# Raw bitstream (unframed) async serial protocol analyzer

**URL:** <https://discuss.saleae.com/t/raw-bitstream-unframed-async-serial-protocol-analyzer/1234>\
**Category:** Support\
**Created:** [October 20, 2021, 3:01am UTC](https://discuss.saleae.com/t/raw-bitstream-unframed-async-serial-protocol-analyzer/1234 "2021-10-20T03:01:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sean.clark](https://avatars.discourse-cdn.com/v4/letter/s/c4cdca/32.png) [@sean.clark](https://discuss.saleae.com/u/sean.clark)\
**Post date:** [October 20, 2021, 3:01am UTC](https://discuss.saleae.com/t/raw-bitstream-unframed-async-serial-protocol-analyzer/1234/1 "2021-10-20T03:01:42Z")

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Hi,

I have a long (\>1500kb) raw bitstream that I’d like to decode to HEX. I’m basically looking for an Async Serial analyzer that supports ZERO stop/start bits. I see that [https://support.saleae.com/protocol-analyzers/analyzer-user-guides/using-async-serial](https://support.saleae.com/protocol-analyzers/analyzer-user-guides/using-async-serial) broadly recognises that such alternatives might be useful but states that this is not supported.

I believe an HLA would be no use to me, since by that point the data will have been decoded with framing errors before presentation to the HLA for processing.

Please advise.

Thanks,

Sean.

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<div class="post-metadata">

**Author:** ![sean.clark](https://avatars.discourse-cdn.com/v4/letter/s/c4cdca/32.png) [@sean.clark](https://discuss.saleae.com/u/sean.clark)\
**Post date:** [October 20, 2021, 3:04am UTC](https://discuss.saleae.com/t/raw-bitstream-unframed-async-serial-protocol-analyzer/1234/2 "2021-10-20T03:04:24Z")

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My apologies; I’ve just found this:

> **[Protocol Analyzer SDK](https://support.saleae.com/saleae-api-and-sdk/protocol-analyzer-sdk)**

I was unaware that custom low-level analyzers are also available to me for development.

What an awesome product this Saleae thing is!