# Nodered modbus and Click PLC
**URL:** https://discourse.nodered.org/t/nodered-modbus-and-click-plc/96824
**Category:** General
**Created:** [30 April 2025 10:29 UTC](https://discourse.nodered.org/t/nodered-modbus-and-click-plc/96824 "2025-04-30T10:29:27Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@yawstick1](https://discourse.nodered.org/u/yawstick1)
#### Post date: [30 April 2025 10:29 UTC](https://discourse.nodered.org/t/nodered-modbus-and-click-plc/96824/1 "2025-04-30T10:29:27Z")
Curious if anyone has attempted to use raspberry pi running nodered with node-red-contrib-modbus to communicate with clickplus PLC which supposedly supports modbus
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [30 April 2025 11:04 UTC](https://discourse.nodered.org/t/nodered-modbus-and-click-plc/96824/2 "2025-04-30T11:04:23Z")
Modbus on a PI works fine.
If the modbus implementation on the PLC is standard there is no reason it won't work.
However, there are several threads on this forum around clickplus PLC and all of them seem to be using mqtt. If the PLC supports mqtt, can you not use that instead?
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### Author:  [@yawstick1](https://discourse.nodered.org/u/yawstick1)
#### Post date: [30 April 2025 13:02 UTC](https://discourse.nodered.org/t/nodered-modbus-and-click-plc/96824/3 "2025-04-30T13:02:56Z")
I did try the mqtt first as I'm much more familiar with it.. I've used it quite a bit communicating between esp32 and node red on raspberry pi. I found the mqtt implementation a bit lacking on the PLC.. msgs were stored as individual characters in plc memory so it would make string compare tedious... so I did not pursue it much past that... The objective was to use a touch screen monitor with the raspberry pi to create a poor mans HMI for the click.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [29 July 2025 13:03 UTC](https://discourse.nodered.org/t/nodered-modbus-and-click-plc/96824/4 "2025-07-29T13:03:39Z")
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