Make sure you’ve the LED screen attached in the right orientation. Try removing it and rotating it 180 degrees and see if that fixes the problem.
Be sure to follow the setup guide fully, and make sure you have the recommended drivers installed. If you are still having problems, try closing the Arduino IDE and restarting it again.
The drivers for the Petduino microcontroller don't come digitally signed which unfortunately can cause problems in some operating systems if digital signatures are required. On these systems you will need to disable this setting before you can use your Petduino.
On windows, you can run the following commands in a command window followed by a system restart to allow the use of unsigned drivers:
bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS bcdedit -set TESTSIGNING ON
To re-enable integrity checks at any time, you can run the following commands followed by a system restart.
bcdedit /deletevalue loadoptions bcdedit -set TESTSIGNING OFF
If you would like to leave your system with integrity checks disabled, you can run the following software to remove the "test mode" watermark that windows adds to your desktop wallpaper whilst integrity checks are disabled.
For OSX users you can allow the use of unsigned drivers by setting the kext security settings to dev mode by issuing the following command in a terminal window.
sudo nvram boot-args="kext-dev-mode=1"
To reset the kext signing security setting at any time, you can run the following command.
sudo nvram -d boot-args
Be sure to check all solder joints and make sure you don’t have any weak connections. This could prevent things from working as expected.
Many of the component parts are standard off the shelf "through hole" components so can be purchased from places such as Pimoroni, CPC or RS-Online (to name a few). If you are having trouble locating a part though, feel free to get in touch and I'll help you find what you are looking for.
If you still can’t find the answer to your problem, please feel free to drop us an email to firstname.lastname@example.org and we’ll do our best to help.