# I have erased complete memory of BW16 using "image tool" and when uploading a basic blink code to BW16 then LED does not blink

**URL:** <https://forum.amebaiot.com/t/i-have-erased-complete-memory-of-bw16-using-image-tool-and-when-uploading-a-basic-blink-code-to-bw16-then-led-does-not-blink/1319>\
**Category:** Peripherals\
**Tags:** evb-bw16, rtl872xd\
**Created:** [June 25, 2022, 4:46pm UTC](https://forum.amebaiot.com/t/i-have-erased-complete-memory-of-bw16-using-image-tool-and-when-uploading-a-basic-blink-code-to-bw16-then-led-does-not-blink/1319 "2022-06-25T16:46:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Preetpal](https://avatars.discourse-cdn.com/v4/letter/p/34f0e0/32.png) [@Preetpal](https://forum.amebaiot.com/u/Preetpal)\
**Post date:** [June 25, 2022, 4:46pm UTC](https://forum.amebaiot.com/t/i-have-erased-complete-memory-of-bw16-using-image-tool-and-when-uploading-a-basic-blink-code-to-bw16-then-led-does-not-blink/1319/1 "2022-06-25T16:46:23Z")

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I have erased complete memory of BW16 using “image tool” and when uploading a basic blink code to BW16 then LED does not blink.

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**Author:** ![xidameng](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/xidameng/32/18_2.png) [@xidameng](https://forum.amebaiot.com/u/xidameng)\
**Post date:** [June 28, 2022, 10:31am UTC](https://forum.amebaiot.com/t/i-have-erased-complete-memory-of-bw16-using-image-tool-and-when-uploading-a-basic-blink-code-to-bw16-then-led-does-not-blink/1319/2 "2022-06-28T10:31:20Z")

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How much have you erase?

You need to erase at least 2048KB using the `image_tool` in order to completely wipe out the old B&T firmware and upload your own sketch like the blink