[Nut-upsuser] Richcomm Serial driver

Manzoor e Elahi manzoor.e.elahi at gmail.com
Sat Apr 23 19:33:24 UTC 2011

Thanks for your replay. Actually my UPS uses a lite version of that software
and only reports mains on/off, ups on/off and ups connected/disconnected
status. I also think the genericups driver should work and tried all the
driver types without any luck. Unfortunately I can't afford to ditch the UPS
right now. I'll try the serial sniffing technique or use a multimeter to
find out what's happening through the serial port. I've some experience with
those. Can you give me some idea what I should be looking for?

One more question. Is it possible to use a USB to serial cable for a serial
UPS with generic UPS driver? This combination works in Windows with the
official software but what about NUT? Is any special configuration required
for this?

Thanks again...


On Sat, Apr 23, 2011 at 3:54 PM, Arjen de Korte <nut+users at de-korte.org>wrote:

> Citeren Manzoor e Elahi <manzoor.e.elahi at gmail.com>:
>     I'm trying to configure my ups with nut which is a locally made one. It
>> uses a rs232 port to talk to the computer and comes with a software called
>> "Powermanager Lite" which is provided by Richcomm and supports Windows,
>> Linux and UNIX. According to the manual it uses the Richcomm circuitry to
>> talk to the computer and uses a drycontact protocol. Unfortunately I
>> couldn't find any driver for Richcomm serial interface, there's a
>> richcomm_usb however. I've tried all of the genericups drivers and the
>> megatec driver even a USB to Serial converter cable (Prolific chipset) but
>> no luck. Any suggestion about which driver to choose or what I'm doing
>> wrong?
> If it indeed uses a dry contact interface, it is supported by the
> genericups driver. If not through one of the existing 'upstype' settings,
> you should be able to override the 'CP', 'OL', 'LB' and/or 'SD'
> configuration directives to make it so. This is essentially what the
> 'richcomm_usb' driver does for USB.
>     I'm using NUT on FreeNAS 0.7.2 which uses NUT 2.60. Below is the link
>> to
>> the Richcomm product product page.
>> Powermanager lite:
>> http://www.richcomm.com/en/productshow.php?ippt_product_id=65
> This is not a description of a dry contact interface. If this is what your
> UPS is using, it requires something different. Assuming the people who
> designed this did not create a smart protocol using the modem control lines
> (which would be insane, since using the TXD/RXD lines would be much simpler
> instead), I would say this is a smart protocol which is not supported
> through either genericups or richcomm_usb.
> The best advice we can give you is to first find out what protocol is used
> by the UPS (possibly by snooping the serial port when running the bundled
> software). Unless you have dozens of devices you have to use and/or you
> hourly wages are close to zero, it is probably better to ditch the UPS and
> buy something that is supported out of the box.
> Best regards, Arjen
> --
> Please keep list traffic on the list (off-list replies will be rejected)
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