# \#rk3288

**URL:** https://forum.aim-linux.advantech.com/tag/rk3288/15.md

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## [\[How-to Article\] How to test RS-485 on RSB-4680?](https://forum.aim-linux.advantech.com/t/how-to-article-how-to-test-rs-485-on-rsb-4680/21)

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**Author:** [@phill.liu](https://forum.aim-linux.advantech.com/u/phill.liu)\
**Replies:** 0\
**Last updated:** [December 21, 2021, 2:54am UTC](https://forum.aim-linux.advantech.com/t/how-to-article-how-to-test-rs-485-on-rsb-4680/21 "2021-12-21T02:54:34Z")

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Problem Description: Testing RS 485 with Adam-4520 Answer: Prepare RS-232 to RS-485 converter (Adam -4520) COM4(232/485) (ttyS4 , 115200) , CN18 : Pin4 and Pin6 (jumper) Note : DB9 Pin 1 DATA - and DB9 Pin2 are …