kuman for Raspberry Pi Screen, 7 Inch Capacitive Touch

This OLED module is very easy to use and works great! At first I did not know how to use it, but then I contacted the seller and they sent me all the necessary information to quickly learn how to use it. The screen appearance is very nice and I was able to use many different fonts with it. I like the yellow and blue colors and text and graphics look very sharp.

I was running a program that used a monochromatic 0.96 inch OLED from another vendor and this one worked just fine just. The I2C interface makes connection easy.

Works great, though had some trouble initially with drivers, even the ones they emailed. Google squix78 on GitHub for drivers that work great with esp8266

These work great as long as you have e the right library.

Perfect!

A waste of money ...wouldnt work!!!

It works great, no complaints. As another reviewer pointed out, the 16 pixel yellow section at the top appears to be separated a bit from the blue section below (48 pixels height) by the equivalent of a couple of pixels, so you shouldn't count on a smooth transition of any kind of animation in that area. But then again, I think the top was designed to host a "header" type information, so I wouldn't consider it an issue. If you want to buy it, just mind the gap :)Something very useful indeed is to use first a piece of utility code that detects (and reports) the I2C address of your OLED display. I can't provide the link that I used, but one can do a search for that.That was definitely helpful in my case because the OLED code example that I happened to use to test it had a different I2C address hardcoded in it (0x3D) than my OLED (0x3C). Without making that change, my display looked as if it were dead, of course, since the communication was attempted with the wrong address.

for such a small display, the text is remarkably legible.The top portion (about 1/5th of the display but don't quote me) is yellow, the rest is a crisp blue.

Pros:- Very clear and bright- Fairly easy to program- Only 4 wires (power, ground, I2C clock, I2C data)- Works on 3.3 or 5 volts- InexpensiveCons:- Not a true 2-color display. Only 1 bit per pixel. The top 16 rows are yellow, the rest are blue, and there's a gap between them.- Documentation I could find seems to be missing some important commands (such as 0x8D set charge pump) and wrong about some bits (0x00 vs 0x40 packet header byte). It also sets up the display in a way that the yellow rows don't work at all (change multiplex from 0x2F to 0x3F to fix that).- The inclusion of commands such as setting charge pumps, precharge, and clock divide, make me afraid of blowing it up if my software were to send a bad command.

This is a tiny device but fit perfectly on the breadboard. It uses the I2C bus and you can set the I2C hardware address via a solder jumper on the back side of the board.It can be a little daunting to find the right library to use. I'll just say that I had better luck using the u8g2lib than the Adafruit library because the latter required commenting-out code in one of the header files and despite that it continued to give warnings. You can use different fonts (sizes, character sets, etc.) With the u8g2lib library, I was able to get it to display Cyrillic (Russian) characters.Note that you should consider the upper band of pixels as a header row, because there is a 1-2 pixel gap between the yellow portion and the blue portion of the display. Overall it's a cute little display. I'm not sure whether I'll be able to use it in a project because it's so small, but I can use it extensively to do debugging tasks without calling up the serial monitor.

Although this product is a tiny screen, the price I paid for it and the time it took to arrive was well worth it.I set up a small script on my Raspberry Pi to notify me of notifications on my phone as well as tracking where my phone was. And I gotta say it worked nicely, the display is pretty good but in the future I'll probably buy a much bigger screen.Overall for the price this product is pretty good, just be aware that you'll probably want a bigger screen in the future.