diff --git a/components/bt/bluedroid/api/esp_bt_main.c b/components/bt/bluedroid/api/esp_bt_main.c
index 1b4f46c52d..8aff98e8b9 100644
--- a/components/bt/bluedroid/api/esp_bt_main.c
+++ b/components/bt/bluedroid/api/esp_bt_main.c
@@ -119,7 +119,7 @@ esp_err_t esp_bluedroid_init(void)
     future_t **future_p;
 
     if (esp_bt_controller_get_status() != ESP_BT_CONTROLLER_STATUS_ENABLED) {
-        LOG_ERROR("Conroller not initialised\n");
+        LOG_ERROR("Controller not initialised\n");
         return ESP_ERR_INVALID_STATE;
     }
 
diff --git a/components/esp32/sleep_modes.c b/components/esp32/sleep_modes.c
index f3bd071f3f..d460365905 100644
--- a/components/esp32/sleep_modes.c
+++ b/components/esp32/sleep_modes.c
@@ -81,7 +81,9 @@ static sleep_config_t s_config = {
     .wakeup_triggers = 0
 };
 
-bool s_light_sleep_wakeup = false;
+/* Internal variable used to track if light sleep wakeup sources are to be
+   expected when determining wakeup cause. */
+static bool s_light_sleep_wakeup = false;
 
 /* Updating RTC_MEMORY_CRC_REG register via set_rtc_memory_crc()
    is not thread-safe. */
diff --git a/components/esp_http_client/esp_http_client.c b/components/esp_http_client/esp_http_client.c
index c7a613bca9..2921c0d335 100644
--- a/components/esp_http_client/esp_http_client.c
+++ b/components/esp_http_client/esp_http_client.c
@@ -490,6 +490,14 @@ esp_http_client_handle_t esp_http_client_init(const esp_http_client_config_t *co
     if (config->cert_pem) {
         esp_transport_ssl_set_cert_data(ssl, config->cert_pem, strlen(config->cert_pem));
     }
+
+    if (config->client_cert_pem) {
+        esp_transport_ssl_set_client_cert_data(ssl, config->client_cert_pem, strlen(config->client_cert_pem));
+    }
+
+    if (config->client_key_pem) {
+        esp_transport_ssl_set_client_key_data(ssl, config->client_key_pem, strlen(config->client_key_pem));
+    }
 #endif
 
     if (_set_config(client, config) != ESP_OK) {
@@ -1100,6 +1108,7 @@ success:
 
 esp_err_t esp_http_client_open(esp_http_client_handle_t client, int write_len)
 {
+    client->post_len = write_len;
     esp_err_t err;
     if ((err = esp_http_client_connect(client)) != ESP_OK) {
         return err;
diff --git a/components/esp_http_client/include/esp_http_client.h b/components/esp_http_client/include/esp_http_client.h
index 4e940a6d10..77e9d85208 100644
--- a/components/esp_http_client/include/esp_http_client.h
+++ b/components/esp_http_client/include/esp_http_client.h
@@ -105,7 +105,9 @@ typedef struct {
     esp_http_client_auth_type_t auth_type;           /*!< Http authentication type, see `esp_http_client_auth_type_t` */
     const char                  *path;               /*!< HTTP Path, if not set, default is `/` */
     const char                  *query;              /*!< HTTP query */
-    const char                  *cert_pem;           /*!< SSL Certification, PEM format as string, if the client requires to verify server */
+    const char                  *cert_pem;           /*!< SSL server certification, PEM format as string, if the client requires to verify server */
+    const char                  *client_cert_pem;    /*!< SSL client certification, PEM format as string, if the server requires to verify client */
+    const char                  *client_key_pem;     /*!< SSL client key, PEM format as string, if the server requires to verify client */
     esp_http_client_method_t    method;                   /*!< HTTP Method */
     int                         timeout_ms;               /*!< Network timeout in milliseconds */
     bool                        disable_auto_redirect;    /*!< Disable HTTP automatic redirects */
diff --git a/components/esp_ringbuf/ringbuf.c b/components/esp_ringbuf/ringbuf.c
index 9a7117b74c..558b61c6d8 100644
--- a/components/esp_ringbuf/ringbuf.c
+++ b/components/esp_ringbuf/ringbuf.c
@@ -920,7 +920,7 @@ BaseType_t xRingbufferReceiveSplitFromISR(RingbufHandle_t xRingbuffer, void **pp
     configASSERT(ppvHeadItem != NULL && ppvTailItem != NULL);
 
     //Attempt to retrieve multiple items
-    void *pvTempHeadItem, *pvTempTailItem;
+    void *pvTempHeadItem = NULL, *pvTempTailItem = NULL;
     size_t xTempHeadSize, xTempTailSize;
     if (prvReceiveGenericFromISR(pxRingbuffer, &pvTempHeadItem, &pvTempTailItem, &xTempHeadSize, &xTempTailSize, 0) == pdTRUE) {
         //At least one item was received
diff --git a/components/soc/esp32/rtc_clk.c b/components/soc/esp32/rtc_clk.c
index 434691b307..3156517b92 100644
--- a/components/soc/esp32/rtc_clk.c
+++ b/components/soc/esp32/rtc_clk.c
@@ -503,7 +503,7 @@ rtc_cpu_freq_t rtc_clk_cpu_freq_get()
 {
     rtc_cpu_freq_config_t config;
     rtc_clk_cpu_freq_get_config(&config);
-    rtc_cpu_freq_t freq;
+    rtc_cpu_freq_t freq = RTC_CPU_FREQ_XTAL;
     rtc_clk_cpu_freq_from_mhz_internal(config.freq_mhz, &freq);
     return freq;
 }
diff --git a/components/tcp_transport/transport_ssl.c b/components/tcp_transport/transport_ssl.c
index 436f8a9436..59ff64de5d 100644
--- a/components/tcp_transport/transport_ssl.c
+++ b/components/tcp_transport/transport_ssl.c
@@ -130,6 +130,9 @@ static int ssl_read(esp_transport_handle_t t, char *buffer, int len, int timeout
     if (ret < 0) {
         ESP_LOGE(TAG, "esp_tls_conn_read error, errno=%s", strerror(errno));
     }
+    if (ret == 0) {
+        ret = -1;
+    }
     return ret;
 }