Does this need to be soldered?

Other Hardware Displays
1

I bought an I2C LCD from amazon:

And I have a problem, only the backlight turns on.
The screen flickers too and I've started to ask myself if it needs to be soldered.

I tried to adjust the contrast, but still, no result.

This is my code:

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup()
{
  lcd.init();
  lcd.backlight();

  lcd.clear();
  lcd.setCursor(0, 1); 
  lcd.print("Hello World");
}

void loop()
{
}

Photo:

0-02-0a-ae851b1f9b596cc58513a75553794f8418a0201026d488faf29e459a99396d72_43a258c85cabb3ee
0-02-0a-ae851b1f9b596cc58513a75553794f8418a0201026d488faf29e459a99396d72_43a258c85cabb3ee720×1601 87.8 KB

2

Not just needs, but absolutely must be soldered!

3

You must solder.

You can solder a female header on the LCD display then you can plug the backpack into this header.

4

when you say backpack, do you mean the i2c adapter?

5

Yes

6

oh, then i can't xD
coz i don't have a soldering machine or smth like that

7

can't I connect it to a breadboard?

8

Yes you can.

But then you need to solder a male header to the LCD display.

9

Yes.

10

how so?

11

See post 8.

Buy a soldering iron and 63/37 or 60/40 solder.

12

Get one premade. https://www.ebay.com/itm/383273086356?hash=item593cdb2d94:g:Q6YAAOSwSK9d0u0Y&amdata=enc%3AAQAHAAAA4BAaVHFZkycSpdFOuRmS1L%2FU5yoRYuEff3RqBNEnXArCRuGKLG%2BVN6D7yMEgYm%2BxIYzleuap0afoYT96GrEmeIwiFjjgrpcMiTzwIMziHvGWetSXS7UdbRmdE6kC2kXyISMrGuUEpxzxByq5H4eFZaDypyrAJjTrp9yXziZApqijj927mEQkVQcNfgQYzG4IponRWWg8w3T%2FvpfkXsA0TuWH8WYKMokoZhVly%2FsdaTcDryydBBa33AtCA1L74Z8jDV04%2FbtB2SELFD9twS%2Fg6SyvamephTb8dx8p3O4DMOrI|tkp%3ABFBMxr6_7ZBh

13

say, one header or several headers?

14

Looks like you need a 1X16 female header to match your backpack male header.

Make sure the backpack is plugged into the new female header the right way around.

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15

can you make me a sort of drawing because I don't understand where to plug them in

16

oh wait nvm i understand now

17

This is how the soldered female header should appear.

image
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18

Then buy one, or give up electronics and find something else to do.

19

Yes.

You can get one pre-soldered. Search Amazon for "LCD i2c"

20

And that's exactly what i did xD