i hooked up:
128x32 i2c oled lcd ssd1306
to a 3.3 volt keyestudio arduino micro pro
i’m also using a 3.3 volt step down converter
the oled screen
worked great right out of the box.
i just changed the code to change font format.
it displayed great over a two day period.
i even had it outside on a sunny day for a few hours.
it was displaying results just fine.
when i went back out to get everything the screen stopped displaying anything.
i had the whole setup powered with a 6 volt solar panel.
to ensure i was getting enough power to the screen
i even hooked it up to a variable voltage dc power supply and still no luck.
i didn’t have to use any i2c scanner to get it started.
i used the link above to troubleshoot it.
it said no i2c device found…
i didn’t use any pull up resistors based on what i read on other posts.
i’ve confirmed that the
step down converter
3.3 volt arduino pro micro are in working order.
also 3.3 volts are being sent to the screen itself.
i’ve confirmed all this by measuring voltage via my multimeter.
i’ve confirmed that it’s plugged into the correct wiring as shown in pictures.
ironically enough maybe i was seeing things
but i had the sda and scl wires switched backwards and it was working before.
the screen went out during this time.
i had bought two screens just in case and the 2nd one isn’t working either.
i’ve tried both configurations:
- i had the sda and sdl wires backwards
- the sda and scl wires are in correction orientation.
can anyone assist as to what the issue may be?
if anyone wants the cad models for using on their projects
3.3 volt step down converter
bts7960 h-bridge motor driver