LCD display working with standard Arduino board and not with Ruggeduino

Other Hardware Displays
1

Hello,
I am trying to get a SSD1306 128x64 OLED LCD module to work with a Ruggeduino Uno board I have.

The display works fine with the example program on a standard Arduino Uno board, but does not work with the Ruggeduino boards.

I have ground connected to 0v, VCC to 3.3.v, and have tried it both using SDA to A4 pin and SDL to A5 pin, and also using the SCL/SDA labeled pins on the Ruggeduino board. Neither are allowing the Ruggeduino board to work normally. What the screen does do is turn on with the last thing displayed on the normal Arduino board (the one that works).

Any ideas what would cause this problem? I've contacted Ruggediuno and they didn't really have any suggestions. They suggested I try to jumper across the PTC on A4 and A5, but this doesn't change anything. Could there be some setting change I need to make in the software?

2

Are you sure your sketch is uploading to the rugged uno?

I thought it needed a different usb driver.