# I2C lcd 16\*2 and raspberryPi ....Help

**URL:** <https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408>\
**Category:** General\
**Created:** [9 May 2022 14:39 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408 "2022-05-09T14:39:22Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![node2](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@node2](https://discourse.nodered.org/u/node2)\
**Post date:** [9 May 2022 14:39 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/1 "2022-05-09T14:39:22Z")

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i've been attaching the i2c LCD to raspberry, i can only turn off the lcd on and off using msg.action, but while integrating a function , the LCD remains blank.... 🙃

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**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [9 May 2022 16:33 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/2 "2022-05-09T16:33:22Z")

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You haven’t given much information. You haven’t said what the function does, you haven’t told us where it is in your flow we don’t know the version of node-red or node-js, what pi you are using, what os?

When you want help, it’s best to provide enough information so the person - who is volunteering their time to help you - has enough information to help you.

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**Author:** ![node2](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@node2](https://discourse.nodered.org/u/node2)\
**Post date:** [10 May 2022 08:48 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/3 "2022-05-10T08:48:48Z")

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![2022-05-10-094415_1680x1050_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/b/c/bc3c7ca08359d3635ef10f47f8ac0a3374501040.png)  
here you can see the raspberry couldnt read the i2c....i tried several functions from other people's flows...i'm using a rasp os + node v 2.1.6+ pi 4

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**Author:** ![jbudd](https://avatars.discourse-cdn.com/v4/letter/j/5f8ce5/32.png) [@jbudd](https://discourse.nodered.org/u/jbudd)\
**Post date:** [10 May 2022 08:54 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/4 "2022-05-10T08:54:05Z")

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As you say, the pi doesn't see any i2c devices, so it's not a node-red issue.

Probably the raspberry pi forum is the best place to ask for help, but have you enabled i2c in raspi-config?

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**Author:** ![node2](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@node2](https://discourse.nodered.org/u/node2)\
**Post date:** [10 May 2022 08:59 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/5 "2022-05-10T08:59:42Z")

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![2022-05-10-095829_1680x1050_scrot](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/7/9717c0b4600a8f48aca196f6946510607c11094b.png)  
now the address can be detected ....but the problem remains....no data showsup at the screen

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**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [10 May 2022 10:12 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/6 "2022-05-10T10:12:52Z")

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Please start up node-red and copy and paste the startup log in a reply.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [9 July 2022 10:13 UTC](https://discourse.nodered.org/t/i2c-lcd-16-2-and-raspberrypi-help/62408/7 "2022-07-09T10:13:09Z")

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