On power up it’ll show “Sparkfun OpenLCD Baud:9600 1.4” But nothing else after it flashes that for a brief second. I have a very simple code but I can’t see anything. It this LCD connected with a qwiic connector. SparkFun 20x4 SerLCD - RGB Backlight (Qwiic) - LCD-16398 - SparkFun Electronics The…

This is new, after sitting on for a bit I have the black squares and a new character. The code is running to display “test” every 100ms and has ran for ~5mins. [unnamed (17)] n You can see the backlight is on.

Try the default example code far down here AVR-Based Serial Enabled LCDs Hookup Guide - SparkFun Learn If that doesn’t get it going, try disabling the i2c pull-up resistors on the backside of the display by de-soldering the blob and re-test

Please try according to TS-Russel’s advice. Also check the cable.

Thank you for the suggestions but that did not work. The cable works, it reads connected with my multimeter from the connector pins on both sides. That’s the code I’ve been using to test but still nothing. It says the intro message on boot up but then nothing else. Removing the blob on the pull …

Can't get my LCD to display after boot up

Qwiic System

TS-Russell September 24, 2024, 10:54pm 6

Try the solution here if possible SerLCD 4x20 showing block characters on SPI C/S toggle - #3 by h00die and if that doesn’t work file for a return Return Policy - SparkFun Electronics

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Can't get my LCD to display after boot up

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