---
name: "pmdaroomtemp"
section: "1"
platform: "linux"
package: "pcp"
version: "6.3.8-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pmdaroomtemp"
---

# pmdaroomtemp(1)

room temperature performance metrics domain agent (PMDA)

## NAME

**pmdaroomtemp** - room temperature performance metrics domain agent (PMDA)

## SYNOPSIS

**$PCP\_PMDAS\_DIR/roomtemp/pmdaroomtemp** \[**-d** *domain*\] \[**-l** *logfile*\]

## DESCRIPTION

**pmdaroomtemp** is a Performance Metrics Domain Agent (PMDA) which exports the temperature from one or more sensors built using the DS2480 and DS1280 chipsets and MicroLAN technology from Dallas Semiconductor Corporation.

The **roomtemp** PMDA exports metrics that reflect the temperatures from one or more of these devices, in both degrees Celsius and Fahrenheit. Each metric has one instance for each temperature sensor device. The external instance identifiers are the serial numbers (in hex) of the DS1280 chips discovered when the MicroLAN was probed.

A brief description of the **pmdaroomtemp** command line options follows:

- **-d**

  It is absolutely crucial that the performance metrics *domain* number specified here is unique and consistent. That is, *domain* should be different for every PMDA on the one host, and the same *domain* number should be used for the same PMDA on all hosts.

- **-l**

  Location of the log file.  By default, a log file named *roomtemp.log* is written in the current directory of [**pmcd**(1)](/pmcd/1.md) when **pmdaroomtemp** is started, i.e. **$PCP\_LOG\_DIR/pmcd**. If the log file cannot be created or is not writable, output is written to the standard error instead.

## INSTALLATION

If you want access to the names, help text and values for the roomtemp performance metrics, do the following as root:

```
# cd $PCP_PMDAS_DIR/roomtemp
# ./Install
```

If you want to undo the installation, do the following as root:

```
# cd $PCP_PMDAS_DIR/roomtemp
# ./Remove
```

**pmdaroomtemp** is launched by [**pmcd**(1)](/pmcd/1.md) and should never be executed directly. The Install and Remove scripts notify [**pmcd**(1)](/pmcd/1.md) when the agent is installed or removed.

## FILES

- **$PCP\_PMCDCONF\_PATH**

  command line options used to launch **pmdaroomtemp**

- **$PCP\_PMDAS\_DIR/roomtemp/help**

  default help text file for the roomtemp metrics

- **$PCP\_PMDAS\_DIR/roomtemp/Install**

  installation script for the **pmdaroomtemp** agent

- **$PCP\_PMDAS\_DIR/roomtemp/Remove**

  undo installation script for the **pmdaroomtemp** agent

- **$PCP\_LOG\_DIR/pmcd/roomtemp.log**

  default log file for error messages and other information from **pmdaroomtemp**

## PCP ENVIRONMENT

Environment variables with the prefix **PCP\_** are used to parameterize the file and directory names used by PCP. On each installation, the file */etc/pcp.conf* contains the local values for these variables. The **$PCP\_CONF** variable may be used to specify an alternative configuration file, as described in [**pcp.conf**(5)](/pcp.conf/5.md).

## SEE ALSO

[**PCPIntro**(1)](/PCPIntro/1.md), [**pmcd**(1)](/pmcd/1.md), [**pcp.conf**(5)](/pcp.conf/5.md) and [**pcp.env**(5)](/pcp.env/5.md).