diff --git a/read_values.py b/read_values.py
index 364d7bf..bff42f4 100644
--- a/read_values.py
+++ b/read_values.py
@@ -43,7 +43,11 @@ if __name__ == '__main__':
 
                 previous_module = ""
                 for module in modules: #for each module inside the list of modules
+                    if module[0] not in module_index: #this if break is added to avoid the script from breaking at the start (which happens when serial is not yet receiving all values, but only fragments)
+                        # print("break")
+                        break # break and start the for loop again
                     function_index[module[0]](previous_module, module) #use function_index to run functions for each module
+
                     previous_module = module_index[module[0]] #use module_index to replace abbr. with full name
                     if module == modules[-1]: #if module is the last module in list of modules
                         final_module = module_index[module[0]] #use name of the last module to define final_module