diff --git a/ESP-IDF_Robot/build/.ninja_lock b/ESP-IDF_Robot/build/.ninja_lock
new file mode 100644
index 000000000..e69de29bb
diff --git a/ESP-IDF_Robot/build/CMakeFiles/git-data/head-ref b/ESP-IDF_Robot/build/CMakeFiles/git-data/head-ref
index 95860d1c2..330a2b090 100644
--- a/ESP-IDF_Robot/build/CMakeFiles/git-data/head-ref
+++ b/ESP-IDF_Robot/build/CMakeFiles/git-data/head-ref
@@ -1 +1 @@
-8806219c7d8c73b0532c7afd27e9c0bd1efb9047
+efdea51dac034fe75f225e806685983fe9b61160
diff --git a/ESP-IDF_Robot/main/espnow_config.h b/ESP-IDF_Robot/main/espnow_config.h
index 21488ef56..fa30afe11 100644
--- a/ESP-IDF_Robot/main/espnow_config.h
+++ b/ESP-IDF_Robot/main/espnow_config.h
@@ -1,4 +1,54 @@
 #ifndef ESPNOW_CONFIG_H
 #define ESPNOW_CONFIG_H
 
+/* ESPNOW can work in both station and softap mode. It is configured in menuconfig. */
+#if CONFIG_ESPNOW_WIFI_MODE_STATION
+#define ESPNOW_WIFI_MODE WIFI_MODE_STA
+#define ESPNOW_WIFI_IF   ESP_IF_WIFI_STA
+#else
+#define ESPNOW_WIFI_MODE WIFI_MODE_AP
+#define ESPNOW_WIFI_IF   ESP_IF_WIFI_AP
+#endif
+
+#define ESPNOW_QUEUE_SIZE           6
+
+#define IS_BROADCAST_ADDR(addr) (memcmp(addr, s_example_broadcast_mac, ESP_NOW_ETH_ALEN) == 0)
+
+
+typedef enum {
+    EXAMPLE_ESPNOW_SEND_CB,
+    EXAMPLE_ESPNOW_RECV_CB,
+} espnow_event_id_t;
+
+typedef struct {
+    uint8_t mac_addr[ESP_NOW_ETH_ALEN];
+    esp_now_send_status_t status;
+} espnow_event_send_cb_t;
+
+typedef struct {
+    uint8_t mac_addr[ESP_NOW_ETH_ALEN];
+    uint8_t *data;
+    int data_len;
+} espnow_event_recv_cb_t;
+
+typedef union {
+    espnow_event_send_cb_t send_cb;
+    espnow_event_recv_cb_t recv_cb;
+} espnow_event_info_t;
+typedef union {
+    espnow_event_send_cb_t send_cb;
+    espnow_event_recv_cb_t recv_cb;
+} espnow_event_info_t;
+/* When ESPNOW sending or receiving callback function is called, post event to ESPNOW task. */
+typedef struct {
+    espnow_event_id_t id;
+    espnow_event_info_t info;
+} espnow_event_t;
+
+enum {
+    EXAMPLE_ESPNOW_DATA_BROADCAST,
+    EXAMPLE_ESPNOW_DATA_UNICAST,
+    EXAMPLE_ESPNOW_DATA_MAX,
+};
+
 #endif
\ No newline at end of file