[Nut-upsuser] Contact-closure UPS

[Charles Lepple]

On Nov 20, 2015, at 12:17 PM, Róbert SZAKSZ <robert at szaksz.eu> wrote:
> 
> No progress has been made:
> 
> cable is UPS - PC
> 6 - 3
> 7 - 5
> 9 - 2
> 

Maybe pins 4 and 7 (ground) both need to be connected on the UPS side?

> for ./blazer_ser -DDDDD -a infosec
>   0.000000     send_to_all: SETINFO driver.parameter.port "/dev/ttyS1"
>   0.000323     debug level is '5'
>   0.103068     send_to_all: SETINFO device.type "ups"
>   0.103104     send_to_all: SETINFO driver.version "2.7.3"
>   0.103118     send_to_all: SETINFO driver.version.internal "1.56"
>   0.103131     send_to_all: SETINFO driver.name "blazer_ser"
>   0.103141     Trying megatec protocol...
>   0.103687     send: 'Q1'
>   1.105456     read: timeout
>   1.105823     blazer_status: short reply

Unfortunately, I don't think there is a safe way (in software) to determine whether the UPS is not receiving the signal, or whether the PC is not receiving the reply.

If you have a multimeter, you could check pin 9 on the UPS relative to pin 4/7 to see if it is being driven negative.

-- 
Charles Lepple
clepple at gmail