diff --git a/components/esp32/esp_adapter.c b/components/esp32/esp_adapter.c
index c300fa09c..ce1d1846a 100644
--- a/components/esp32/esp_adapter.c
+++ b/components/esp32/esp_adapter.c
@@ -588,6 +588,7 @@ wifi_osi_funcs_t g_wifi_osi_funcs = {
     ._get_time = get_time_wrapper,
     ._random = os_random,
     ._log_write = esp_log_write,
+    ._log_writev = esp_log_writev,
     ._log_timestamp = esp_log_timestamp,
     ._malloc_internal =  malloc_internal_wrapper,
     ._realloc_internal = realloc_internal_wrapper,
diff --git a/components/esp32/include/esp_wifi_os_adapter.h b/components/esp32/include/esp_wifi_os_adapter.h
index 89778661a..666c44d92 100644
--- a/components/esp32/include/esp_wifi_os_adapter.h
+++ b/components/esp32/include/esp_wifi_os_adapter.h
@@ -105,6 +105,7 @@ typedef struct {
     int32_t (* _get_time)(void *t);
     unsigned long (* _random)(void);
     void (* _log_write)(uint32_t level, const char* tag, const char* format, ...);
+    void (* _log_writev)(uint32_t level, const char* tag, const char* format, va_list args);
     uint32_t (* _log_timestamp)(void);
     void * (* _malloc_internal)(size_t size);
     void * (* _realloc_internal)(void *ptr, size_t size);
diff --git a/components/esp32/include/esp_wifi_types.h b/components/esp32/include/esp_wifi_types.h
index 3f6eccde0..2f50da3c5 100644
--- a/components/esp32/include/esp_wifi_types.h
+++ b/components/esp32/include/esp_wifi_types.h
@@ -214,7 +214,7 @@ typedef struct {
     uint8_t channel;            /**< Channel of ESP32 soft-AP */
     wifi_auth_mode_t authmode;  /**< Auth mode of ESP32 soft-AP. Do not support AUTH_WEP in soft-AP mode */
     uint8_t ssid_hidden;        /**< Broadcast SSID or not, default 0, broadcast the SSID */
-    uint8_t max_connection;     /**< Max number of stations allowed to connect in, default 4, max 4 */
+    uint8_t max_connection;     /**< Max number of stations allowed to connect in, default 4, max 10 */
     uint16_t beacon_interval;   /**< Beacon interval, 100 ~ 60000 ms, default 100 ms */
 } wifi_ap_config_t;
 
diff --git a/components/esp32/lib b/components/esp32/lib
index 3875c4151..b7749ef26 160000
--- a/components/esp32/lib
+++ b/components/esp32/lib
@@ -1 +1 @@
-Subproject commit 3875c415108573d7067efb64c51b1ceb39f764f6
+Subproject commit b7749ef26a3d3179a2f5f4b2fa9c53025c450b3b
diff --git a/components/log/include/esp_log.h b/components/log/include/esp_log.h
index e57aabbdd..8616c5610 100644
--- a/components/log/include/esp_log.h
+++ b/components/log/include/esp_log.h
@@ -108,6 +108,15 @@ void esp_log_write(esp_log_level_t level, const char* tag, const char* format, .
 
 /** @cond */
 
+/**
+ * @brief Write message into the log, va_list variant
+ * @see esp_log_write()
+ *
+ * This function is provided to ease integration toward other logging framework,
+ * so that esp_log can be used as a log sink.
+ */
+void esp_log_writev(esp_log_level_t level, const char* tag, const char* format, va_list args);
+
 #include "esp_log_internal.h"
 
 #ifndef LOG_LOCAL_LEVEL
diff --git a/components/log/log.c b/components/log/log.c
index d0304a308..bdc558d07 100644
--- a/components/log/log.c
+++ b/components/log/log.c
@@ -184,9 +184,10 @@ void clear_log_level_list()
 #endif
 }
 
-void IRAM_ATTR esp_log_write(esp_log_level_t level,
+void IRAM_ATTR esp_log_writev(esp_log_level_t level,
         const char* tag,
-        const char* format, ...)
+        const char* format,
+        va_list args)
 {
     if (!s_log_mutex) {
         s_log_mutex = xSemaphoreCreateMutex();
@@ -210,9 +211,16 @@ void IRAM_ATTR esp_log_write(esp_log_level_t level,
         return;
     }
 
+    (*s_log_print_func)(format, args);
+}
+
+void esp_log_write(esp_log_level_t level,
+                   const char *tag,
+                   const char *format, ...)
+{
     va_list list;
     va_start(list, format);
-    (*s_log_print_func)(format, list);
+    esp_log_writev(level, tag, format, list);
     va_end(list);
 }