I'm a beginner running several Arduino sample programs on a laptop with Vista. They all work fine. But with all of them, the program will stop every 20 seconds or so. Then this happens: -- the "L" light flashes once -- the program stops -- the "RX" light flashes once a second five times -- the program restarts -- the "RX" light flashes three more times -- the sequence repeats
It looks like the Arduino is resetting itself when it receives data from the laptop. I'm using COM7. But I cannot figure out why the laptop would send a reset signal. If I shut the laptop, but leave the Arduino connected, it runs fine without any resets.
break it down, does it do it when the bios screen is up? or the f8 choose os screen? this will help determine if its something in windows. try safe mode. try a loopback cable, or null modem to another serial port, or a serial monitor that looks to see if there is anything on the serial.
open hyperterminal or putty to the serial port, if it opens and it still happens its unlikely its a piece of sofware