I have an LCD1602 which I've soldered to a I2C module converter and connected the 4 pins to the proper locations (SDA to A4 and SCL to A5) on the arduino uno. The problem is, the backlight and the contrast adjuster work, but nothing happens on the screen when I try to print something, and yes, I have tried I2C scanner program and it just stays stuck at "Scanning..." on the serial monitor which only happens when the SDA Pin on the LCD is plugged in, no other pin affects it.
I tried checking my soldering connections, all are fine and have continuity. So, I'm at a loss and I have 0 idea what might be the cause, what do you guys think?
Show the LCD, or a link to it if you bought it. Particularly, show the main chip of the LCD clearly. You are aware there are compatible, and not-so-compatible LCD devices? They don't all have the same chip. Also, identify the I2C adapter you've used, with a good photo of it.
If you used the scanner that comes with the IDE, we don't need to see that listing unless you modified it. Your code, however...
We think you made a wiring or soldering error, but can't say for sure.
... is irrelevant if the i2c scanner can't find the LCD backpack.
Its unmodified, just plain I2CScanner
1 Like
Test your Dupont wires, they are unreliable.
No they do work I just continuity tested the 4 cables, I even used other cables, nothing has changed.
sure do
It needs doing better.
Hmm, alright will do, thank you!
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.