Speeduino

I've been driving round with the risk of connection loss and a stall, so would like to get reset control working. I decided to just go for the serial command option initially, and have duly connected pin 51 to the reset pin using a wire on the underside of the Arduino. I've selected pin 51 in the settings in TS of course.

However, this seems to make no difference. If I just switch on the ignition, I hear the fuel pump prime as normal and then if I connect the USB cable it re-primes again so is obviously still resetting. It doesn't reset if I pull the cable, but it does if I plug it in again.

I can see that pin 51 is being held high if I measure it with my DVM.

I dunno what I've done wrong?

Megas seem to vary in the ability to resist the reset from the USB/serial chip. I had to add a small electrolytic capacitor (10 uf IIRC) to mine to prevent it.

apollard wrote: ↑Mon Sep 17, 2018 4:59 pm Megas seem to vary in the ability to resist the reset from the USB/serial chip. I had to add a small electrolytic capacitor (10 uf IIRC) to mine to prevent it.

Where did you connect the cap?

Reset pin to ground

apollard wrote: ↑Mon Sep 17, 2018 7:42 pm Reset pin to ground

Thanks I'll give it a try.

ric355, were you ever able to get this sorted? I know it’s an old post but I’m running into exactly the same issue. Thanks.

Lawzracn442 wrote: ↑Mon Aug 10, 2020 1:05 am ric355, were you ever able to get this sorted? I know it’s an old post but I’m running into exactly the same issue. Thanks.

As replied by PM no I didn't bother in the end. Just wasn't worth the effort. I had some reset issues early on but these turned out to be problems with the onboard voltage regulator. That was the root cause of stalls while driving, not USB disconnections.