---
name: "nhs_ser"
section: "8"
platform: "linux"
package: "nut"
version: "2.8.5-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nhs_ser"
---

# nhs\_ser(8)

Driver for NHS Nobreaks, senoidal line, with serial port

## NAME

nhs\_ser - Driver for NHS Nobreaks, senoidal line, with serial port

## SYNOPSIS

**nhs\_ser** -h

**nhs\_ser** -a *UPS\_NAME* \[*OPTIONS*\]

**Note**\

This man page only documents the hardware-specific features of the **nhs\_ser** driver. For information about the core driver, see [**nutupsdrv**(8)](/nutupsdrv/8.md).

## SUPPORTED HARDWARE

**nhs\_ser** supports numerous UPS models made by NHS Sistemas Eletronicos LTDA and marketed in Brazil. They feature a serial port and a binary wire protocol.

**Note**\

Currently this driver only builds on Linux. This is expected to change in future revisions of the code.

## EXTRA ARGUMENTS

This driver also supports the following optional settings:

**baud**=*num*

Set the value of serial port baud rate (default: 2400)

**ah**=*num*

Battery discharge capacity in Ampere/hour.

**va**=*num*

Nobreak NOMINAL POWER in VA.

**pf**=*num*

Power Factor to use in calculations of battery time (default: 0.90).

**vin\_low\_warn\_perc**=*num*

Voltage In Percentage to calculate warning low level (default: 2.00).

**vin\_low\_crit\_perc**=*num*

Voltage In Percentage to calculate critical low level (default: 2.00).

**vin\_high\_warn\_perc**=*num*

Voltage In Percentage to calculate warning high level (default: 2.00).

**vin\_high\_crit\_perc**=*num*

Voltage In Percentage to calculate critical high level (default: 2.00).

**numbatteries**=*num*

Num Batteries (override value from nobreak).

**vbat**=*num*

Battery Voltage (default: 12.00).

**debug\_pkt\_raw**

Optional flag to enable debug logging of packet bytes.

**debug\_pkt\_data**

Optional flag to enable debug logging of data packet decoding.

**debug\_pkt\_hwinfo**

Optional flag to enable debug logging of hwinfo packet decoding.

## AUTHORS

Lucas Willian Bocchi \<lucas@lucas.inf.br\>

## SEE ALSO

### The core driver:

[**nutupsdrv**(8)](/nutupsdrv/8.md)

### Internet resources:

The NUT (Network UPS Tools) home page: https://www.networkupstools.org/historic/v2.8.5/