1、Download the Flash Download Tools and unzip
![](https://www.bitfunx.com/wp-content/uploads/2022/04/图片1-1.png)
2、Download the Blueretro firmware and unzip
![](https://www.bitfunx.com/wp-content/uploads/2022/04/图片2-1.png)
3、Execute flash_download_tool_3.9.2.exe
![](https://www.bitfunx.com/wp-content/uploads/2022/04/图片3-1.png)
4、Select chip mode ESP32 and click OK
![](https://www.bitfunx.com/wp-content/uploads/2022/04/图片4-1.png)
5、Select and check the 3 binary file in the first 3 field and match the option as in screenshot.
![](https://www.bitfunx.com/wp-content/uploads/2022/04/图片5-1.png)
6、Connect Blueretro to computer using micro usb cable,Select proper COM port for your machine.then press START
7、Wait for status to change to FINSH.
![](https://www.bitfunx.com/wp-content/uploads/2022/04/图片6-1.png)