diff --git a/include/owb_rmt.h b/include/owb_rmt.h
index b9becf8..82ca165 100644
--- a/include/owb_rmt.h
+++ b/include/owb_rmt.h
@@ -39,6 +39,22 @@
 #include "freertos/queue.h"
 #include "freertos/ringbuf.h"
 #include "driver/rmt.h"
+#include "soc/soc_caps.h"
+
+#ifdef SOC_RMT_SUPPORT_REF_TICK
+#define RMT_BASECLK_SRC RMT_BASECLK_REF
+#define RMT_CLK_DIV 1
+
+#elif SOC_RMT_SUPPORT_XTAL
+#define RMT_BASECLK_SRC RMT_BASECLK_XTAL
+#define RMT_CLK_DIV 40
+
+#else
+#define RMT_BASECLK_SRC RMT_BASECLK_APB
+#define RMT_CLK_DIV 80
+
+#endif
+
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/owb_rmt.c b/owb_rmt.c
index 1e22153..cfe3e16 100644
--- a/owb_rmt.c
+++ b/owb_rmt.c
@@ -370,13 +370,14 @@ static owb_status _init(owb_rmt_driver_info *info, gpio_num_t gpio_num,
 #ifdef OW_DEBUG
     ESP_LOGI(TAG, "RMT TX channel: %d", info->tx_channel);
     ESP_LOGI(TAG, "RMT RX channel: %d", info->rx_channel);
+    ESP_LOGI(TAG, "RMT CLK_DIV: %d, BASECLK_SRC: %d", RMT_CLK_DIV, RMT_BASECLK_SRC);
 #endif
 
     rmt_config_t rmt_tx = {0};
     rmt_tx.channel = info->tx_channel;
     rmt_tx.gpio_num = gpio_num;
     rmt_tx.mem_block_num = 1;
-    rmt_tx.clk_div = 80;
+    rmt_tx.clk_div = RMT_CLK_DIV;
     rmt_tx.tx_config.loop_en = false;
     rmt_tx.tx_config.carrier_en = false;
     rmt_tx.tx_config.idle_level = 1;
@@ -384,13 +385,13 @@ static owb_status _init(owb_rmt_driver_info *info, gpio_num_t gpio_num,
     rmt_tx.rmt_mode = RMT_MODE_TX;
     if (rmt_config(&rmt_tx) == ESP_OK)
     {
-        rmt_set_source_clk(info->tx_channel, RMT_BASECLK_APB);  // only APB is supported by IDF 4.2
+        rmt_set_source_clk(info->tx_channel, RMT_BASECLK_SRC);
         if (rmt_driver_install(rmt_tx.channel, 0, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_SHARED) == ESP_OK)
         {
             rmt_config_t rmt_rx = {0};
             rmt_rx.channel = info->rx_channel;
             rmt_rx.gpio_num = gpio_num;
-            rmt_rx.clk_div = 80;
+            rmt_rx.clk_div = RMT_CLK_DIV;
             rmt_rx.mem_block_num = 1;
             rmt_rx.rmt_mode = RMT_MODE_RX;
             rmt_rx.rx_config.filter_en = true;
@@ -398,7 +399,7 @@ static owb_status _init(owb_rmt_driver_info *info, gpio_num_t gpio_num,
             rmt_rx.rx_config.idle_threshold = OW_DURATION_RX_IDLE;
             if (rmt_config(&rmt_rx) == ESP_OK)
             {
-                rmt_set_source_clk(info->rx_channel, RMT_BASECLK_APB);  // only APB is supported by IDF 4.2
+                rmt_set_source_clk(info->rx_channel, RMT_BASECLK_SRC);
                 if (rmt_driver_install(rmt_rx.channel, 512, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_SHARED) == ESP_OK)
                 {
                     rmt_get_ringbuf_handle(info->rx_channel, &info->rb);