How does arduino auto reset work

When not plugged in, no problem. On this project, I have 4 buttons. The screen itself would blank out basically reset itself when I sometimes pressed a button. Interestingly, this only happened when plugged into USB. If on the 5V power supply, no problem. I even monitored voltage and current draw to see if there was something dragging things down. But nope. Max current draw, with screen at full brightness was only 50mA.

Well, at least with this thread, I now know that it is in fact the USB connection that's causing this issue. I can work around that. Does your windows machine hibernate?

Does Arduino reset when first connected to USB? Using Arduino Project Guidance. What happens when you try it? I have made a few Serial programming tools with Visual studio, its actually quite easy. Drop your use of Serial. I added a one second delay and the code worked just fine. What do you think it does? Which version of the IDE are you using? Read the reference page for it. I had an ethernet based web server that ran for well over 6 months unattended, using C strings instead.

It actually never crashed, I just had to power it down once to move some power plugs. Could you elaborate further on the difference between the 'string class' and the 'c string' you mentioned?

And perhapse give an example so I can understand what you are talking about please? Forcing a jump to address 0 only works if your sketch has not locked up before then. If your code locks up, the watchdog timer will reset your Arduino. After 7 days you can stop resetting the timer to force the watchdog timer to reset the Arduino. Note: If you have any operations that may take more than 8 seconds, like a DNS lookup for example, you can disable the watchdog timer before the call and re-enable it after.

I tried to use the Blink sketch to alternative pin 13 led low and high every 5 seconds. I then connected pin 13 to the reset pin and ran the sketch. After 5 seconds of Pin 13 being high, it goes to low for 5 seconds and then back to high which I expected would trigger the reset pin but instead it kept the lead dim and the program would stop working until I removed the wire connected pin 13 to the reset pin.

Is there an easier way to reset the Arduino using a sketch? If not can anyone tell me what I might be doing wrong?

BTW I just tried using a 1. I am assuming it's like this because the program doesn't have a chance to start running and trigger the 13 pin back to high. Thank you, but does that code reset the program or reset the Arduino? I need something to reset the Arduino.