diff --git a/components/esp8266/include/esp_phy_init.h b/components/esp8266/include/esp_phy_init.h
index fb61519d..b2b770a6 100644
--- a/components/esp8266/include/esp_phy_init.h
+++ b/components/esp8266/include/esp_phy_init.h
@@ -165,6 +165,11 @@ esp_err_t esp_phy_rf_deinit(phy_rf_module_t module);
  */
 void esp_phy_load_cal_and_init(phy_rf_module_t module);
 
+/**
+ * @brief Initializing system hardware clock.
+ */
+void esp_phy_init_clk(void);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/components/esp8266/source/phy_init.c b/components/esp8266/source/phy_init.c
index b67ff7bb..24247c9f 100644
--- a/components/esp8266/source/phy_init.c
+++ b/components/esp8266/source/phy_init.c
@@ -394,3 +394,31 @@ int phy_printf(const char *fmt, ...)
 {
     return 0;
 }
+
+void esp_phy_init_clk(void)
+{
+    uint8_t buf[128];
+    const esp_phy_init_data_t *init_data;
+#ifdef CONFIG_CONSOLE_UART_BAUDRATE
+    const uint32_t uart_baudrate = CONFIG_CONSOLE_UART_BAUDRATE;
+#else
+    const uint32_t uart_baudrate = 74880; // ROM default baudrate
+#endif
+
+    init_data = esp_phy_get_init_data();
+    if (init_data == NULL) {
+        ESP_LOGE(TAG, "failed to obtain PHY init data");
+        abort();
+    }
+    memcpy(buf, init_data->params, 128);
+
+    uart_tx_wait_idle(0);
+    uart_div_modify(0, UART_CLK_FREQ / uart_baudrate);
+
+    uart_tx_wait_idle(1);
+    uart_div_modify(1, UART_CLK_FREQ / uart_baudrate);
+
+    rtc_init_clk(buf);
+
+    esp_phy_release_init_data(init_data);
+}
diff --git a/components/esp8266/source/startup.c b/components/esp8266/source/startup.c
index 14bdae5f..c83f73e0 100644
--- a/components/esp8266/source/startup.c
+++ b/components/esp8266/source/startup.c
@@ -89,6 +89,8 @@ static void user_init_entry(void *param)
 
     esp_wifi_set_rx_pbuf_mem_type(WIFI_RX_PBUF_DRAM);
 
+    esp_phy_init_clk();
+
 #if CONFIG_RESET_REASON
     esp_reset_reason_init();
 #endif