How-To flash A-H BLHeli_S firmware

This is a quick how-to flash an A-H BLHeliS firmware, when your ESC support it, but you can´t see the firmware in the BLHeli Suite software.

Example: You have a Racerstar MS ESC, which has a BB2 MCU and should be able to use the A-H type firmware, but you only can choose an A-L firmware.

Open BLHeli Suite, go to “Options” and choose “Expert Mode”.

blheli_flash_unsupported_esc

Then connect your ESC and proceed to flashing BLHeliS firmware. Click on “Ignore inappropriate MCU” and then you will be able to choose the A-H firmware.

blheli_flash_unsupported_esc_ignore_mcu

Please note that your ESC should in theory support that firmware, so double check before flashing or you can damage it.

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5 Comments

  1. Montis

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    1

    Nice how-to. But please have in mind that there are Racerstar ECS’s with BB1 MCU ( Racerstar MS Lite). They should be flashed with A-L firmware.

    Reply

    • Sergey

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      Hey Montis, thanks for mentioning that. Just checked it and notice that there is Lite version of the Racerstar MS. Best, Sergey

      Reply

  2. Nick

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    Thanks! But do you know the improvements?

    Greets Nick

    Reply

    • Sergey

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      2

      Hey Nick, not sure if there is any real noticeable improvement…

      Reply