diff --git a/src/btstack_util.c b/src/btstack_util.c
index 3c7aaca22..c6a8d19fb 100644
--- a/src/btstack_util.c
+++ b/src/btstack_util.c
@@ -312,3 +312,14 @@ int sscanf_bd_addr(const char * addr_string, bd_addr_t addr){
     }
 	return result;
 }
+
+uint32_t btstack_atoi(const char *str){
+    uint32_t val = 0;
+    while (1){
+        char chr = *str;
+        if (!chr || chr < '0' || chr > '9')
+            return val;
+        val = (val * 10) + (chr - '0');
+        str++;
+    }
+}
\ No newline at end of file
diff --git a/src/btstack_util.h b/src/btstack_util.h
index a177aa02d..7ab067cc8 100644
--- a/src/btstack_util.h
+++ b/src/btstack_util.h
@@ -216,6 +216,14 @@ void uuid_add_bluetooth_prefix(uint8_t * uuid128, uint32_t short_uuid);
  */
 int  uuid_has_bluetooth_prefix(uint8_t * uuid128);
 
+/**
+ * @brief Parse unsigned number 
+ * @param str to parse
+ * @return value
+ */
+uint32_t btstack_atoi(const char *str);
+
+
 #if defined __cplusplus
 }
 #endif