New computer low reliability

[ricks03]

I've been running 8 temp/hum sensors and a relay board on my PC, and submitting reads on the wire over serial (using Misterhouse) has been rock solid.

Recently I upgraded my PC, and moved the reading of temp information into a VM.

Now I'm regularly dropping signals, hearing from only 7 of the 8 sensors (random) most of the time.

I had redone some of the wiring, but moving the wiring back to the old PC is still rock solid so I don't think that's it.

I'm wondering if the new PC (Asus M2AVM-HDMI ) has any known issues with the serial port? Because it's either that or the reading of the serial
through the VM that's probably causing me issues. I'm trying to narrow down, because moving the 1 wire reading back to the physical machine will be very time consuming.

thanks for any insights.

rick

 

[ericvic]

Rick,

I'm thinking that it is the VM that is causing the problem. The 1-Wire adapter is pretty sensitive to the timing of the RS-232 data and I know that it doesn't like some USB<->Serial adapters.

Eric

 

[electron]

For what it's worth, I have many virtual machines deployed where I work (and at home as well), all using serial ports without any issues. The only difference is that I use several of those large RocketPort multiport serial units on the Host, then use serial-to-ethernet software to bring the port into the VM. So if you do decide it's the VM, you might want to try that approach, since it might deal with the sensitive timing issues.