Hi everyone, I am trying to connect a 4x20 LCD display to my Spark Core and cannot get it to work, no matter what I try. If I connect this LCD to Arduino it works perfectly fine. I did some Arduino projects before but I am new to the whole Particle thing (maybe that’s the issue) - I just found the…

@marcg , the IDE library lets you define the geometry also. Just change this line in the example: lcd = new LiquidCrystal_I2C(0x27, 16, 2); // Change 16,2 to 20,4

@marcg , everything seems to be fine with power and pull-ups and connections. On the Photon, you don’t need #include <Wire>; so you can comment that out. What version of Particle CLI are you using?

[image] peekay123: On the Photon, you don't need #include <Wire>; so you can comment that out. Spark Core... I2C was a little bajiggity on that device. more here

I just installed it so I just assume the newest one? It’s 1.20.1 Also, it’s not a Photon, it’s a Spark Core - can I still remove the Wire?

@marcg , I just test a 16x2 LCD with the same piggyback board and got it working with 10K pull-ups. Which library are you using? I am using the LiquidCrystal_I2C_Spark library from the web IDE. The example is working just fine.

I am using the LiquidCrystal_I2C library with this header: // --------------------------------------------------------------------------- // Created by Francisco Malpartida on 20/08/11. // Copyright 2011 - Under creative commons license 3.0: // Attribution-ShareAlike CC BY-SA // // Thi…

Well… don’t I feel silly now. I came across that library before but didn’t try because it didn’t have a 20x4 example… doh! :confounded: [image] Thank you very much - works like a charm with that library! Still had the compiler issue on Desktop and CLI, got it working using Web IDE. Any ideas abo…

You should open a new thread for that and place a link to it here. Also please include the whole log including the actual command used and some more background about your code and project structure.

Connect 4x20 I2C LCD to Spark Core fails

Troubleshooting

BulldogLowell March 17, 2017, 2:30am 3

Spark Core...

I2C was a little bajiggity on that device.

more here

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Trouble getting LiquidCrystal_I2C_Spark library to work Getting Started	12	3408	August 23, 2015
LCD i2c (Lib+Info+CustomCharacters) Tutorials	18	14377	July 4, 2015
Liquid Crystal Library Libraries	23	16567	July 26, 2017
LCD & Spark core Getting Started	1	1642	June 8, 2014

Connect 4x20 I2C LCD to Spark Core fails

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