pump and multiplexer errors

[mpatterson]

As an update, I did just reclean all moisture sensors with alcohol and all USB and power cables and ports with compressed air, but I am still getting the errors.

[harrison]

Hi Mpatterson,

It is an error arising during the I2C digital communications, often due to (for example) the signal from the reactor to the pump having a lot of noise in it potentially leading to issues. If you have already cleaned the moisture sensors and cable ports there isn’t a whole lot you can do with it. Shorter micro-USB cables would help, as would taking the reactors away from any kind of massive electrical noise source if there was one nearby, though probably this is unlikely.
If it is still running happily enough I suppose let it go as-is. If it gets worse maybe try sourcing some different micro-usb cables and swap them out, perhaps the ones you have are from a dodgy manufacturing batch…

Harrison

[mpatterson]

Okay, we have everything in a cooling incubator so we can run at low temperature. Do you think that would be enough?

[harrison]

I am not sure I follow – i.e. are you proposing that low temperature will help the digital communications?

If it is just doing occasional errors I would leave it as is. If you think it is getting worse then I would consider replacing the microUSB cables as you may have bad ones.

[mpatterson]

No, sorry, I mean we have all of the reactors, control computer, and pumps inside of a Binder cooling incubator. I was asking whether the incubator itself would be enough of an electrical noise source to be causing these errors.

[harrison]

I wouldnt have thought so. If it is getting _worse_ over time it certainly seems unlikely to be the culprit.

[mpatterson]

Okay thanks, I will try replacing the cables.

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