# NextionHMI / Raspberry Pi
**URL:** https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976
**Category:** Hardware
**Created:** [10 May 2019 05:54 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976 "2019-05-10T05:54:32Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@mhswa](https://discourse.nodered.org/u/mhswa)
#### Post date: [10 May 2019 05:54 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976/1 "2019-05-10T05:54:32Z")
Hello
I have a Nexion HMI that i would like to control my PCA9685 Hat, I have Node-Red communicating with the servos and it works nicely, But now i need to control the Flow with a Nexion HMI via a usb UART connection. i cant seem to find anything on the internet to help me.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [10 May 2019 07:51 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976/2 "2019-05-10T07:51:07Z")
Nexion HMI does not yield anything useful on Google, do you possibly mean Nextion?
I do see a number of hits on how to connect a Nextion HMI to a Pi.
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### Author:  [@mhswa](https://discourse.nodered.org/u/mhswa)
#### Post date: [10 May 2019 08:11 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976/3 "2019-05-10T08:11:23Z")
Hey Colin
You are correct I just updated the info.
Yes I see but none via a UART TTL cable, I'm more trying to figure out the way to interface with the hmi via node
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### Author:  [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)
#### Post date: [10 May 2019 15:45 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976/4 "2019-05-10T15:45:08Z")
I don't believe there is a direct way. I think that your display is designed to be controlled at a lower level so you have to send the correct commands to it and build the display from a low-level.
You use Nextion's interface creator programme and upload that direct to the display. From that you get data out of its serial connection that you can then interface to Node-RED.
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### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [10 May 2019 16:12 UTC](https://discourse.nodered.org/t/nextionhmi-raspberry-pi/10976/5 "2019-05-10T16:12:07Z")
Pete Scargill @scargill wrote a load of blog posts on these displays