Can't get LCD-17153 (0.91in OLED V1.0 128x32) to work

Components & Accessories Displays
1

I bought two of these devices and can’t get either one to display anything. I’m connecting them using qwiic connectors to an ESP32 (Adafruit Huzzah 32).

I’ve tried using esphome and the Adafruit_SSD1306 library directly (https://github.com/adafruit/Adafruit_SS … 32_i2c.ino).

It appears the device is communicating over the i2c bus correctly (address 0x3c), but there’s no output on the display.

There’s not much information to go on in the product page about the hardware (https://www.sparkfun.com/products/17153). Is there more available?

Is it possible I damaged them? I had them briefly wired up with SDA and 3.3V swapped due to a bad cable.

2

Aha! I got it working with a different power supply.

It seems these displays are a little picky about input voltage. It didn’t like the 3.25V off my ESP32 board but the 3.35V off my external power supply worked fine.

3

Glad you got it working!

I’m trying to troubleshoot an issue right now that might have been a similar cause, only it seems I fried the little 3-pin device on the back. I can only assume its a transistor. The writing on it says “SPTN”. Trying to find out what the part is, will update if I find it.