# RS485 communication of E-serial tool IO

**URL:** https://forum.universal-robots.com/t/rs485-communication-of-e-serial-tool-io/32092
**Category:** Technical Questions
**Created:** [January 12, 2024, 6:56am UTC](https://forum.universal-robots.com/t/rs485-communication-of-e-serial-tool-io/32092 "2024-01-12T06:56:44Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![jordonwyx](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/jordonwyx/32/1806_2.png) [@jordonwyx](https://forum.universal-robots.com/u/jordonwyx)
#### Post date: [January 12, 2024, 6:56am UTC](https://forum.universal-robots.com/t/rs485-communication-of-e-serial-tool-io/32092/1 "2024-01-12T06:56:44Z")

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Hello All  
I really want to communicate with 3rd-party tools with RS485 of tool IO. I have followed some examples, but unfortunately, it’s failed.  
I upload serial files and tciDaemonServer.py to the robot, then connect the robot by ssh, and i use one cable rs845-to-usb to connect tool IO to my computer, then I execute “echo hello \> /dev/ttyTool” in the command line, the data that my computer only received is 00, not “hello”, i don’t know why? But when i execute “cat /dev/ttyTool”, i can see the data from computer. is there any one can help me out? Thanks in advanced!