BlakeGarner
commented
3 years ago Hi, You're right - the Adafruit boards are electrically suitable, but mechanically the PCB dimensions and pin-outs do not line up with the PCB. Short of re-laying out the PCB or some unwieldy adapter board, they're not appropriate for this build.
The DFRobot boards get closer, but not close enough - they're still a little big and the pinout does not match what the PCB requires (from top to bottom: SDA, SCL, VCC, GND).
I ordered my boards from AliExpress. The quality can be variable, so you may wish to order a few spares. I hesitate to link to a particular seller as I can't vouch for their quality, but a search for "128x32 I2C SSD1306" on aliexpress should yield a number of results. You're looking for something like the attached image:
Key things to look out for are:
- the pin order (SDA, SCL, VCC, GND)
- dimensions of 38x12mm.
- Works at 3.3V
- I2C / SSD1306 for the comms protocol. (I2C is the bus protocol in use and SSD1306 is the messaging standard sent over the bus)
Thanks for the report - I will update the documentation at some point to make the above clearer (or PR always welcome too).
Good luck with the build!
Hi, not sure if this is the right way to ask you a question, but it looks like I screwed up when ordering the OLED boards for this project. I got this: https://www.mouser.ca/ProductDetail/Adafruit/4440?qs=xZ%2FP%252Ba9zWqYbvx21FF7rSQ%3D%3D
But when looking through everything today, the pins don't match up. It was the one part I wasn't really able to find from your BOM/parts list. Can you recommend the correct part to me on mouser or Digikey? Or does something like this have the correct pin layout? https://www.dfrobot.com/product-2019.html
Thanks in advance for your expertise, I'm definitely new at building a project like this and I appreciate any help to point me in the right direction!