# Have writing to a usb to RS-485 adapter working but how do I read back the response?

**URL:** <https://discourse.nodered.org/t/have-writing-to-a-usb-to-rs-485-adapter-working-but-how-do-i-read-back-the-response/29319>\
**Category:** General\
**Created:** [1 July 2020 15:31 UTC](https://discourse.nodered.org/t/have-writing-to-a-usb-to-rs-485-adapter-working-but-how-do-i-read-back-the-response/29319 "2020-07-01T15:31:23Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![jeffreys](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jeffreys](https://discourse.nodered.org/u/jeffreys)\
**Post date:** [1 July 2020 18:32 UTC](https://discourse.nodered.org/t/have-writing-to-a-usb-to-rs-485-adapter-working-but-how-do-i-read-back-the-response/29319/6 "2020-07-01T18:32:15Z")

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[https://discourse.nodered.org/t/ascii-convert-control-character/26140](https://discourse.nodered.org/t/ascii-convert-control-character/26140)

I think this is close. Somehow I need to read what has been sent back and calculate a crc and then set that for the end of the incoming message... ( kind of like how they were using /r to return )....

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