# How to connect the RS485 by urcap

**URL:** <https://forum.universal-robots.com/t/how-to-connect-the-rs485-by-urcap/28658>\
**Category:** Technical Questions\
**Created:** [May 27, 2023, 9:44am UTC](https://forum.universal-robots.com/t/how-to-connect-the-rs485-by-urcap/28658 "2023-05-27T09:44:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nghia.nk97](https://avatars.discourse-cdn.com/v4/letter/n/f14d63/32.png) [@nghia.nk97](https://forum.universal-robots.com/u/nghia.nk97)\
**Post date:** [May 27, 2023, 9:44am UTC](https://forum.universal-robots.com/t/how-to-connect-the-rs485-by-urcap/28658/1 "2023-05-27T09:44:22Z")

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I develop the urcap using RS485 and some gpio. I read [GitHub - UniversalRobots/Universal\_Robots\_ToolComm\_Forwarder\_URCap: Utility to forward the UR Tool Communication Interface (RS-485) to a remote PC.](https://github.com/UniversalRobots/Universal_Robots_ToolComm_Forwarder_URCap), [GitHub - EbbeFuglsang/Modbus\_URCap: A tool modbus RTU URCap](https://github.com/EbbeFuglsang/Modbus_URCap) . But, I can’t understand. Plese tell me how to connect, control the RS485 in urcap