I'm trying to set up a system using an that delivers a specific number of digital pulses to a device using one of the digital pins. The number of pulses delivered is specified over a the Mega's USB serial connection using a Python script (or terminal for debugging).
When I close the serial connection to the Arduino, I get a short "blip" that looks like a digital high (see image below). This happens when I disconnect in PySerial using
Serial.close() or when I simply close my Arduino IDE terminal window.
It does not occur when I press the reset button on the board
Any ideas on how to get rid of this? Thanks!