# Trying to send text to LCD over i2c contrib

**URL:** <https://discourse.nodered.org/t/trying-to-send-text-to-lcd-over-i2c-contrib/47873>\
**Category:** General\
**Created:** [1 July 2021 03:14 UTC](https://discourse.nodered.org/t/trying-to-send-text-to-lcd-over-i2c-contrib/47873 "2021-07-01T03:14:21Z")\
**Posts on this page:** 1\
**Showing post:** 50

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**Author:** ![Gunner](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/gunner/32/43582_2.png) [@Gunner](https://discourse.nodered.org/u/Gunner)\
**Post date:** [1 July 2021 06:39 UTC](https://discourse.nodered.org/t/trying-to-send-text-to-lcd-over-i2c-contrib/47873/50 "2021-07-01T06:39:14Z")

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Well... I have now tried two different nodes...

# 1) node-red-contrib-lcd20x4-i2c

- Figured out the correct way to communicate
- But **NO** action on the physical display via NR (Py script on RPi works, so address settings & wiring are correct)

**--- I am going to shelve this one as unobtanium**

# 2) node-red-contrib-i2clcd-alt

[https://github.com/tek79/node-red-contrib-i2clcd-alt](https://github.com/tek79/node-red-contrib-i2clcd-alt)

- No way to easily import, had to learn how to do so manually 😛
- looks simpler to interface, but... noooo

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/4/0/40ed607a85df351e3ebe047416305ccae901c416.png)

![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/e/9/e97f3c62ae4df471afd562aaa45cc1c3f6b60519.png)

```auto
6/30/2021, 11:36:37 PM[node: i2clcd-alt](http://10.10.3.13:1880/#)msg : error

"TypeError: Cannot read property 'localeCompare' of undefined"

```

New and strange errors that I have yet to find a suitable Google explanation for

---

_[View the full topic](https://discourse.nodered.org/t/trying-to-send-text-to-lcd-over-i2c-contrib/47873)._