Solution to 13-pin ST7565 to Arduino MEGA2560 using u8g2 sketches

[Gudzys]

What worked for this 13-pin ST7565 backlit LCD:

Pin 1 (chip select) to Arduino D10
Pin 2 (reset) to Arduino D8
Pin 3 (register select) to Arduino D9
Pin 4 (SCL) to to Arduino D11
Pin 5 (SI) to Arduino D13
Pin 8 (3.3v) to Arduino 3.3v
Pin 9 (GND) to Arduino GND

Uncommented this line: U8G2_ST7565_64128N_F_4W_SW_SPI u8g2(U8G2_R0, /* clock=/ 13, / data=/ 11, / cs=/ 10, / dc=/ 9, / reset=*/ 8);

In the prepare section:
u8g2.setContrast(220);
u8g2.setFlipMode(1);

[olikraus]

Clock is SCL, data pin is SI.
I assume the display requires 3.3V, so power and signal pins must be 3.3v
If your Arduino is a 5V version, then you need an HC4050 for the signals.

[olikraus]

Sure, power pins are ok

[Gudzys]

The sketch is running on the device but the back-lighting is so strong that the characters & graphics are barely visible. Am running GraphicsTest now. Any clue about how to reduce the back-lighting?

Had to link pin 8 to 3.3v and 9 to gnd for it to power.

Thanks again for your help. Really appreciated.

[olikraus]

Maybe you need to adjust the contrast with the SetContrast command in u8g2.

[Gudzys]

Yes, that worked. Thanks again for all of your help. Merry Christmas or whatever you celebrate, OK.

Brent

[olikraus]

Christmas preparation already started for me as well 🤗. Merry Christmas.

[Gudzys]

Thank you.

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------- Original Message -------

On Thursday, December 15th, 2022 at 11:46 PM, olikraus ***@***.***> wrote: Clock is SCL, data pin is SI. I assume the display requires 3.3V, so power and signal pins must be 3.3v If your Arduino is a 5V version, then you need an HC4050 for the signals. — Reply to this email directly, [view it on GitHub](#2052 (comment)), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/A4QFT2O5MZWQUNGUFO6HH4DWNQM3VANCNFSM6AAAAAATAKUP74). You are receiving this because you authored the thread.Message ID: ***@***.***>

[Gudzys]

Thank you.

…

------- Original Message -------

On Friday, December 16th, 2022 at 12:00 PM, olikraus ***@***.***> wrote: Sure, power pins are ok — Reply to this email directly, [view it on GitHub](#2052 (reply in thread)), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/A4QFT2ONKWP23A3W5VOPKRDWNTC7JANCNFSM6AAAAAATAKUP74). You are receiving this because you authored the thread.Message ID: ***@***.***>