One difficult challenge in working with serial is being able to debug (or see) the data that arrives at a microcontroller via serial.
Serial connects are simple and powerful –but on the microcontroller side they can be VERY hard to debug. oLed screen offer a simple way to display incoming serial data on a microcontroller.
If you have not already done so, you may want to pause here and checkout the intro to oLed screens before proceeding. You can also find additional serial info in the serial demo tutorials.
Circuit
You will need a simple button connected to pin 5 and the oLed connections as shown below. The pull-up resistors are 10K (brown-black-orange).
Video
Code
Grab the code from github,
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