title_body: How to connect ESC to serial? I am looking for a way to access to configuration of Blheli-S firmware running on a Diatone Mamba F30Mini:
  
  It seems possible using :
  
  blheli-configurator
  BLHeliSuite
  
  There is explanation on different site about FC Passthrough. This seems to use connection to a Flight Controller.
  As I am planning to use an Arduino nano to connect to the ESC, I am wondering how to make the connection.
  Is it possible to connect more or less to connect the ESC to a PC ? or connecting through the arduino  ?
upvoted_answer: Thanks to informations given by @ifconfig, using BLHeliSuite connecting :
  
  GND to Arduino GND
  ESC1 to Arduino D11
  
  It allow to upload to Arduino the &quot;Arduino Bootloader&quot;
  
  Then selecting &quot;ATMEL BLHeli Bootloader (USB/Com)&quot;, and go to &quot;ESC Setup&quot; tab
  
  Finally quite straight-forward, with a tool that may be more user-friendly.