATTR cmdWifiSelectSSID(CmdPacket *cmd) {
   cmdPopArg(&req, pass, len);
   pass[len] = 0;
 
-  DBG("SelectSSID(%d,%s)", ix, pass);
+  DBG("SelectSSID(%s,%s)", ssid, pass);
   connectToNetwork(ssid, pass);
 }
 
diff --git a/include/espmissingincludes.h b/include/espmissingincludes.h
index b961ce0..763ff50 100644
--- a/include/espmissingincludes.h
+++ b/include/espmissingincludes.h
@@ -17,8 +17,8 @@ char *wifi_station_get_hostname(void);
 
 int atoi(const char *nptr);
 
-void ets_install_putc1(void *routine); // necessary for #define os_xxx -> ets_xxx
-void ets_isr_attach(int intr, void *handler, void *arg);
+//void ets_install_putc1(void *routine); // necessary for #define os_xxx -> ets_xxx
+//void ets_isr_attach(int intr, void *handler, void *arg);
 void ets_isr_mask(unsigned intr);
 void ets_isr_unmask(unsigned intr);
 
@@ -30,12 +30,12 @@ int ets_sprintf(char *str, const char *format, ...)  __attribute__ ((format (pri
 int ets_str2macaddr(void *, void *);
 int ets_strcmp(const char *s1, const char *s2);
 char *ets_strcpy(char *dest, const char *src);
-size_t ets_strlen(const char *s);
-int ets_strncmp(const char *s1, const char *s2, int len);
+//size_t ets_strlen(const char *s);
+//int ets_strncmp(const char *s1, const char *s2, int len);
 char *ets_strncpy(char *dest, const char *src, size_t n);
 char *ets_strstr(const char *haystack, const char *needle);
 
-void ets_timer_arm_new(ETSTimer *a, int b, int c, int isMstimer);
+//void ets_timer_arm_new(ETSTimer *a, int b, int c, int isMstimer);
 void ets_timer_disarm(ETSTimer *a);
 void ets_timer_setfn(ETSTimer *t, ETSTimerFunc *fn, void *parg);
 
@@ -62,17 +62,17 @@ int os_printf_plus(const char *format, ...)  __attribute__((format(printf, 1, 2)
 
 // memory allocation functions are "different" due to memory debugging functionality
 // added in SDK 1.4.0
-void vPortFree(void *ptr, const char * file, int line);
-void *pvPortMalloc(size_t xWantedSize, const char * file, int line);
-void *pvPortZalloc(size_t, const char * file, int line);
+//void vPortFree(void *ptr, const char * file, int line);
+//void *pvPortMalloc(size_t xWantedSize, const char * file, int line);
+//void *pvPortZalloc(size_t, const char * file, int line);
 void *vPortMalloc(size_t xWantedSize);
 void pvPortFree(void *ptr);
 
-void uart_div_modify(int no, unsigned int freq);
+//void uart_div_modify(int no, unsigned int freq);
 uint32 system_get_time();
 int rand(void);
 void ets_bzero(void *s, size_t n);
-void ets_delay_us(int ms);
+//void ets_delay_us(int ms);
 
 // disappeared in SDK 1.1.0:
 #define os_timer_done ets_timer_done