There were some confusion on what’s the minimum things to plug in to properly flash BLHeli onto the the ESC. I know I had the same questions when I started out and when you run into a problem, there are too many variables to contend with.
An overhead view of how I have mine set up. You don’t need anything more than this to properly flash the ESC.
And for completeness, here is the order of how I hook things up.
- First, I connect the ESC to the USB Toolstick.
- Next, I connect the USB Toolstick to the computer.
- Finally I connect the battery to the ESC to power it up.
I then open up the BLHeliSuite program that user 4712 from HeliFreak wrote.
I click on the “Flash BlHeli Hex File” button. Then select the proper firmware I want to flash over and hit the “OK” button to flash the new firmware onto the ESC. (You’ll get prompted with a couple of dialog boxes warning that you’re about to overwrite the original firmware on the ESC. I just answer ok to dismiss them and continue on.)
Let me know if that helps you or if I need to clarify any steps.