diff --git a/main/gatts_demo.c b/main/gatts_demo.c
index c21f9d4..99579e5 100644
--- a/main/gatts_demo.c
+++ b/main/gatts_demo.c
@@ -1009,7 +1009,7 @@ bool parse_rxbuffer_and_validation_data(cJSON **json_tmp)
     *json_tmp = cJSON_Parse(&bluetooth_rx_buffer[0]);
     if (*json_tmp == NULL)
     {
-        ESP_LOGE(GATTS_TAG, "ERROR json_tmp null");
+        ESP_LOGE(GATTS_TAG, "parse rxbuffer nil or redundant symbol ',' ");
         return false;
     }
     return true;