OLED Display 2.42" Conversion from SPI to I2C interface for Arduino

[@terrymeech4149]

Thank you so much! Been trying to get this working for hours! No one else mention R7!!

[@MarkTuttleG0TMT]

Glad it fixed your problem. Sorry it took me so long to spot your comment 😃

[@patrickgemayel4326]

Been looking all over for this info! Finally!

[@MarkTuttleG0TMT]

I had the same problem so that’s why I felt there was requirement for this video. Glad it helped.

[@laldeger124]

Thank you!! I was struggling to get this work and this video helped me a lot! I got it working in the end.

[@MarkTuttleG0TMT]

You’re welcome. I struggled too which is why I made the video to save other people that hassle.

[@360Sebastian360]

I used a bit of tiny wire I cut off of a regular sized resistor to bridge the gap between the two pads on R7 and R5 instead of a zero ohm resistor. I also have adress 0x3C working without any pullup resitors. I am running the adafruit ssd1306_128x64_i2c example with the only change in the code being changing the address to 0x3C. I used an i2c scanner to find the correct adress

[@MarkTuttleG0TMT]

It sounds like you’ve got it all running okay. They seem to produce these displays with at least 2 different I2C addresses so a scanner sketch is worth a try if it doesn’t work first time.

[@icarossavvides2641]

At 6:00 et al, don't you mean SCL not SDL?

[@MarkTuttleG0TMT]

Yes, you’re right. My mistake

[@360Sebastian360]

Thanks for the information!!!! Are you powering the OLED via 5 volts or 3.3 volts ? The ebay listing told me to use 3.3volt

[@MarkTuttleG0TMT]

The one I used was 5V but if you have one requiring 3.3V then I suggest you use a simple voltage divider

[@guyfradasyl88650]

Hi, do you know how to flip from spi to iic for screen nokia 5110 ?

[@MarkTuttleG0TMT]

@@guyfradasyl88650 sorry no, I don’t know that screen

[@guyfradasyl88650]

Hi, since my question,I found that the chip of the nokia 5110 screen can only make SPI communication. So, it is impossible to change the way. Because i want to save some connections, i read that we can put the reset of the screen to the reset pin of the Arduino, and chip select to gnd. You saved 2 gio pin. You could try with your screen.

[@goonmaster_7]

For me R7 already has a resistor which says “472”, do I remove it and bridge the gap or just leave it?

[@MarkTuttleG0TMT]

Remove it and bridge the gap

[@nevermind4667]

it's not really working for me at the moment but I'm a little short on supplies. I don't have the pullup resistors do you really need them.

[@nevermind4667]

just got it working without the pullup don't know If i really need them

[@MarkTuttleG0TMT]

@@nevermind4667 They're certainly recommended but if you code the ports to have pullups you might get away with it.

[@nevermind4667]

@@MarkTuttleG0TMT i have used it for a day now and it's working fine itm I hope I don't need them in the future so I dont have to make a new PCB

[@MarkTuttleG0TMT]

N3V3RD01T well I hope my little video helped, that’s why I made it. 👍

[@360Sebastian360]

In summary, for I2C : short R7,R5. Move R4 to R3. make sure to plug reset pin to arduino

[@JimCoupeTQ]

Hmm didnt work out for me either :( o i2C devices found

[@MarkTuttleG0TMT]

Are you sure you have the correct address for your device? Maybe try running an IC2 finder sketch