> For the complete documentation index, see [llms.txt](https://docs.creativeconners.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.creativeconners.com/docs/spikemark/drive-communication/rs-485-upgrade.md).

# RS-485 Upgrade

## Before you begin

Make sure you have the following:

* Stagehand Pro
* Philips head screwdriver
* Small flathead screwdriver
* Resistor kit (2 @ 680Ω) - Contact <support@creativeconners.com> if you need them
* A known working motor or machine
* Spikemark 5.0 or later

## Prepping the Stagehand

1. Unplug the Stagehand and lay it down on its side.
2. Remove the side panel by loosening the thumbscrew on the top of the Stagehand.
3. Look for the model number on the VFD (big grey box) It will either say A800 or A700

![](/files/zYqht7cYbwu03bCvQg46)


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