I need to buy some OLEDs for an IoT class. SparkFun has one that I’ve used before, but it’s $16 apiece. <a href="https://www.amazon.com/Dorhea-Display-SSD1306-Self-Luminous-Raspberry/dp/B07WPCPM5H/ref=asc_df_B07WPCPM5H/?tag=&linkCode=df0&hvadid=386649289423&hvpos=&hvnetw=g&hvrand=4764532421586912638&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9019441&hvtargid=pla-835740912703&ref=&adgrpid=77847887414&th=1" rel="noopener nofollow ugc">This one , from Amazon is $21.99 for 6, definitely more in my league, budget-wise. Does anyone have any experience with this, or, before I place my $21.99 bet, can see why it wouldn’t work?

Several reviews on the amazon page talk about the I2c address being inconsistent with the labeling, I mentioned that in the beginning of this thread . Check through the reviews and you’ll likely find the correct address, or a more direct approach would be to use an I2c scanner to find it.

I’ve used them. They work fine. Like any OLED, the pixels will fade over time if you keep them turned on. I’ve had one running connected to a Core for over a year and you can tell.

I haven’t bought that specific one, but I get the really cheap SSD1306 multi-packs from Amazon and they’ve always worked fine for me. As pilottrack pointed out, they do become dim over time. Now I put them in sockets so I can just replace them after a few years when they wear out. For a class this …

There are some crazy prices sometimes. This seems legit as well.

I tried hooking up my <a href="https://www.amazon.com/Dorhea-Display-SSD1306-Self-Luminous-Raspberry/dp/B07WPCPM5H/ref=asc_df_B07WPCPM5H/?tag=&linkCode=df0&hvadid=386649289423&hvpos=&hvnetw=g&hvrand=4764532421586912638&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9019441&hvtargid=pla-835740912703&ref=&adgrpid=77847887414&th=1" rel="noopener nofollow ugc">new OLED , and … nada. I’m using the Adafruit_SSD1306_RK library – I wasn’t sure which one, but the initials sounded reassuring :grinning: – and I am using the 128x64_i2c.ino example. I’ve connected SCL to SCL, SDA to SDA, GND and 3V3. On the back of the board is a label, IIC A…

I sue the library Adafruit_SSD1306.h v0.0.2 from WebIDE. The ssd1306-128x64-i2c.ino example worked for me in the past. Not sure which OS version I was running, but it was pre-2.0

Thanks. I’m using 3.1.0, maybe that’s the problem? Or maybe the reason the OLEDs were so cheap answers my question – too good to be true? – in the affirmative.

Oh, I get it now … thanks so much for responding again, I didn’t quite grasp the significance of the address the first time. I did an i2c scan, found the right address (0x3C), and now it’s working! The colors are a bit weird, the top 10% of the screen is in yellow, the rest in blue, maybe this has b…

Good to hear that took care of the problem.

@Mjones & @mprogers , the issue with I2C addresses is that some state the 8bit base address (with the bottom bit distinguishing between read and write address) while others opt to give you the 7bit address (8bit >> 1) - Particle and most others use the 7bit address. Hence it's always good to first c…

Inexpensive OLED - too good to be true?

Hardware

Mjones January 10, 2022, 1:09am 2

I haven’t used these, but I’m gonna order a batch. The reviews are all good, but pay attention to the i2c address comments.

Topic		Replies	Views
OLED 128x64 i2c help and advice Hardware	19	14337	June 13, 2018
SSD 1315 with SSD 1306 library? Libraries	4	2521	May 17, 2024
Adafruit OLED SSD1306 0.96" 128x64 Libraries	8	2581	October 31, 2016
Adafruit SSD1306 Library [Ported] Libraries	143	42568	April 2, 2018
Troubles with SSD1306 OLED Troubleshooting	5	2338	December 29, 2019

Inexpensive OLED - too good to be true?

Related topics