Serial I2C LCD 1602 Module (HCARDU0023)

LCD, TFT, OLED, LED modules
colubridae
Posts: 12
Joined: Thu Jan 14, 2016 3:36 pm

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by colubridae » Thu Jan 28, 2016 10:38 am

andrew wrote:Yes, the digital signals from your Arduino to the LCD need to have a ground reference. Similarly your power supply for the LCD needs a ground return path. As both the Arduino and the power supply will then be both grounded to your LCD, their grounds are effectively connected together.

Many thanks Andrew. :)

Jon5
Posts: 1
Joined: Fri Feb 05, 2016 11:31 pm

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by Jon5 » Fri Feb 05, 2016 11:42 pm

Hi,

I'm new to the world of Arduno and treated myself to an Uno+ and I2C after Xmas for a bit of a project.

I've had a problem trying to get the I2C to display text and up until now it would only power on, illuminate but no text displayed. I only just realised there's contrast adjustment on the back of the LCD and after turning it have managed to get text to be barely visible but nothing better. I've adjusted through the full range from one direction to the other but it's only visible at single narrow point.

Is there anything I can do to make the display contrast greater?


Thanks,
Jon

** Update
Disregard that, I'm an idiot and connected the VCC pin on the LCD to the 3.3V 3V3 pin... needless to say connecting it to the correct 5V pin resolves the above issue. :oops:

fusepop
Posts: 1
Joined: Sat Dec 16, 2017 8:23 am

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by fusepop » Sat Dec 16, 2017 8:40 am

Brilliant, finally got it working, thanks to this post.

Many thanks guys.

Al. :D

hmjswt
Posts: 5
Joined: Tue Nov 14, 2017 1:34 pm

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by hmjswt » Sat May 12, 2018 2:16 pm

Hallo,

I am working with the smart LCD module in AT mode.
When I wanted to print a variable it did not respond.
After some trial end error I did find the following solution:

Serial.println("AT+RC=0,2"); // Set cursor to first line position 3
Serial.println("AT+PR=Temperature");
Serial.println("AT+RC=1,2"); // Set cursor to second line position 3
Serial.print("AT+PR="); // Send AT print command
Serial.println( tempC, 1 ); // Print temperatue with one decimal
Serial.println("AT+PR= Celsius");

Is this the correct way to do it?

Thank you,
Henk Siewert

andrew
Site Admin
Posts: 1015
Joined: Sun Aug 05, 2012 4:15 pm

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by andrew » Mon May 14, 2018 8:39 am

Yes, that's the correct.

Btw this is the product thread for the standard serial LCD, you can find the correct one for your LCD here:

http://forum.hobbycomponents.com/viewto ... =75&t=2203
Comments made by this poster do not necessarily reflect the views of Hobby Components Ltd.

mike.bayliffe
Posts: 4
Joined: Tue Feb 18, 2020 3:19 pm

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by mike.bayliffe » Fri Sep 11, 2020 4:49 pm

I have a major difficulty getting access to the "Serial I2C LCD 1602 Module (HCARDU0023)" library download HCARDU0023_LiquidCrystal_I2C.zip

I've tried the link in the forum's posts all to no avail as I get an error from the broswer (Edge) that it's unable to open the link and download the information requested. I'm logged in to the forum and am somewhat fed up with all this hassle. Can someone please give a link that works....???

Mike Bayliffe

andrew
Site Admin
Posts: 1015
Joined: Sun Aug 05, 2012 4:15 pm

Re: Serial I2C LCD 1602 Module (HCARDU0023)

Post by andrew » Sat Sep 12, 2020 8:36 am

I've just checked the link and it seems to be working fine in both Chrome and Microsoft Edge so I have no idea why it's not working for you. I suspect if I just link to it from a different location you'll still have the same problem so I'm going to attempt to email it to you directly.

Edit: I notice you have two email address on file so I've just sent it to the one you used to register this account with. Please let me know if you have any further issues.
Comments made by this poster do not necessarily reflect the views of Hobby Components Ltd.

Post Reply