# Raspberry PI connect to RS485

**URL:** <https://discourse.nodered.org/t/raspberry-pi-connect-to-rs485/24502>\
**Category:** General\
**Created:** [9 April 2020 07:03 UTC](https://discourse.nodered.org/t/raspberry-pi-connect-to-rs485/24502 "2020-04-09T07:03:25Z")\
**Posts on this page:** 1\
**Showing post:** 32

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**Author:** ![Bond](https://avatars.discourse-cdn.com/v4/letter/b/9dc877/32.png) [@Bond](https://discourse.nodered.org/u/Bond)\
**Post date:** [22 April 2020 01:46 UTC](https://discourse.nodered.org/t/raspberry-pi-connect-to-rs485/24502/32 "2020-04-22T01:46:37Z")

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how did you work out the quantity to be 3?

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