I have a display that comes with GM328 component tester. Nothing is marked on it. I would like to use it ESP32. (GM328 broke).
I searched a lot on the net, but couldn't find an exact match.
Looks like it is a 1.5" OLED display. It has HEF4050BT chip on it, one smd resistor and 3.3v regulator ic.
It has 8 pins
Some images would help. The HEF4050BT is a CMOS hex non-inverting buffer chip (manufactured by NXP I think). I'm guessing that the chip is level shifting 5V signals down to 3V3.
Here's a schematic that I found via a quick google search:
The schematic indicates that the display uses an ST7735 controller chip. There's an Arduino library here that may help:
https://docs.arduino.cc/libraries/adafruit-st7735-and-st7789-library/
Assuming of course that your GM328 is built as per the schematic.
Thank you so much.
I need the PIN info too.
The schematic is your friend.
Yes thank you. Noticed it a little latter.
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